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The  steel material for mold is too much, how to choose one satisfied your demand? I want to talk about it with you today .hope it is helpful to you.

The commonly used  steel material for mold can be divided into 4 kinds

1Sweden standard S136、8407、DF-2

2American standard 420 、H13、P20、D2

3Japan standard SKD61、DC53、NAK80、SKD11、SKH-9

4 German standard 1.2379、1.2083、1.2316、1.2344

According to the different requirement, you can pick the steel material for mold fits for you.

S136, 1.2316, 420 and other mold steels are generally selected for highly corrosive plastics, and S136, 1.2316, 420, SKD61, NAK80, PAK90, OT718, etc. can be selected for weakly corrosive plastics. The appearance requirements of the product also have a great impact on the choice of mold materials. Transparent parts and products that require mirror polishing of the surface. The materials available are S136, 1.2316, OT718, NAK80, PAK90, 420. Molds with high transparency requirements should be selected. S136, followed by 420.

300,000 to 500,000 molds use more pre-hardened materials, such as S136H, 1.2316H, OT718H, 1.2083H, etc. P20, OT718, 738, OT618, 1.2311, 1.2711, etc. are used for molds with less than 300,000 times. For ultra-low requirements of the mold can consider using S50C, 45 # steel directly on the mold blank to make the cavity.

Cold work dies steel is mainly used to make molds for press forming of workpieces in a cold state. Such as cold punching die, cold stamping die, cold deep drawing dies, embossing die, cold extrusion die, thread pressing die and powder pressing die. The range of cold-work dies steel is very wide, from various carbon tool steel, alloy tool steel, high-speed steel to powder high-speed steel and powder high alloy mold steel.

Hot work dies steel is mainly used to make molds for pressure processing of workpieces under high-temperature conditions. Such as hot forging dies, hot extrusion dies, die casting dies, hot upset dies, etc. Commonly used hot work die steels are: medium and high carbon alloy die steels with alloy elements such as Cr, W, Mo, V added.for special requirements of hot work die steels, sometimes high alloy austenitic heat resistant die steels are used.

Aluminum alloy die-casting molds have higher requirements for materials. Die steel should be selected according to specific mold design requirements. Die-casting molds have high requirements for heat treatment technology. When selecting reliable materials, they must also fully consider heat treatment. The preferred steel is 8418, H13, SKD61, 8407, etc.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

OT718  mold steel

OT718 plastic mold steel  has excellent mechanical properties and workability, and the processing technology is simple, so it is widely used in mold processing and production industries. In addition, the OT718 mold steel has been pre-hardened to a hardness of 41 ~ 47HRC through a special production process when it leaves the factory, which can reduce the heat treatment link in some projects and improve economic efficiency.

OT718 mold steel, China’s grade 3Cr2NiMo is an improved steel grade in P20 (3Cr2Mo).

The quality has been greatly improved, so that it can fill the shortage of P20 mold steel and meet the occasions where P20 mold steel fails to meet the requirements. In addition to the above-mentioned Chinese standard steel grades, the steel grades currently appearing in China’s mold steel market include P20 + Ni. So in addition to not being used for plastic mold parts with corrosion resistance requirements, it is currently the most widely used general plastic mold steel typical steel grade. It is often called “advanced” plastic mold steel, and the newly developed new steel grades often take it as a typical comparison.

Delivery status: Steel is delivered in annealed condition. After agreement between the two parties, it can also be delivered without annealing.

OT718 steel is pre-hardened, and the material is uniform. The cleanliness is high. It has excellent polishing performance and photolithography. It also has high hardenability, good electrical processing performance and skin texture processing performance. Pre-hardened steel can be used in the mold cavity without quenching, and the flange can be flame hardened to increase the hardness to 52HRC.

The steel has good machinability and wear resistance, and the hardness distribution is uniform. It also has good polishing performance, simple processing technology and moderate price, so the amount is large.

China’s GB standard steel number 3Cr2NiMo; German DIN standard material steel number 1.2738;American AISI / SAE standard steel number P20 + Ni; Japanese JS standard steel number SNCM optimization; ISO Standard No. 35CrMo2.

OT718 mold steel uses the same as P20 type mold steel, but because of better hardenability and better performance, it can make large-sized, high-grade plastic mold forming parts. With the development of plastic molds, there will be more and better updated improved mold steel numbers, such as B30H of Baosteel in China.

Thermoplastic injection mold, extrusion mold.

Mold steel

Mold steel

Thermoplastic blow mold.

The main parts of the heavy-duty mold.

Cold structural parts.

Commonly used in the manufacture of TV cases, washing machines, refrigerator inner cases, buckets, etc.

Used for large and long-life plastic injection molds, such as home appliances, computer housings and other molds. Due to its high hardness, the blow molds for plastic products molds with high surface finish can be used as slider forming tools in plastic molds; mold parts that can be flame-hardened or nitrided according to production needs. Steel type: Pre-hardened plastic mold steel Steel features: Polished, galvanized, welded and machinable Good condition: Hardened and tempered to HB290-330

Vacuum degassing refining process is pure steel, suitable for plastic molds requiring

It is supplied in the pre-hardened state and can be directly used for mold processing without heat treatment, which shortens the construction period.

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1.2738 Mold steel

DIN 1.2738 steel is one kind of plastic mold steel, equivalent to AISI P20+Ni tool steel. While Nickel, chromium and molybdenium are the alloying elements for hardness and toughness.  1.2738 tool steel is specially designed for plastic mold industry, especially for big steel mold parts.

• DIN 1.2738 tool steel is usually supplied as pre-hardened/quenched and tempered 280 – 320 HB hardness condition
• With good machinability, DIN 1.2738 steels is with better polishability compared to 1.2312 (AISI P20+S).
• Material 1.2738 can be through nitrogenation and flame hardening treatment in order to increase the hardness and wearability of mould surface.
• The steel 1.2738 is melted in an electrical furnace and refined with VOD or DH device.

• Supply Range of 1.2738 steels
• Round Bar: diameter 20mm – 1000mm
• Steel Plate and Steel Block: thickness 12-500mm x width 200-2000mm
• Surface Finish: Black Surface, Roughly Machined, Peeled & Turned or as per given requirements.

DIN 1.2738 Mold Tool Steel Properties

Physical properties at ambient temperature

Modulus of elasticity [103 x N/mm2]: 205

Density [g/cm3]: 7.80

Thermal conductivity [W/m.K]: 29.0

Specific heat capacity[J/g.K]: 0.46

Strength:≈ 1080 N/mm²

Thermal Conductivity at 100 °C:33.5 W/m K

RFQ OF 1.2738

Forging of 1.2738 Tool Steel

Hot forming temperature: 1093-898 °C.

Heat Treatment of Mold Steel 1.2738

Heat Treatment of 2738

Usually already pre-toughened, no heat treatment required, if there is no special requirements.

Soft annealing,

710 to 740 °C for about 2 to 5 hours; then cool slowly of 10 to 20 °C per hour to about 600 °C further cooling in air, This will produce a maximum Brinell hardness of 235.

Hardening:

Harden from a temperature of 840-870°C followed by oil, then quenching in oil/hot bath/air 180~220 °C. Hardness after quenching is around 52 HRC.

Tempering of material

Slow heating to tempering temperature immediately after hardening; and minimum time in furnace: 1 hour per 20 mm part thickness; tempering twice is recommended.

Applications of DIN 1.2738 Steel

1.2738 mold steel materials are generally used for relatively low temperature applications such as die casting dies and injection moulds, synthetic plastic moulds dies, especially for large plastic moulds higly stressed in core, hydroforming tools, such as up to 400 mm in the construction of plastic moulds. DIN 1.2738 is suitable for nitriding and chrome plating.

Contact us for further information or the best cost or price of your request.

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com

1.2738 mould steel with details introduction .

DIN 1.2738 is an upgraded version of plastic mold steel 0f 1.2311, which normally supplies in Pre hardened condition. Hardness in as supplied condition 280-320 HB. The additional nickel content of 1 % increases through hardening. It is micro-alloyed. It has good machinability, suitable for texturing, outstanding polishability, adequate corrosion resistance. vacuum-degassed steel with the following excellent features.

1.2738 Steel Round Bars / 1.2738  Steel Flat Bars can be avail as rolled, forged in the annealed condition with black or bright (peeled or proof machined) finish.

Size Specifications: Can offer 1.2738 Steel Round Bars / 1.2738 Steel Flat Bars in the size range of 22mm up to 350mm in diameter.

Chemical composition of 1.2738  Steel Round Bars / 1.2738  Steel Flat Bars / 1.2738 Bars / 1.2738:

Element: Percentage

Carbon, C: 0.35-0.45

Manganese, Mn: 1.30-1.60

Silicon, Si: 0.20-0.40

Chrome, Cr: 1.80-2.10

Molybdenum, Mo: 0.15-0.25

Nickel, Ni: 0.90-1.20

Phosphorus, P: 0.03

Sulfur, S: 0.03

Other possible products of Plastic Mould Tool Steel DIN 1.2738 are as follows:

DIN 1.2738 Rods, DIN 1.2738 Blooms, DIN 1.2738 Billets, DIN 1.2738 Bars, DIN 1.2738 Round Bars, DIN 1.2738 Flat Bars, DIN 1.2738 Round Corner Square Bars, DIN 1.2738 RCS Bars, DIN 1.2738 Straight Corner Square Bars, DIN 1.2738 SCS Bars, DIN 1.2738 Square Bars, DIN 1.2738 Rectangular Bars, DIN 1.2738 Hexagonal Bars, DIN 1.2738 Forged Bars, DIN 1.2738 Rolled Bars, DIN 1.2738 Black Bars, DIN 1.2738 Bright Bars, DIN 1.2738 Proof Machined Bars, DIN 1.2738 Hollow Bars, DIN 1.2738 Normalized Bars, DIN 1.2738 Annealed Bars, DIN 1.2738 Hardened (Quenched) Tempered Bars, DIN 1.2738 Blocks, DIN 1.2738 Slabs, DIN 1.2738 Circles, DIN 1.2738 Patta, DIN 1.2738 Forgings, DIN 1.2738 Machined Parts, DIN 1.2738 Shafts, DIN 1.2738 Pipes, DIN 1.2738 Seamless Pipes, DIN 1.2738 Heavy Wall Thickness Pipes, DIN 1.2738 Tube.

The client can buy smaller quantities of 1.2738  Steel Round Bars / 1.2738  Steel Flat Bars / 1.2738 Bars / 1.2738 online from our associated manufacturing unit in India at a premium cost.

If any requirements for 1.2738 Steel Round Bars / 1.2738  Steel Flat Bars / 1.2738 Bars / 1.2738 kindly do contact us.

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com

1.2738 mold steel with  more details introduction

DIN 1.2738 is an upgraded version of plastic mold steel 0f 1.2311, which normally supplies in Pre hardened condition. Hardness in as supplied condition 280-320 HB. The additional nickel content of 1 % increases through hardening. It is micro-alloyed. It has good machinability, suitable for texturing, outstanding polishability, adequate corrosion resistance. vacuum-degassed steel with the following excellent features.

1.2738  Steel Round Bars / 1.2738  Steel Flat Bars can be avail as rolled, forged in the annealed condition with black or bright (peeled or proof machined) finish.

Size Specifications: Can offer 1.2738  Steel Round Bars / 1.2738  Steel Flat Bars in a size range of 22mm up to 350mm in diameter.

Chemical composition of 1.2738 Mould Steel Round Bars / 1.2738 Steel Flat Bars / 1.2738 Bars / 1.2738:

Element: Percentage

Carbon, C: 0.35-0.45

Manganese, Mn: 1.30-1.60

Silicon, Si: 0.20-0.40

Chrome, Cr: 1.80-2.10

Molybdenum, Mo: 0.15-0.25

Nickel, Ni: 0.90-1.20

Phosphorus, P: 0.03

Sulfur, S: 0.03

Other possible products of Plastic Mould Tool Steel DIN 1.2738 are as follows:

DIN 1.2738 Rods, DIN 1.2738 Blooms, DIN 1.2738 Billets, DIN 1.2738 Bars, DIN 1.2738 Round Bars, DIN 1.2738 Flat Bars, DIN 1.2738 Round Corner Square Bars, DIN 1.2738 RCS Bars, DIN 1.2738 Straight Corner Square Bars, DIN 1.2738 SCS Bars, DIN 1.2738 Square Bars, DIN 1.2738 Rectangular Bars, DIN 1.2738 Hexagonal Bars, DIN 1.2738 Forged Bars, DIN 1.2738 Rolled Bars, DIN 1.2738 Black Bars, DIN 1.2738 Bright Bars, DIN 1.2738 Proof Machined Bars, DIN 1.2738 Hollow Bars, DIN 1.2738 Normalized Bars, DIN 1.2738 Annealed Bars, DIN 1.2738 Hardened (Quenched) Tempered Bars, DIN 1.2738 Blocks, DIN 1.2738 Slabs, DIN 1.2738 Circles, DIN 1.2738 Patta, DIN 1.2738 Forgings, DIN 1.2738 Machined Parts, DIN 1.2738 Shafts, DIN 1.2738 Pipes, DIN 1.2738 Seamless Pipes, DIN 1.2738 Heavy Wall Thickness Pipes, DIN 1.2738 Tube.

The client can buy smaller quantities of 1.2738 Steel Round Bars / 1.2738  Steel Flat Bars / 1.2738 Bars / 1.2738 online from our associated manufacturing unit in India at a premium cost.

If any requirements for 1.2738 Steel Round Bars / 1.2738 Steel Flat Bars / 1.2738 Bars / 1.2738 kindly do contact us.

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com

1.2738 mold steel with regarding component and details introduction

1.2738 mould steel

Main performance editor

1. Uniform hardness

2.Excellent polishing performance

3.Good machining performance

4.Pre-hardened plastic mold steel

5. Nitriding can be applied
6. Suitable surface treatment, such as: Cr plating

Physical properties edit

(Sample hardness 340HBW, at room temperature and high temperature)

1) Temperature 20 ° C / 200 ° C / 400 ° C, density 7.8g / cm / 7.75g / cm / 7. 7g / cm.

2) Temperature 20 ~ 200 ° C / 20 ~ 400 ° C, coefficient of linear expansion: 12.6 × 10K / 13.5 × 10K.

3) Temperature 20 ° C / 200 ° C / 400 ° C, thermal conductivity 29.0W · (m · K) /29.5W· (m · K) /31.0W· (m · K)

4) Temperature 20 ° C / 200 ° C / 400 ° C, elastic modulus: 205000MPa / 200000MPa / 185000MPa

Editing of mechanical properties

(Sample hardness 340HBW)

1) Temperature 20 ° C / 200 ° C / 400 ° C, tensile strength 1100MPa / 1050MP8 / 850MPa.

2) Temperature 20 ° C / 200 ° C / 400 ° C, conditional yield strength 980MPa / 925MPa / 770MPa.

3) Temperature 20 ° C / 200 ° C / 400 ° C, reduction in area of ​​49% / 51% / 52%

4) Temperature 20 ° C / 200 ° C / 400 ° C, elongation 13% / 14% / 16%

5) Temperature 20 ° C / 200 ° C / 400 ° C, impact toughness (≥) 20J / cm / 32J / cm / 42J / cm

Process specification editor

Soft annealing

The annealing temperature is 710 ~ 740 ° C, and the heat preservation time is determined by 1h per 25mm wall thickness. After the heat preservation, it is cooled with the furnace.

Destress

The heating temperature is 600 ° C (annealed state), 550 ° C (quenched and tempered state). The heat preservation time is determined as 1h per 50mm wall thickness. After the heat preservation, it is cooled with the furnace.

Quenching and tempering

Preheating temperature is 500 ~ 600 ° C, quenching temperature is 840 ~ 880 ° C, heat preservation is 30min (the mold must be quenched in a protective atmosphere to avoid oxidation and decarburization). Oil-cooled, cooled to 50 ~ 70 ° C, and tempered immediately.

Tempering and holding time is determined according to the thickness of the workpiece 1h every 25mm, at least 2h. Tempering temperature 180 ° C / 200 ° C /

300 ° C / 400 ° C / 500 ° C / 600 ° C, hardness 52HRC / 51HRC / 48 HRC / 46HRC / 42HRC / 34HRC.

Induction hardening

The steel can be surface-hardened to 50HRC by flame or induction hardening, and air-cooled after hardening. Small modules can use general quenching medium. After hardening, they should be tempered immediately. The tempering temperature is 180 ~ 200 ° C.

Nitriding Specification

Nitriding temperature × nitriding time: 525 ° C × 20h, nitride layer thickness 0.30mm; 525 ° C x30h, nitride layer thickness 0.35mm; 525 ° C × 50h, nitride layer thickness 0.50mm.

Soft nitriding

After 570 ° C for 2h, the surface hardness of the mold is about 700HV, and the depth of the nitrided layer is about 0.1mm. [2]

Practical application

1.-Skin pattern, pear skin pattern, imitation stone pattern etching mold.

2.- Transparent plastics such as stationery boxes and daily necessities containers require high gloss molds.

3.- Particularly suitable for hard rubber (PS) and non-breakable rubber (ABS) parts.

4.- Large molds with high output requirements such as automobile bumpers, interior parts, refrigerators, and air conditioners.

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com

AISI 8620 Round Bar alloy Steel is a high quality Quenched and Tempered Alloy Structural steel .  It belong to the high quality low carbon . Low alloy chromium, molybdenum, nickel case hardening steel . Oil Quenched & Tempered Hardenss is 28-34 HRc . AISI 8620 steel Annealing delivery hardenss less than 250HB.

AISI 8620 Alloy structural steel properties is a Nickel chromium molybdenum alloy steel specification .

8620 With a lower carbon content range, So AISI 8620 alloy steel have good weldability .  AISI 8620 Steel is equivalent to Din 21NiCrMo2 | W-Nr 1.6523, GB 20CrNiMo, BS 805M20, NF 20NCD2,JIS SNCM220 Steel. Most applications can replace each others

Related Specifications ASTM A29/A29M DIN EN 10083/3 JIS G4053 GB GB/T 3077 .

AISI 8620 Round Bar Annealled have stocklist for sales promotion in April . Dongguan OTAI SPECIAL STEEL is 8620 Alloy steel stockholders and suppliers from china . More 16 years experience in AISI 8620 steel plate, flat bar,round bar, square supply.

AISI 8620 steel is widely used for a variety of applications . For the used in the automotive and engineering industries for toolholders and other such components . Typical applications such as valve bodies, pumps and fittings, Shaft . The high load of wheel, bolts, double-headed bolts, gears, etc .

AISI 8620 alloy steel round bar and flat sections can be cut to your required sizes . 8620 alloy steel ground bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. AISI 8620 steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes .

Although the coronavirus infected all over the world . But the sales promotion of AISI 8620 alloy steel did not affected .  The round bar hot rolled and Annealled have lots of inventory . Any intersting , please contact with us directly .

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

1.2738 mold steel

Basic information for 1.2738 mold steel

1.2738 mold steel is a mold steel material produced in accordance with the German DIN standard. It has relatively superior mechanical properties and good processability among similar grades of steel. It is mainly used for processing and production of hot work molds. Among them, plastic molds are the most common . In addition, the special pre-hardening treatment of the steel makes it have a good hardness when it leaves the factory, which can reduce the heat treatment link in the processing and production of normal molds and improve economic efficiency.

1.2738 mold steel is pre-hardened plastic mold steel

1.2738 steel uses advanced mold steel refining technology, which is a Cr-Ni-Mo alloy steel that is vacuum-melted. The steel has excellent polishability and photoetching performance; excellent workability; good wear resistance; large molds have uniform hardness and dense structure; no risk of cracking and heat treatment deformation, no heat treatment required, shortening the mold making cycle; good Surface nitriding property; surface flame hardening treatment can be performed to improve mold surface hardness and wear resistance. Before the mold is quenched, it must be fully softened and annealed. After quenching, temper in time and heat slowly.

Fine-discharge machining at the post-electro-machining stage should be performed with low current and high frequency to avoid damage to the mold. After discharge, the surface of the mold should be ground to remove the “electric spark white layer”, and then tempered at 500 ° C to remove stress.

When grinding the tempered mold, in order to prevent grinding cracks and surface softening, attention should be paid to: adequate cooling; appropriate grinding pressure; reasonable processing technology.

The steel pre-hardened steel has good polishing performance, usually alumina or gypsum polishing. The first is rough polishing, and then polishing with increasingly finer abrasives. The polishing direction of the abrasive must be changed each time. The final polishing time should not be too long, otherwise it will affect the surface roughness of the mold.

Nitriding can increase the hardness of the mold surface, improve wear resistance and corrosion resistance. Although the steel has been pre-hardened, the hardness can be increased by heat treatment.

Chemical composition editing

C: 0.35-0.46

Si: 0.2-0.4

Mn: 1.3-1.6

P: ≦ 0.035

S: ≦ 0.005

Cr: 1.8-2.2

Mo: 0.15-0.25

Ni: 0.9-1.2

Reference grade editing

Chinese GB standard grade 3cr2NiMo, German DIN standard grade 40CrMnNiMo8 6 4. German DIN standard material number 1.2738, American AISI standard grade P20 + Ni, Japanese JIS standard grade PDS5S

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Tel: +86-769-23190193

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Email: Jack@otaisteel.com

If you are looking for 40 CMD8+S steel, you can stretch out to me, Otai company provides a different kind of material for the mold factory.

With the development of china’s economy, the mold industry plays an important role day by day. The mold industry is still a potential industry. I would like to talk about the mold steel 40 CMD8+S with you.

the future of 40 CMD8+S steel as a part of mold factory.

40 CMD8+S steel is standard of French, it is equivalent to p20+s. It is a high alloy Chrome Cold work tool steel, it is also widely used in the manufacture. The mold industry has a history of about 50 years in china. It has a great improvement in 2010. However, with fierce competition, it is really hard to be an excellent one in the mold industry. As a member Otai steel company, in my opinion, the spring of mold steel will come soon.

Every country is tortured by the pandemic, every industry faced a hard time. at this key moment, the mask is badly needed. The mask factory is busy buying the mask mold steel to produce more masks. The mold industries play a vital role. In china, the manufacture is still important .it means the mold industry has a bright future.

40 CMD8+S is made for the cold work Plastic tool steel Materials, it has good cutting properties, usually uses a plastic mold, Injection molding and die mold. The P20S steel materials delivery condition as per different customer requirements, usual delivery condition as Pre-hardness, hardness 28-34 HRC. Otai special steel is a professional AISI P20S tool steel supplier, Inventory and manufacturer.

Application of 40 CMD8+S steel

Tool steel P20 + S is suitable for mold production, improve the machining performance is required. Typical applications include support and injection mold, mold holders and zinc die casting mold. P20S is a versatile plastic mold and the characteristics of high strength steel apply to many other applications, such as axis and wear a belt.

If you are looking for 40 CMD8+S, you can stretch out to me, Otai company provides a different kind of material for the mold factory. Any questions, you can send me an email.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

1.2738 mold steel

Main performance editor-1.2738 MOULD STEEL 

1. Uniform hardness

2.Excellent polishing performance

3.Good machining performance

4.Pre-hardened plastic mold steel

5. Nitriding can be applied
6. Suitable surface treatment, such as: Cr plating

Physical properties edit

(Sample hardness 340HBW, at room temperature and high temperature)

1) Temperature 20 ° C / 200 ° C / 400 ° C, density 7.8g / cm / 7.75g / cm / 7. 7g / cm.

2) Temperature 20 ~ 200 ° C / 20 ~ 400 ° C, coefficient of linear expansion: 12.6 × 10K / 13.5 × 10K.

3) Temperature 20 ° C / 200 ° C / 400 ° C, thermal conductivity 29.0W · (m · K) /29.5W· (m · K) /31.0W· (m · K)

4) Temperature 20 ° C / 200 ° C / 400 ° C, elastic modulus: 205000MPa / 200000MPa / 185000MPa

Editing of mechanical properties

(Sample hardness 340HBW)

1) Temperature 20 ° C / 200 ° C / 400 ° C, tensile strength 1100MPa / 1050MP8 / 850MPa.

2) Temperature 20 ° C / 200 ° C / 400 ° C, conditional yield strength 980MPa / 925MPa / 770MPa.

3) Temperature 20 ° C / 200 ° C / 400 ° C, reduction in area of ​​49% / 51% / 52%

4) Temperature 20 ° C / 200 ° C / 400 ° C, elongation 13% / 14% / 16%

5) Temperature 20 ° C / 200 ° C / 400 ° C, impact toughness (≥) 20J / cm / 32J / cm / 42J / cm

Process specification editor

Soft annealing

The annealing temperature is 710 ~ 740 ° C, and the heat preservation time is determined by 1h per 25mm wall thickness. After the heat preservation, it is cooled with the furnace.

Destress

The heating temperature is 600 ° C (annealed state), 550 ° C (quenched and tempered state). The heat preservation time is determined as 1h per 50mm wall thickness. After the heat preservation, it is cooled with the furnace.

Quenching and tempering

Preheating temperature is 500 ~ 600 ° C, quenching temperature is 840 ~ 880 ° C, heat preservation is 30min (the mold must be quenched in a protective atmosphere to avoid oxidation and decarburization). Oil-cooled, cooled to 50 ~ 70 ° C, and tempered immediately.

Tempering and holding time is determined according to the thickness of the workpiece 1h every 25mm, at least 2h. Tempering temperature 180 ° C / 200 ° C /

300 ° C / 400 ° C / 500 ° C / 600 ° C, hardness 52HRC / 51HRC / 48 HRC / 46HRC / 42HRC / 34HRC.

Induction hardening

The steel can be surface-hardened to 50HRC by flame or induction hardening, and air-cooled after hardening. Small modules can use general quenching medium. After hardening, they should be tempered immediately. The tempering temperature is 180 ~ 200 ° C.

Nitriding Specification

Nitriding temperature × nitriding time: 525 ° C × 20h, nitride layer thickness 0.30mm; 525 ° C x30h, nitride layer thickness 0.35mm; 525 ° C × 50h, nitride layer thickness 0.50mm.

Soft nitriding

After 570 ° C for 2h, the surface hardness of the mold is about 700HV, and the depth of the nitrided layer is about 0.1mm. [2]

Practical application

1.-Skin pattern, pear skin pattern, imitation stone pattern etching mold.

2.- Transparent plastics such as stationery boxes and daily necessities containers require high gloss molds.

3.- Particularly suitable for hard rubber (PS) and non-breakable rubber (ABS) parts.

4.- Large molds with high output requirements such as automobile bumpers, interior parts, refrigerators, and air conditioners.

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com