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1.2312 Sheet plate suitable for make plastic mould , use for production high-end Auto Parts and phone parts . OTAI SPECIAL STEEL is Din W-Nr 1.2312 Tool Steel stockholders and suppliers from china. we have more 16 years experience in 1.2312 special tool steel plate, round,  bar, flat bar, square supply.

1.2312 Steel is a high quality plastic tool mold steel . 1.2312 is 1.2311 add about 0.08% Sulphur improve free cutting ability of 1.2311 tool steel . It belong to the high quality medium carbon, Pre-hardness(28~34HRc) plastic mould steel . It needn’t further Make heat treatment for make plasitc injection moulding.
1.2312 tool steel properties is very simliar with ASTM AISI P20S steel . At most work environment,40CrMnMoS8-6/1.2312 steel is equivalent with P20S tool steel .

Related Specifications of Din WN-r 1.2312 tool steel material

Din W-Nr 1.2312 Tool Steel is a nice Plastic Mould steel . we can supply the 1.2312 round bar, steel flat bar, plate, hexagonal steel bar and steel square block . 1.2312 steel Round bar can be sawn to your required lengths as one offs or multiple cut pieces .  Rectangular pieces can be sawn from flat bar or plate to your specific sizes . Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances…

1.2312 Sheet Plate  Tool steel is a plastic injection mould steel material . the steel by “super clean” produce process, pre-hardened .  showing the height of micro pure and excellent homogeneous structure . excellent polishing and light etching engraving . After heat treatment, processing and polishing performance is very good . can be carried out, and can be processed, suitable for the surface treatment of chrome, material hardness .  good toughness, good mechanical processing performance . Gold microstructure is martensite and bainite structure . Main be applied to in plastic steel mold. like car injection moulding, PVC, PP plastic injection molding etc.

1.2312 tool steel round bar and flat sections can be cut to your required sizes. 1.2312 tool steel ground bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. 1.2312 steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

Recently a client from Europe sends a quote to us about the Seamless steel tube. So, today I will share some information about the seamless steel tube with you.

Otai company export steel arrange from the alloy steel to tool steel. The seamless steel tube is also included. ASTM A53/ASTM A106/s355/s752/st37 ,etc. If you have a need, you can choose us as your steel provider.

A steel pipe made of a single piece of metal without seams on the surface is called a seamless steel pipe. According to the production method, seamless tubes are divided into hot-rolled tubes, cold-rolled tubes, cold drawn tubes, extruded tubes, and jacked tubes.

Depending on the application, there are thick-walled pipes and thin-walled pipes. Seamless steel pipes are mainly used for petroleum geological drilling pipes, cracking pipes for the petrochemical industry, boiler pipes, bearing pipes, and high-precision structural steel pipes for automobiles, tractors, and aviation.

Classification of Seamless steel tube

Jointless steel pipe along the perimeter of its cross-section. According to different production methods, it is divided into hot-rolled pipe, cold-rolled pipe, cold-drawn pipe, extruded pipe, pipe jack, etc., all have their own process regulations. Materials are ordinary and high-quality carbon structural steel, low alloy steel, alloy steel, stainless acid-resistant steel, etc. According to the purpose, it is divided into two types: general-purpose (for water transmission, gas pipelines and structural parts, mechanical parts) and special purpose (for boilers, geological exploration, bearings, acid resistance, etc.).

Use of Seamless steel tube

• 1 Seamless steel tubes are widely used. General-purpose seamless steel tubes are rolled from ordinary carbon structural steel, low-alloy structural steel or alloy structural steel with the largest output, and are mainly used as pipelines or structural parts for conveying fluids.
• 2 It is divided into three categories according to different uses:
• Supply according to chemical composition and mechanical properties;
• Supply according to mechanical properties;
• Supply according to the hydrostatic test.

3 For steel pipes supplied according to categories a and b, if they are used to withstand liquid pressure, hydraulic tests are also required.

Special-purpose seamless pipes include boiler seamless pipes, chemical and electric power, geological seamless steel pipes and petroleum seamless pipes.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

ASTM 1020 Seamless Tube any size have Adequate stock for sales promotion in April .

OTAI SPECIAL STEEL is 1020 Mild Steel stockholders and suppliers from china. we have more our 16 years experience in special steel supply.

AISI 1020 Steel is a mild carbon steel , 1020 steel belong to the high quality low carbon steel, cold extrusion, carburizing and hardening steel . The low steel strength, toughness, plasticity and weldability are good . Tensile strength of 253-500 mpa, the elongation is 24% or higher .

ASTM 1020 mild steel , we can supply the round bar, flat bar, plate, hexagonal and square block . Diameters can be sawn to your required lengths as one offs or multiple cut pieces . Rectangular pieces can be sawn from flat bar or plate to your specific sizes . Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances .

ASTM 1020 mild steel is suitable for making cars, tractors and general machinery  . small and medium-sized carburizing and carbonitriding and other parts, such as car hand brake shoe .  fork lever shaft, transmission speed, transmission driven gear and the tractor on the camshaft .  hanging equalizer axle, equalizer, inner and outer bushing, etc. .  In the condition of hot rolling or normalizing used in the manufacture of force is not big . but all kinds of high toughness requirement of mechanical parts ;

ASTM 1020 Seamless Tube In medium and heavy machinery industry . such as forging or suppression of rod, shackle, leverage, sleeve, fixture, etc.  . In steam turbine and boiler manufacturing for more pressure or less 6N/㎡ .  the temperature of 450 ℃ or less corrupt media work of pipes, flanges, header, and various kinds of fasteners . On the railway and locomotive vehicles used in the manufacture of the crosshead and piston castings .

1020 mild steel round bar and flat sections can be cut to your required sizes . 1020 steel ground bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances . 1020 steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes .

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

OTAI Special steel supply the Seamless carbon steel pipe and the Alloy steel pipe. It is including the steel grade 1020, 1045, 4140,8620, Q345 and so on. Usually, the random length is ranged in 6-12meters.

The seamless carbon steel pipe has a hollow cross section, and is widely used as a pipeline for transporting fluids. For example used on the pipeline for transporting oil, natural gas, gas, water, and certain solid materials. Compared with solid steel such as round steel, this steel pipe has the same bending and torsional strength and light weight. It is an economical cross-section steel. It is widely used in manufacturing structural parts and mechanical parts. Like using on petroleum drill rods, automotive transmission shafts, Bicycle frames and steel scaffolding used in building construction.

Seamless carbon steel pipe is also an indispensable material for various conventional weapons. Gun barrels, barrels, and the like must be made of steel pipes. It can be divided into round tubes and special-shaped tubes according to the different cross-sectional area shapes. Since the circular area is the largest under the condition of equal perimeter, more fluid can be transported by the circular tube. In addition, when the cross section of the ring is subjected to internal or external radial pressure, the force is more uniform.
The use of steel pipes to manufacture annular parts can improve the utilization rate of materials. It can simplify the manufacturing process. It saves materials and processing hours, such as rolling bearing rings, jack sleeves, etc. And seamless carbon steel pipe have been widely used at present.

Otai exports various tool steel, alloy steel and carbon steel to more than 35countries from Europe and America, Middle East and Asia. Our steel materials meet DIN / ASTM / EN / JIS etc different international standards. We undertake every order to the end and solve customer’s problem without any hesitate on responsibility.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

Time flies, today is the first day of April, 42CD4 Plate mold steel is loaded today, Otai keeps the daily storage to serve better our customers. The 42CD4 Plate  will be our main product in 2020.

Time flies, today is the first day of April, 42CD4 Plate mold steel is loaded today, Otai keeps the daily storage to serve better our customers. The 42CD4 Plate mold steel will be our main product in 2020.

After reading the reports about the globe news, I deeply feel the world is just like a small village as the development of the internet. Every country is tortured by the relentless pandemic, especially in Italy and America .when I witness the fatal disaster, I can’t help thinking about the meaning of life.

In the past time, we may complain a lot, blame someone .however, the disaster teaches us we should cherish life and the people around us. I think we should learn to be thankful, live a meaningful life. AS a member of the Otai special steel company, I am glad to be one of them. we will keep a sincere attitude to serve our customers. We will keep providing better 42CD4 Plate mold steel for the clients.

42CD4 steel is chromium, molybdenum, manganese containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength. The following datasheet gives an overview of AISI 4140 alloy steel.

42CD4 steel material is a high-quality Quenched and Tempered Alloy Structural steel. It belongs to the high-quality medium carbon alloy steel, Oil Quenched & Tempered Hardness is 28-34 HRC. 42CD4 Annealing delivery hardness less than 250HB.

42CD4 Plate mold steel equivalent material

♦JAPAN♦ : JIS SCM440 alloy steel

♦GERMANY♦ : DIN WN-r 1.7255 / 42CrMo4 steel alloy

♦CHINA♦ : GB 42CrMo steel

♦BRITISH♦ : BS 708M40

Otai company is the biggest 42crmo4 stockist in the south of China. 4140 with a thickness of 45mm/41mm is super suitable for the mask machine. we have storage in our factory. The storage is limited, please feel free to connect with me.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

40Cr Round Bar hot rolled sales promotion in the coming month of April . Hope in the April , all the bad situation could overcome  .  The coronavirus could dispear all over the world .

40Cr Round Bar Alloy steel material stockholders and suppliers from China . -OTAI SPECIAL STEEL . we have more 16 years experience in 40Cr steel plate, round bar, flat bar, square supply . 40Cr alloy steel is chromium, molybdenum, manganese containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength. The following datasheet gives an overview of 40Cr alloy steel.

40Cr alloy steel material is a high quality Quenched and Tempered Alloy Structural steel . It belong to the high quality medium carbon alloy steel, Oil Quenched & Tempered Hardenss is 28-34 HRC . 40Cr Annealing delivery hardenss less than 250HB .

40Cr Hot rolled round bar size diameter 20-130MM . Many inventory for sales promotion to regular customer .

We can supply the round bar, steel flat bar, plate, hexagonal steel bar and square, block . 40Cr alloy steel Round bar can be cut to your required lengths as one offs or multiple cut pieces . Rectangular pieces can be cut from flat bar or plate to your specific sizes . Ground tool steel bar can be supply, providing a quality precision finished bar to tight tolerances .

40Cr Tool steel is a alloy structural steel ,  40Cr steel is used for engineering structural, like high tensile shafts . bolts and nuts, gears, pinions and spindles . Locomotive traction with the big gear, supercharger drive gear, pressure vessel . rear axle, gear load of connecting rod and a spring clip,4140 can also be used to under 2000 m deep well of oil drill pipe joint and the fishing tool .  and can be used for bending machine mould, etc .

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

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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Tel: +86-769-23190193

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Email: Jack@otaisteel.com

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