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2738 mold steel is a German DIN standard steel grade. It has good mechanical properties and good process ability

2738 mold steel is a German DIN standard steel grade.

It has good mechanical properties and good process ability, so it is widely used in the mold industry. Among them, it is mainly used for the production of plastic molds.

Since the 2738 mold steel has been pre-hardened,when it leaves the factory, it can be directly used for processing, thereby reducing the heat treatment,link in the normal mold production,it processing and improving economic benefits.It’s pre-hardened plastic mold steel,executes standard 29-33HRC.

2738 with about 1% nickel content, good pre-hardness. Due to the addition of the nickel element, its harden ability is improved, and the hardness distribution of large sections,and thick plates is uniform. It is mainly used in large plastic molds and mold bases, such as automobile bumpers and TV shell molds. Suitable for molds requiring high lightness, such as the production of hard rubber (PS),and ultra-hardened rubber (ABS), etc., its characteristics are: excellent processing performance, easy cutting and polishing and electrical corrosion performance.

Nickel is added to 2738 steel to achieve uniform hardness,with superior processing,and polishing properties. Mainly used in high-demand plastic molds, suitable for plastic molds such as televisions, fax machines, plastic parts for home appliances, and automotive parts that require a certain degree of polishing.

German plastic mold steel 2738H is hardened

The nickel component is added to the steel, the hardness is uniform, and it has superior process ability,and polishing performance.China’s GB standard grade 3Cr2NiMo, American AISI standard grade P20 MODIFIED, American AISI standard grade P20 + Ni, German DIN standard grade 1.2738.

Carburizing treatment:F

Carburizing treatment temperature is 850-940 ℃, and the time is determined by the depth of product demand. If the carburizing temperature exceeds 880 ° C ,and the time exceeds 2 hours, normalization treatment must be performed,to keep the structure grains fine. After carburizing, it is cooled to 830 ° C in a furnace, soaked in oil after soaking, and then tempered to increase surface hardness and increase wear resistance. If only hardness is required without fine grains, it can be quenched at a carburizing temperature above 880 ℃

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

A friend told me recently that it seems I did not write about plastic mold steel for a long time.

A friend told me recently that it seems I did not write about plastic mold steel for a long time.OK, Let’s talk about plastic mold steel. Plastic mold steel is mainly divided into 3 types, pre-hardened plastic mold steel, and the second type has anti-corrosion and rust prevention functions. The third is wear-resistant one, of which the pre-hardened one, ordinary plastic mold steel, and the second is a corrosion-resistant mold steel, a pre-hardened plastic mold with anti-rust function. Steel, pre-hardened plastic mold steel with certain wear resistance.

Pre-hardened plastic mold steel

It means that it has been quenched and tempered by factory directly. The mold steel is supplied in a state of hardness. The common hardness is generally between 28-44HRC. The ordinary pre-hardened mold steel is 1.2311, P20. , 738H, 738,OT718,OT718H, NAK80,2316H. 2083H, S136H, etc., this kind of mold steel with hardness, please refer to the following information.

Applications of 1.2311 steel

1.2311 Tool steel is a German Die steel, the steel by “super clean” production 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 good, can be carried out, and can be processed, suitable for the surface treatment of chrome, material hardness even (to 400mm thick), good toughness, good mechanical processing performance. Gold microstructure is martensite and bainite structure.

Main be applied to in zinc, aluminum, magnesium and its alloy die-casting mould ; Hot-pressing mold, all kinds of hot forging die; Metal extrusion die, die set.

Supply form of 1.2311 steel

DIN 1.2311 tool 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 and precision ground steel plate can be supplied, providing a quality precision finished bar to tight tolerances.

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

P20 Steel Plate Mold Steel Sales Promotion after Coronavirus in March from China OTAI Special Steel . We have many stock to provide . Please pay attention to that there is no influence for Chinese Steel market price and reserve . Becasue the situation have caused in Chinese Spring Festival holiday . And after it happened , the government have strictly controlled on this . And all people here was fine and The mill was restored to full working order . Any new inquiry , please working as before .

P20 Steel Plate Mold Steel Sales Promotion after Coronavirus in March from China OTAI Special Steel . We have many stock to provide AISI P20 Steel Plate Material is a versatile . Low-alloy tool steel that is characterized by good toughness at moderate strength levels .

The special purpose mold steel P20 steel plate is commonly used for plastic injection mold cavities and tooling and for die casting dies for zinc . P20 mold steel plate material is typically sold in the pre-hardened condition at a hardness of approximately 300 HBW.

P20 Steel Plate Mold Steel  differs from area to area in the different countries.Europeans generally use the DIN spec-DIN EN ISO 4957 standard materials (1.2311 and 1.2312), while in Japan steel industry standard, PX5 is the new standard P20. And the Americas Countries, Grade steel P20 is the most and wide used steel grade material. In China, 3CrM2Mo is the P20 steel grade equivalent, which is in the standard GB/T 1299 tool steel specification.

P20 Steel Plate Mold Steel  are nitrided or carburized. These P20 mold steel materials steels are capable of being machined into complex and large dies and molds. Material P20 steel plate and round bars are mostly used in the carburized condition. The presence of chromium and nickel enhances the toughness and hardness of mold steel P20 grade material.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

SCM439,otai have more than 16 years of experience in it.

Recently, some clients send me the mail about the SCM439.what’s this kind of steel it is? Its other commonly used name is 4340, it is one of our main products. We received the repeat order every month, just like 4140. our otai company leaves a good impression on our customers. I hope you will have a try.

The women’s day is around the corner, to celebrate the festival, our company send every member a branch of flower, it is special. otai company not only cares about the client but also the employees.I am honor to be a member of our company. I think the development of a company is based on the unity of every member of the company. I think the future of otai company will be better and better.

Today, let’s talk about the SCM439 with you. AISI /SAE 4340 Steel is an Alloy Structural Steel belong to ASTM A29/A29M Steel Grade standard. AISI 4340 used in Oil and Gas industry and Large Machinery Structural. 4340 Steel China Supplier and factory Otai Special Steel Supply 4340 steel in Round bar, Plate, Flat bar, Square, Forging Ring, and others any shape. And provide cutting, sawing, milled, machining processing.

Supply Range of AISI 4340 Alloy Steel

AISI 4340 Steel Round Bar: diameter 5mm – 400mm

SAE 4340 Steel Plate: thickness 5 –500mm x width 200– 2300mm

ASTM 4340 Steel Block: 210mm x 500-810mm

ASTM 4340 steel is an alloy structural steel, 4340 is used for engineering structural, Used as require good toughness, high strength, as well as the important conditioning of large size, heavy machinery such as high load of axial, turbine shaft, larger than 250 mm in diameter of helicopter rotor shaft, turbojet engine turbine shaft, blade, high load of transmission parts, fasteners of the crankshaft. Gear, etc.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

42CrMo4 Steel Pipe Stocklist For Sales Promotion from China after coronavirus . In March , we have received many demands for 42CrMo4 Steel Pipe . Luckly we have many stocklist for this production . And all the measure are according to Chinese regular production size . One out diameter have many different wall thickness to choose .

42CrMo4 Steel Pipe Stocklist For Sales Promotion from China after coronavirus  from OTAI Special Steel . In March , We have received new inquiry from Turkey , Argentina …… for 42CrMo4 Steel Pipe .  And recently we have planned to provide sales promotion for this materials . Because for we have many stock in various out diameter and wall thickness to meeting all your request . Please contact with us urgently . The Inventory is reduced daily . The stock may sold out for some special size .

42CrMo4 Steel Pipe Stocklist Mechanical Tubing are medium carbon alloy grades . Which are widely used for many general-purpose applications that require high tensile strength and toughness . Alloy tubing is an excellent candidate for most processing techniques . Where strength is required and allows for many options due to its available sizes produced .

42CrMo4 Steel Pipe Stocklist alloy tubing is easiest of the common alloy grades to be machined . With a minimal stock allowance for clean-up . It has excellent machining characteristics and is a medium carbon alloy.

42CrMo4 Steel Pipe Stocklist is usually supplied ready heat treated to hardness in 18-22 HRC .  If further heat treatment is required, then heat to 840 oC – 875 oC, hold until temperature is uniform throughout the section . Soak for 10 – 15 minutes per 25 mm section, and quench in oil, water, or polymer as required .

Welcome to inquiry with us 42CrMo4 steel pipe , and we also have other steel pipe AISI 1020 and 1045 . Some less quantities with 4130 tubes , please send request for get the quotation .

jack@otaisteel.com

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

Today let’s talk about the H13 Steel,

H13 is a hot-working die steel. It is a steel type formed by adding alloying elements on the basis of carbon steel. The standard GB / T1299-2000 is implemented.

Let’s talk about H13 Steel  Today.

H13 is a hot-working die steel. It is a steel type formed by adding alloying elements on the basis of carbon steel. The standard GB / T1299-2000 is implemented.

1.Corresponding grade of H13: 4Cr5MoSiV1

H13 Steel mechanical properties: hardness: annealing, 245 ～ 205HB, quenching, ≥50HRC

H13 Steel is the most widely used and representative hot work die steel.Its main characteristics are

(1) It has high hardenability and high toughness;

(2) Excellent resistance to thermal cracking, which can be water cooled in the workplace;

(3) With medium wear resistance, carburizing or nitriding processes can also be used to increase its surface hardness, but the heat crack resistance should be slightly reduced;

(4) Due to its low carbon content, the secondary hardening ability is poor in tempering;

(5) It has anti-softening ability at higher temperatures, but the hardness decreases rapidly when the use temperature is higher than 540 (1000) (that is, the working temperature can be 540);

(6) Small deformation during heat treatment;

(7) Medium and high machinability;

(8) Medium resistance to decarburization.

What is even more remarkable is that H13 Steel can also be used to make important components in the aviation industry.

1. AISI H13 tool steel Chemical composition

AISI H13 Steel Forging

For forging H13 tool steel, first slowly Preheat to 750°C(1382°F), soak enough time, then rapidly heat to 1050-1100 °C(1922-2030°F). then start forging, ensure the forging temperature higher than 850°C(1562°F).  Cool H13 tool steel must be slowly after H13 steel forging finished.

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

Most of my customer asking the formula for calculating weight of steel plate，When they were going to purchasing 4140 plate.

Most of my customer asking the formula for calculating weight of steel plate，When they were going to purchasing 4140 plate.for steel stockist,most of them did the procurement base on ton,but for some trading company and some factory,which is the end users,they would like to buy base on pieces unit.however,as a steel wholesaler,most of the order are charged by tons,that some company they wanna calculate advance by themselves，to estimate the cost .

So now,I try to collect most of the steel formula here.

Formula for calculating weight of steel plate

Formula: 7.85 × length (m) × width (m) × thickness (mm)

Example: steel plate 6m (length) × 1.51m (width) × 9.75mm (thickness)

Calculation: 7.85 × 6 × 1.51 × 9.75 = 693.43kg

Steel tube weight calculation formula

Formula: (outer diameter-wall thickness) × wall thickness mm × 0.02466 × length m

Example: 114mm (outer diameter) x 4mm (wall thickness) x 6m (length) of steel pipe

Calculation: (114-4) × 4 × 0.02466 × 6 = 65.102kg

Round steel weight calculation formula

Formula: diameter mm × diameter mm × 0.00617 × length m

Example: Round steel Φ20mm (diameter) × 6m (length)

Calculation: 20 × 20 × 0.00617 × 6 = 14.808kg

Square steel weight calculation formula

Formula: side width (mm) x side width (mm) x length (m) x 0.00785

Example: Square steel 50mm (side width) x 6m (length)

Calculation: 50 × 50 × 6 × 0.00785 = 117.75 (kg)

Flat steel weight calculation formula

Formula: side width (mm) x thickness (mm) x length (m) x 0.00785

Example: Flat steel 50mm (edge width) x 5.0mm (thickness) x 6m (length)

Calculation: 50 × 5 × 6 × 0.00785 = 11.7.75 (kg)

Hexagonal steel weight calculation formula

Formula: Opposite diameter × Opposite diameter × Length (m) × 0.00068

Example: Hexagonal steel 50mm (diameter) x 6m (length)

Calculation: 50 × 50 × 6 × 0.0068 = 102 (kg)

Rebar weight calculation formula

Formula: Diameter mm × diameter mm × 0.00617 × length m

Example: Rebar Φ20mm (diameter) × 12m (length)

Calculation: 20 × 20 × 0.00617 × 12 = 29.616kg

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

The theoretical weight of 4140 steel is the weight calculated from the nominal size and density of the steel (formerly known as specific gravity).

The theoretical weight of 4140 steel is the weight calculated from the nominal size and density of the steel (formerly known as specific gravity). This is called the theoretical weight. This is directly related to the length, cross-sectional area, and tolerance of the steel. Due to the allowable deviation of the steel in the manufacturing process, the theoretical weight and actual weight calculated by the formula are somewhat different, so it is only used as a reference when estimating.

Actual weight of 4140 steel

The actual weight of steel refers to the weight obtained by the actual weighing (weighing) of the steel, which is called the actual weight. Actual weight is more accurate than theoretical weight.

Calculation method of steel weight

(1) Gross weight is the symmetry of “net weight”, which is the total weight of the steel itself and the packaging material. The transportation company calculates the freight based on gross weight. However, the purchase and sale of steel is calculated based on the net weight.

(2) Net weight is the symmetry of “gross weight”. The gross weight of the steel minus the weight of the packaging material, that is, the actual weight, is called the net weight. In steel purchase and sale, it is generally calculated by net weight.

(3)Tare The weight of 4140 steel packaging materials is called tare.

(4) Weight ton The unit of weight used when calculating freight based on the gross weight of steel. Its legal unit of measurement is ton (1000kg), as well as long ton (1016.16kg in English weight units) and short ton (907.18kg in American weight units).

(5) Billing weight Also known as “billing ton” or “freight ton”. The weight of the steel charged by the transportation department. Different shipping methods have different calculation standards and methods. For railway vehicle transportation, the marked weight of the truck used is generally used as the billing weight. Road transport charges freight based on the tonnage of the vehicle. Less-than-truckload for railways and highways is based on a gross weight of a few kilograms, which is charged at a minimum.

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

How to make sure DC53 no quality complaint for 5 years?

How to make sure DC53 no quality complaint for 5 years?Never purchase the DC53 cheaper than the market price!

A customer from south America-Mr David,he told me that our company’s DC53 is really goods,he sure will reorder in a large quantity next time,Mr David specialized in  Furniture hardware fittings extrusion,his factory’s mould was made by DC53,but it’s purchase at his local market with a cheap price,and it always face the problem of mould bursting.last December,he purchased a batch of DC53 from us,the condition of DC53 is pre-hardening,this year,we did the after sales service,Mr David said :your DC53 really good,the mould bursting less than before,sure will make a larger order next time.Customer’s affirmation is the best way to plus our reputation,and we also happy to tell him that our company’s DC53 no quality complaint for 5 years,and sure he will satisfy with next batch of goods.

If you want to know more about DC53,please check data as below,or contact me when you feel free.

JIS DC53 tool steel china supplier and stockholders, Otai special Steel are Special steel china suppliers of DC53 steel in round bar, flat bar, sheet , plate and steel block. we can saw cutting DC53 as your requirements size. DC53 is improved new type of cold work die steel from SKD11 . The technical specification in Japanese industrial standard JIS G4404.

Cold work DC53 tool steel overcomes the insufficient of SKD11 high temperature tempering hardness and toughness of weakness, DC53 tool steel will fully replace SKD11 tool steel in the field of general and precision mould . Its toughness is 2 times of SKD11,  DC53 toughness is more prominent in the cold work die. Made of DC53 tools steel rarely appear crack and craze, greatly improving the service life.
The DC53 tool steel has a uniform distribution of fine carbides. It has great galling and wear and fatigue resistance. It has also a High temper resistance to support PVD & nitride surface treatments. And it has Machining and grinding properties are superior to most other tool steels.

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

Since the 42Crmo4 for mask machine situation in domestic market,we have contacted some customers who purchase 42Crmo4 often

Since the 42Crmo4 for mask machine situation in domestic market

We have contacted some customers who purchase 42Crmo4 often ,they feel thankful for this news,as the market is slow down by the virus,and now they know some factory are need 42Crmo4 urgently,are going to sale a lot of 42Crmo4.

Now,the virus spread all over the world.A lot of business are slow down,but except the medical supplies,it need a big replenishment,many country are lack of mask heavily,and mask is the base way to protect people clean and keep the virus away,now,many factory are waiting for the mask machine to produce mask,the world is waiting for it.

If you want to know more about the 42Crmo4 for mask machine,please contact me.

 Applications

DIN 42CrMo4 Tool steel is a alloy structural steel,42CrMo4 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.

Heat treatment

• Annealing
  42CrMo4 alloy steel is annealed at 872°C (1600°F) followed by slowly cooling in the furnace.
• Tempering
  42CrMo4 alloy steel can be tempered at 205 to 649°C (400 to 1200°F) depending upon the desired hardness level. The hardness of the steel can be increased if it has lower tempering temperature. For example, tensile strength of 225 ksi cab be achieved by tempering at 316°C (600°F), and a tensile strength of 130 ksi can be achieved by tempering at 538°C (1000°F).
• Hardening
  42CrMo4 alloy steel can be hardened by cold working, or heating and quenching.

       Processing

42CrMo4 steel round bar and flat sections can be cut to your required sizes. ASTM 4140 tool steel ground bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. SAE 4140 steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com