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42CD4 Steel Plate the best raw materials for make facemask machine mould . In the beginning of this year 2020 . From January to now , the coronavirus spread to all over the world . And the best way to avoid of infect for this were wearing with facemask .

In the special period affected by the new crown virus in the world . The daily demand for masks has reached the maximum . And the demand for mask machines for producing masks has also increased greatly . It is used as the raw material for the mold of the mask machine . The demand for 42CD4 Steel Plate is taken for granted .

42CD4 Steel Plate

42CD4 Steel Plate the best choice of make facemask machine mold . 42CD4 Alloy steel material stockholders and suppliers from China-OTAI SPECIAL STEEL . we have more 16 years experience in 42CD4 steel plate, round bar, flat bar, square supply . 42CD4 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 42CD4 alloy steel.

42CD4 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 . 42CD4 Annealing delivery hardenss less than 250HB .

42CD4 Tool steel is a alloy structural steel .  42CD4 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, 42CD4 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

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1.2311 Mould Steel the best way for make plastic mould . OTAI SPECIAL STEEL is Din 1.2311 steel stockholders and suppliers from china . we have more than 16 years experience in 1.2311 special steel and plastic mould steel supply.

1.2311 tool steel is a mould materials for plastic injection . It belong to the high quality medium carbon,Pre-hardness(28~34HRc) .  Cold work plastic mould steel . It no need further heat treatment . so you don’t have any worry about distortion or cracking . 2311 steel is most widely used to plastic mold material in injection plastic mould.

1.2311 Mould Steel suitable for make plastic mold . 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.

1.2311 Mould 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.

1.2311 Tool steel round bar and flat sections can be cut to your required sizes . 1.2311 tool steel ground bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances . 1.2311 tool steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.

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High Speed Steel –M2 with good quality and high hardness

The difference between m2 high-speed steel and 6542 high-speed steel

In the field of modern mechanical processing, whether it is traditional manufacturing such as machinery, automobiles, ships, railways, molds, textiles, etc .; high-end and emerging applications include aerospace, information industry, etc., high-speed steel is widely used. m2 high-speed steel, as a molybdenum-based high-speed steel, has a mold with small carbide unevenness and high toughness. Suitable as a mold for shock and impact loads. Because of its moderate hardness and abrasion resistance, it is mostly used to make material tools that are difficult to cut.

The difference between m2 high-speed steel and 6542 high-speed steel

The difference between m2 high-speed steel and 6542 high-speed steel is that m2 is an American standard grade, and 6542 is the common name of domestic W6Mo5Cr4V2 grade.

m2 high-speed steel is a molybdenum-based high-speed steel, commonly known in China as 6542. Corresponding to US steel standard US steel standard t11302 and US astm / aisiae standard steel steel m2 (normal carbon), the hot working specification start temperature is 1040 ～ 1150 ℃, and the end temperature is 930 ℃. The annealing standard temperature is 820 ～ 870 ℃, and the hardness after annealing is 207 ～ 235hbs. The normal quenching and tempering specifications have a quenching temperature of 1190-1230 ° C, the quenching medium is oil, air cooling or a salt bath, a tempering temperature of 540-600 ° C, and a hardness of 65-60hrc. Die quenching and tempering specifications preheating temperature 730 ~ 850 ℃, quenching temperature salt bath furnace 1216 ℃, controlled atmosphere furnace 1227 ℃, tempering temperature 550 ℃, hardness after tempering ≥ 64hrc.

The corresponding grade of m2 high-speed steel in China is W6Mo5Cr4V2. There is no difference in chemistry and properties.

We all know that the chemical composition of m2 high-speed steel is: carbon C: 0.80 to 0.90 silicon, Si: 0.20 to 0.45 manganese, Mn: 0.15 to 0.40, sulfur S: ≤ 0.030, phosphorus P: ≤ 0.030, chromium Cr: 3.80 to 4.40, Nickel Ni: allowable residual content ≤ 0.30, copper Cu: allowable residual content ≤ 0.25, vanadium V: 1.75 to 2.20, molybdenum Mo: 4.50 to 5.50, tungsten W: 5.50 to 6.75.

Application fields of m2 high-speed steel and 6542 high-speed steel ① Moulds suitable for bearing shock and impact loads: deep-drawing dies and punching dies. ② Metal cutting saw blades, cold heading and extrusion tools.

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High Speed Steel –M2 with good quality and high hardness

There a column mentioned a question that does the high speed steel M2 can be made a kitchen knife ?

It is a common that all high speed steel with good quality because its own with high alloy chemical in sheet chart but it is doesn’t mean that can work every thing by M2 tool steel .

M2 tool steel generally application in the heavy industrial ‘s knife , such as the drill , Moulds suitable for shock and impact loads: deep-drawing dies, punching dies. Metal cutting saw blades, cold heading and extrusion tools.

From the perspective of ensuring specific hardness, Mo and W have similar effects. This steel has the advantages of small carbide unevenness and high toughness, but there are two major disadvantages, which limits its application.

First, the tendency of decarburization is large, so the heat treatment protection requirements are strict. Second, the tendency of grain growth is large, and it is easy to overheat, so the quenching heating temperature should be strictly controlled.

Mould steel characteristics M2 high-speed steel is a molybdenum-based high-speed tool steel. From the perspective of ensuring specific hardness, Mo and W have similar effects. This steel has the advantages of small carbide unevenness and high toughness, but there are two major disadvantages, which limits its application.

First, the tendency of decarburization is large, so the heat treatment protection requirements are strict; second, the tendency of grain growth is large, and it is easy to overheat, so the quenching heating temperature should be strictly controlled.

Delivery status and hardness Annealed, hardness 248HBS; cold-drawn, hardness 262HBS; cold-drawn, annealed hardness 255HBS.

Typical chemical composition (mass fraction,%) of M2 high speed steel C 0.78 ～ 0.88, Si 0.20 ～ 0.45, Mn 0.15 ～ 0.40, P≤0.030, S≤0.030, Cr 3.75 ～ 4.50, Mo 4.50 ～ 5.50, V 1.75 ～ 2.20, W 5.50 ～ 6.75.

Hot working specifications The starting temperature is 1040 ～ 1150 ℃, and the ending temperature is 930 ℃.

Annealing specification Temperature 820 ～ 870 ℃, hardness 207 ～ 235HBS after annealing.

General quenching and tempering specifications The quenching temperature is 1190 ～ 1230 ℃, the quenching medium is oil, air cooling or salt bath, the tempering temperature is 540 ～ 600 ℃, and the hardness is 65-60HRC.

Die quenching and tempering specifications Preheating temperature 730 ～ 850 ℃, quenching temperature salt bath furnace 1216 ℃, controlled atmosphere furnace 1227 ℃, tempering temperature 550 ℃, hardness after tempering≥64HRC

Typical application examples of M2 high speed steel

① Moulds suitable for bearing shock and impact loads: deep-drawing dies and punching dies.

② Metal cutting saw blades, cold heading and extrusion tools.

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High Speed Steel –M2 with good quality and high hardness

M2-1.3343-SKH51-W6M5CR4V2

Difference grade with difference chemical component chart .

All depend on your standard’s request .

All grades of the above that we can supply with you for the regular size in our stock .

M2 high speed steel with great hardness so its appliance to many high-end part in the machine or life service .

hemical composition editing

Carbon C: 0.80 ～ 0.90 (Allowable deviation: ± 0.01)

Silicon Si: 0.20 ～ 0.45 (Allowable deviation: ± 0.05)

Manganese Mn: 0.15 ～ 0.40 (allowable deviation: +0.04)

Sulfur: ≤0.030

Phosphorus P: ≤0.030

Chromium Cr: 3.80 ～ 4.40 (Allowable deviation: ± 0.05)

Nickel Ni: Allowable residual content ≤ 0.30

Copper Cu: Allowable residual content ≤0.25

Vanadium V: 1.75 to 2.20 (permissible deviation: ± 0.05)

Molybdenum Mo: 4.50 ～ 5.50 (Allowable deviation: size≤6, ± 0.05; size> 6, ± 0.10)

Tungsten W ： 5.50 ～ 6.75

Note: According to the agreement between the supply and demand sides, the content of V can be 1.60 ～ 2.20

The main purpose:

Cold forging die, fine blanking die, powder pressing die, etc. Shear die, plastic die with glass fiber, etc. Moulds suitable for shock and impact loads: deep-drawing dies, punching dies. Metal cutting saw blades, cold heading and extrusion tools.

Solidification edit

The effect of Ce on the solidification structure of M2 high-speed steel and its mechanism were studied. It was found that Ce in high-speed steel can reduce the segregation of alloying elements such as W and Mo, and reduce and refine the amount of eutectic carbides. Ce is mainly segregated at the interface between grain boundary eutectic carbides and austenite, with some Ce. Participates in the formation of Ce-containing M2C carbides; Ce promotes network breakage and pelletization of eutectic carbides when heated at high temperatures.

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Introduction of 30CrNiMo8 alloy steel

30CrNiMo8 has high yield strength, tensile strength and fatigue strength, as well as sufficient plasticity and toughness. Generally, electric arc furnace and oxygen top-blown converter are used for smelting. If it needs to be with more higher requirements. It is made by the external furnace refining, electroslag remelting or vacuum processing, vacuum induction furnace smelting or double vacuum smelting, and appropriate heat treatment.

How about the 30CrNiMo8 application?

30CrNiMo8 steel has a wide range of uses.It is not only used on the high pressure chemical tanks with high pressure and frequent fluctuations. But also used in pressure pipes, plastic molds, and important structures.

It is an alloy structural steel. It is used in engineering structures such as high-strength shafts, bolts and nuts, gears and spindles. Locomotive traction gears, supercharger transmission gears, pressure vessels, rear axles, connecting rod gear loads and spring clips. 30CrNiMo8 can also be used for oil drill pipe joints and fishing alloys below 2000 meters deep wells, for bending machine molds.It is for permanently stressed components with large cross sections for automotive and mechanical engineering.

Our OTAI Special steel could supply this 30CrNiMo8 steel material in round and flat bar. We are the stockiest for different special steel material for more than 21years. And even the Chinese steel market is complicated, but we know  deeply about each steel mill for their specialty. With the long time pre-after sales steel business, OTAI helps the distributor and end users to avoid the quality event complain. So that most of customers place the repeat order to us without any worry. Quality is at the heart of our company as the first, that is why we are professional here on this steel field for over 21years.

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High Speed Steel –M2 with good quality and high hardness

Heat Treatment of M2 Steel HSS

• Anneal

Heat to 1600° F, soak thoroughly at heat. Furnace cool 25° F per hour to 900° F, air cool to room temperature. Approximate annealed hardness 241 Maximum Brinell.

Stress Relief of Unhardened Material: Heat slowly to 1200 to 1250° F. Soak for two hours per inch of thickness at heat. Slow cool (furnace cool if possible) to room temperature.

• Harden

Heat slowly to 1550° F, soak thoroughly, heat to 1850° F, soak thoroughly. Soak time in the furnace varies from a few minutes to 15 minutes, depending tool size, heat capacity of the furnace, and the size of the charge. – Heat to 2150 to 2200° F for max. toughness and minimum distortion. – Heat to 2250 to 2275° F for max. hardness and abrasion resistance.

• Quench

For full hardness, oil quench to 150-200° F. Air quench to 150° F. When quenching in hot salt maintain the quench just above the Ms temperature. After equalizing withdraw parts from the hot salt and air cooled to 150° F.

• Temper

Double temper is mandatory, three tempers are sometimes preferred. Soak for 2 hours per inch of thickness. Air cool to room temperature between tempers. The best tempering range for hardness, strength and toughness is 1000 to 1050° F.

 Machinability of AISI M2 Tool Steel H-SS

Shaping of HSS M2 tool steels can be carried out using grinding methods. However, they have poor grinding capability and hence they are regarded as “medium” machinability tool steel under annealed conditions. The machinability of these tool steels M2 is only 50% of that of the easily machinable W group or water hardening tool steels.

 M2 Tool Steel Applications

The main use of high-speed steels continues to be in the manufacture of various cutting tools.

Typical applications for M2 high speed steel are twist drills, reamers, broaching tools, taps, milling tools, metal saws. M2 is suitable for cold forming tools such as extrusion rams and dies, also widely used in all kinds of cutting tools, knife and punches and die applications, plastic moulds with elevated wear resistance and screws.

Contact us for M2 tool steel price request. We are a better M2 steel tool material supplier for you.

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High Speed Steel –M2 with good quality and high hardness

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Email: Jack@otaisteel.com

30CrNiMo8 Round Bar Diameter size : 20-130MM sales promotion .

OTAI SPECIAL STEEL is 30CrNiMo8 alloy steel stockholders and suppliers from china . we have more 16 years experience in 30CrNiMo8 steel round bar, plate, steel flat bar, square supply.

30CrNiMo8 alloy steel is a high quality Quenched and Tempered Alloy Structural steel . It belong to the high quality medium carbon, Oil Quenched & Tempered Hardenss is 28-34 HRc.4340 Annealing delivery hardenss less than 250HB .

30CrNiMo8 Round Bar is a alloy structural steel,  30CrNiMo8 Round Bar 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 .

30CrNiMo8 Round Bar is Gear, etc.; Can also be used for operating temperature over 400 ℃ of rotor shaft and blade, etc.; And after nitriding processing can also be used to make special performance requirements of the important parts, after low temperature tempering or can be used for ultra-high strength steel after isothermal quenching .

30CrNiMo8 Round Bar and flat sections can be cut to your required sizes. AISI 4340 tool steel ground bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. ASTM 4340 steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes .

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S136 steel sold by Otai company is adorable by the shoe factory.

Recently, the global economy is affected by the pandemic, I am wondering our factory will not as busy as before. However, my boss told us our colleagues work till night. As a company exports steel all over the world,Otai also sells steel in the Chinese mainland, we have many loyal customers. Although it is a hard time for every company .many customers still buy the s136 steel from our company, because they trust us, the quality of our product is assured.

Almost the factories have already resumed production. Many customers producing the shoes buy S136 steel from our company to build to mold. Why they buy the s136 steel as the shoe mold. I would like to share some details about it with you.

There are many advantages to the s136 .the prominent one is it has good corrosion resistance. It costs less even it is used for a long time. also, it keeps smooth as before.

The other advantages of S136 steel are as follows

1.No special protection is required when the mold is operated or stored in a humid environment.

2.Lower production costs

As the cooling channel of the mold is not affected by corrosion (unlike ordinary mold steel), the heat conduction characteristics and cooling efficiency remain stable during the life of the mold, ensuring a permanent forming time for the mold. STAVAX ESR (S-136) is recommended for all molds. Due to its special properties, it is more suitable for the needs of special environments.

3Anti-corrosion and rust. For molds that use corrosive PVC, acetate and other injection molding materials or must be operated and stored in a humid environment.

4Abrasion resistance The use of injection mold materials (including thermoset injection molds) that require high wear or require molds to have a longer working time, such as electronic parts, disposable table knives, utensils, etc.

5Production of optical products such as cameras, sunglasses, chemical instruments, and plastic products with high smooth surfaces.

Mr Jack Tan

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