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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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Email: Jack@otaisteel.com

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.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

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.

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com

High Speed Steel –M2 with good quality and high hardness

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

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 .

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

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

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

1.2343 tool steel is in DIN standard, and in JIS it is SKD6, in AISI it is H11. Our OTAI Special steel is the professional 1.2343 tool steel suppliers, we also supply other different tool steel grades.

Here following we will introduce the main characteristics and applications as below.

About 1.2343 tool steel applications: Tool steel stamped. Small hammer dies, large hammer and press inserts during the hot deformation of structural steels and non-ferrous alloys under conditions of large-scale and mass production. Injection molds of aluminum, as well as zinc and magnesium alloys.

For the 1.2343 steel characteristics as following:

1) High heat resistance hot work die steel.

2) Excellent toughness and scalability in all directions.

3)High thermal fatigue resistance and wear resistance.

4)Nitriding.

5)Good polishing.

6)Good dimensional stability.

7)Good hardenability.

8)Better isotropy than conventional smelted steel.

9)Can also be used for cold work dies.

As the 1.2343 tool steel suppliers, Otai exports various tool steel and alloy to more than 35 countries from Europe and America, Middle East and Asia. Our steel materials meet DIN / ASTM / EN / JIS etc different international standards.Otai is stable and reliable supplier for Fortune 500 companies at home and abroad, such as Thyssenkrupp, China North Industries Group Corporation Limited.

As the history in the steel industry, OTAI always is insisting to ensure we keep providing quality products and differentiated services to our customers. while at the same time, ensuring the well-being of our staff. Heard that this virus maybe affect the global economy heavily. So maybe in the coming months, it will be very difficult for all of us. But I do believe that it is only through working together as a team that we will overcome the setback. OTAI will be always with all of you as the best 1.2343 tool steel suppliers.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

Imagine that if you stop after forging Cr12MoV steel, allow the austenite to recover and start to recrystallize, and then quench immediately, it can inhibit the growth of austenite grains, and also inhibit the re-aggregation and hornification of carbides.

Waste heat quenching-double refinement Forging Cr12MoV steel process

(1)

During the forging Cr12MoV steel process, there are two contradictory factors at play: on the one hand, the hammering effect of forging, which causes the carbide to be broken and broken, and the austenite is seriously deformed; on the other hand, the Forging Cr12MoV steel temperature,it is higher and the deformation,The subsequent austenite immediately recovered，and recrystallized in the gap between hammers, and then began to grow. The crushed carbides also re-gathered with the hammer gap and gradually horned. The effect of temperature is continuous, and the refinement of hammering is intermittent. If the forging ratio is not enough, the stopping forging temperature is too high, and the number of fires is too large, the grains will be coarsened, the carbides will be coarse and multi-angled, the fracture of the workpiece will be coarse-grained, and the corners will be brittle.

(2)

When the sintering is stopped and slowly cooled, the carbides will grow, the carbon in the austenite is precipitated continuously, and the carbides are gradually keratinized, or the carbide keratinization is mostly formed during the sintering and slow cooling. The higher the forging temperature, the slower the cooling rate after forging, and the more severe the coarsening and horning of austenite grains and carbides. The sharp corners of carbides ，they are the focus of stress concentration and the source of fracture，which for early brittle failure of tool and die. Changing the distribution and morphology of carbides，it can extend the service life of the tool and die.

(3)

Imagine that if you stop after forging Cr12MoV steel, allow the austenite to recover and start to recrystallize, and then quench immediately, it can inhibit the growth of austenite grains, and also inhibit the re-aggregation and hornification of carbides. A relatively satisfactory carbide particle size and morphology can be obtained, which is the theoretical basis of the forging waste heat quenching process. If combined with appropriate firing times and forging ratios, we can explore the best forging waste heat quenching process scheme to obtain the effect of double refinement of carbides and austenite grains.

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

42crmo4 plate steel pre-hard nice thickness is under loading!

Today is another day! The rainbow comes after the rainy day. Although times seem a little hard amid the pandemic, it will pass just like a miss. As a member of Otai company, I want to share the update product news with you. That is, We have 42crmo4 plate steel pre-hard, the nice thickness is under loading! If anyone likes it, please let me know.

I want to talk about something interesting to you. the culture between china and the other china is really different. Just like china, most countries imitate measures we took to prevent the spread of the coronavirus. The prominent way is quarantine. What’s the difference when everyone is quarantined. In China, we are stuck at home, cook delicious food, watch TV, or play the TikTok. This is our daily life during the past two months. We even not dare to go out walking. We have to enjoy the quiet time at home until the government resumes the factory. We finally can enjoy a rich life.

However, the foreign country is totally different. They sing songs and dance at home, chatting with friends online or do exercise at home. Compared with the Chinese, they are outgoing. They think they should live as they want even during the quarantine time.

When we back to work, we find we are fatter than before. More interesting, everyone prepares the supper personally. We find our cooking skills are really improved a lot.maybe this is another thing we shall be thanked for during the hard times.

Otai company keeps the daily stocks for our customer, 42crmo4 plate steel pre-hard, the nice thickness is under loading! To serve the customers,we are fighting.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

Cr12MoV steel Six-sided forging

Cr12MoV steel Six-sided forging

Cr12MoV steel hexahedral forging,it refers to the combined process of three-way upsetting and drawing.

Each time,A certain forging ratio is required,it make the eutectic carbide gradually,it become irregular and uniformly distributed,or nearly uniformly distributed. Unidirectional drawing is a commonly used method in actual production. The carbides distributed in the network are forged into bands,and the carbides are also broken. This forging process is still feasible for long-axis workpieces, but it is also suitable for molds. In terms of anisotropy,when pulling in one direction,there is obvious anisotropy.Although large die blanks are sometimes forged reasonably,their central structure is still difficult to be significantly improved.

Thallium carbides are stacked in a network and carbides are stacked in a band

Rhenium carbides are randomly and uniformly distributed.The number of upsetting forgings shall be determined according to the specific circumstances, but shall not be less than three forgings and three forgings.

(1) Technical requirements for die forgings

Generally small precision molds with high toughness requirements require carbide unevenness levels of less than or equal to 2, general molds or large molds can be appropriately relaxed.

(2) The level of carbide unevenness in raw materials Cr12Mov.

If the level of carbide unevenness in the supplied steel is high, for example, the electroslag steel ingots that have not been bloom-rolled, the dendritic carbides are very developed and the level of carbide unevenness is high Therefore, it is necessary to repeatedly forge and forge. Even so, it is still difficult to completely change the carbide distribution by forging. For another example, although the large-sized steel used in large molds is rolled, most of the carbides in the center of the steel still remain in a networked distribution. For such large mold blanks, a reasonable six-sided forging must be carried out. Even so, the level of carbide unevenness is often difficult to be lower than 3 levels.

The carbides still have a more or less directional distribution even after a good six-sided forging, so it is necessary to consider that the long side of the mold should be consistent with the rolling direction in order to make full use of its higher longitudinal direction. The outer edge part of the metal with relatively uniform properties and carbide distribution, and the part with the largest hole type and wear, should avoid the center part with the worst quality of the blank as much as possible, because the carbide at this place is the easiest to homogenize.

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com