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P20 Mould Steel from Otai Special Steel in China . 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 Mould 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 Mould 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.

1. Supply Range of P20 Steel

Round Bar: diameter 200mm – 1000mm

Steel Plate: thickness 16-100mm x width 200-2000mm

Surface Finish: Black, Rough Machined, Turned or as per given requirements.

P20 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.

Ms Monica Yu

Mobile/WhatsApp: 0086-13711903397

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Monica@otaisteel.com

Today,a peer who is have similar business as ours,he brought a customer from other city,they mean to check our 42CrMo4 plate

Today,a peer who is have similar business as ours,he brought a customer from other city,for checking our 42CrMo4 plate.

They mean to check our 42CrMo4 plate,This company specializes in helping Guangzhou Automobile Factory equipment maintenance,all of their equipment comes from Japan.Previously, this customer purchased it locally ,while found that the materials did not meet the requirements.

Later, the customer took it to the inspection company and found that it was false.This customer is afraid of being deceived this time,so they drove 200kilometers to check our 42CrMo4 plate.At that time, the customers were very shocked ,when they walked into our warehouse. they saw that there are so many 42CrMo4 plates in our warehouse; and there are two delivery statuses.One is American standard 4140 pre-hardened, and the other is national standard 42CrMo4.

But this customer asked how can we prove that this material is true, we took out our testing equipment spectrometer immediately ,and showed the chemical composition.Because this customer has never seen a spectrometer before. He said that your company has such advanced testing equipment. I highly appreciate the quality of our company.

At last,We talked a lot about the chaos in the market,he told me it’s been cheated easily in steel market,most of the materials he couldn’t find before ,he search it on the Internet.but the result was terrible,as the 42Crmo4 plate he got was fake,that made him spend a lot of unjust money and delay production, fined by customers many times,He said that sometimes he felt particularly helpless,before he left,he said it’s so worth to drive 200 kilometers to come here.he said it’s hard to find a good tool steel company on internet,but this time,he thought he had found a good one,and so suitable for his company,and from now on,any kind of tool steel he need will contact us.and we can purchase for him.

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

Cold work steel mould is mainly used in the manufacture of blanking dies, stamping dies, cold extrusion dies and tensile dies. The main performance requirements for cold work steel mould are anti-wear performance, anti-bounce angle performance, high-temperature hardness stabilization ability, and good processability.

Common cold work steel mould currently on the market are as follows.
Low alloy cold work die steel, its representative models are: 1.2510, DF2, O1. The characteristics of this type of steel are: abrasion resistance, high temperature hardness stability is poor, but resistance to jumping angle is better. Because of its low cost, it is widely used in the production of cold-working molds with small batches. Such as thin-material single-stroke dies.
High-carbon high-chromium cold-working die steel. This steel type is the most common steel type in the market, also known as chrome steel series.Representative models are: Cr12, Cr12MoV, SKD11, D2. The characteristics of this type of steel are: wear resistance, high temperature and hardness stability. Due to the high nitrogen content, the steel structure after heat treatment contains a large amount of eutectic carbides, so the toughness is poor, that is, the anti-bounce angle performance is poor. It is widely used in cold-working molds with large production batches, which require high wear resistance but are lightly impacted. Such as: continuous punching die, punching die with low hardness.
High toughness and high wear resistance cold work steel mould. Because it is with excellent performance in all aspects. This steel has been collectively referred to as the universal cold work die steel in the market. The representative model is DC53. The characteristics of this type of steel are: the abrasion resistance is twice that of SKD11, the high-temperature hardness stability is stable, and the toughness is also twice that of SKD11, which means that it has good anti-bounce angle performance. It is mainly used for some cold work dies such as cold heading dies. Thick plate punching dies require both good wear resistance and high toughness. Such as: high-speed stamping dies, stainless steel stamping dies, stretching dies.

In short, different raw materials of cold work steel mould have different performance requirements.  But now the cold-work die steel market is crudely manufactured and fake and inferior. There are 5-7 quality grades of the same model. When purchasing cold-work die steel, it is very important to choose a reliable supplier. OTAI Special steel exported the special steel to more than 30 countries all over the world,and they are passed the standard of America, Germany and Japan.We are the very valuable and trustable supplier who supplied for the Thyssen Krupp and Chinese ordnance industry group.

Ms Phoenix Li

Mobile/WhatsApp: 0086-13925830813

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Phoenix@otaisteel.com

OTAI Steel specialized at steel industry over 20 years. OTAI export tool steel to more than 30 countries include Europe, North America, South American, Middle East and Asia. OTAI is stable and reliable  special steel supplier for Fortune 500 companies at home and abroad, such as Thyssenkrupp, China North Industries Group Corporation Limited. OTAI supply tool steel for US oil field giant and one military industry well-known enterprise. OTAI steel materials meet DIN / ASTM / EN / JIS etc different international standards.

Last article is about Ukraine customer who are satisfied with OTAI Steel price and quality, but insist get China steel mill, otherwise no order will be placed.

I tried to explain to him: OTAI Steel is professional special steel supplier, we are stock keeper, not big steel producer, also not a small trader. That means, our supply chain is our Core Competitive Advantage, make sure we can compete with market participants. We have many years’ experience in this field, we know who can provide good price and meanwhile good quality. This knowledge and experience is the most important thing for our company. What our customer need know is OTAI steel, OTAI quality. OTAI , as a professional special steel supplier, we take responsibility for the material we sell. We are not small trader, we keep stock in our warehouse, and we are special steel supplier above 20 years. We cannot survival if we do one-time transaction. OTAI control quality ourselves, our customer sign contract with OTAI, not China steel mill. OTAI take responsible for all material we sell. Besides steel mill inspection, we do second time inspection before delivery, include UT test, hardness test, chemical composition test and dimension measurement. You can come to our warehouse before container loading. We support third party inspection as well. Our material is stable, we keep stock from stable supplier. Sample quality is our quality. If you still have concern, you can start with cheap material, small order at first to start our cooperation.

Special Steel Supplier OTAI quality control

Ms Susie Li

Mobile/WhatsApp: 0086-13826999755

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Susie@otaisteel.com

SKD11 and D2 material originally belonged to high-carbon high-chromium cold-working die steel. It has good abrasion resistance and heat treatment micro deformation characteristics. Its heat treatment hardness is HRC59-61.

What are the differences between SKD11 and D2 material? Many people think that they are the same material. In Cold work die steel Cr12MoV is named for the so called “universal steel”. When you purchase Cr12MoV, SKD11, D2, some suppliers use commercial Cr12MoV instead and sell it to you at a lower price. When you use it, you find that Cr12MoV, SKD11, D2 these three materials have the same performance. You might think that there is no difference between SKD11 and D2 material.

The differences between them are as follows:
The place of birth is different. SKD11 is the general name of the Japanese Ministry of Industry. D2 material is the American mold steel grade, and the alloy composition is Cr12Mo1V1. However, the composition of SKD11 alloy produced in China is lower than the D2 material standard.
The resistance to high temperature softening is different. When high heat is generated by high-speed stamping, the hardness of SKD11 decreases faster. And the punch is more likely to be worn. For high-speed stamping dies, the wear resistance of D2 material is about twice than that of SKD11.
Abrasion resistance is different. Due to the different vanadium V content of the wear-resistant zinc alloy, D2 has better wear resistance than SKD11.
The hardenability is different. The hardenability of D2 material is higher than SKD11. D2 mold steel for large molds has more uniform core hardness and surface hardness.

OTAI company has maintained no quality incident complaints for 8 years continuously, and the customers repeat order rate is exceeds 85%. We supplied a lot of D2 material to different counties in different shapes, say flat bar, round bar and hexagon.We committed to being responsible for each order, and solving customer problems in the first time.

Ms Phoenix Li

Mobile/WhatsApp: 0086-13925830813

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Phoenix@otaisteel.com

OTAI Steel specialized at steel industry over 20 years. OTAI export tool steel to more than 30 countries include Europe, North America, South American, Middle East and Asia. OTAI is stable and reliable tool steel supplier for Fortune 500 companies at home and abroad, such as Thyssenkrupp, China North Industries Group Corporation Limited. OTAI supply tool steel for US oil field giant and one Asia military industry well-known enterprise. OTAI steel materials meet DIN / ASTM / EN / JIS etc different international standards.

OTAI Steel business partner in China

OTAI Steel keep high level tool steel stock, meanwhile have strong sourcing ability in China. OTAI’s main tool steel supplier include Bao steel, Shougang, Valin Steel, Sino Steel, Xingang Steel, SD steel. etc. Most of our material directly from China top 10 worldwide famous steel mill.

Ukraine tool steel supplier story

This customer is professional tool steel supplier in Ukraine. They supply tool steel both Ukraine and other former Soviet states. They work on government bidding project as well. Their purchasing manager Mr Alex sent inquiry about O1 tool steel, AISI 420 stainless steel, and China standard Cr12MoV cold work tool steel half a year before. Mr Alex felt OTAI Steel price was very attractive, and asked samples for inspection. The samples were tested by national laboratory in Ukraine.

One month later, sample test results come out, both chemical composition and mechanical properties data is good. This moment, I have great confidence this company will become our new customer, price is competitive and quality meet their requirement, next step must be a trail order to start our business.

However, Alex sent an email, ask me provide our tool steel supplier name and MTC of original manufacturer, and told me this is their company policy, they could not buy material with “no brand”.

Actually, this is impossible for our company. As a role in the market, both customer and supplier information is commercial secret.

To be continued……

Ms Susie Li

Mobile/WhatsApp: 0086-13826999755

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Susie@otaisteel.com

D2 tooling steel -Chapter 5

CHAPTER 5 OTHER FEATURES

Sometimes features added to a blade for user convenience, like friction grooves on the blade spine, can create stress risers that negate the resistance to blade breakage of zone-edge hardening. Sometimes different production lots of steel exhibit different reactions to zone hardening due to allowable fluctuations in chemical composition. User discretion is the single most predictable way to avoid blade failure from lateral flexing. D2 is probably not the best choice of steel to make sharpened pry bars from, even with zone-edge hardening.

The downside to the nano-grain of the friction-forged edge is it exhibits less “tooth” for reduced cutting efficiency while carving materials like plastic and seasoned wood. Since the first four knives produced by Diamond Blade were primarily hunting knives for processing harvested game, rather than bushcraft, this is probably not a significant issue to Diamond Blade knife users. The knives can cut more meat and hide between sharpening, as only the “best of the best” can.

BUSHCRAFT AND UTILITY KNIVES

For bushcraft and utility applications, I would choose a D2-bladed Knives of Alaska model from this sister company which is also run by Diamond Blade’s managing partner Charlie Allen. The KOA D2 blades are conventionally heat treated, double-draw tempered and cryo-treated for remarkable performance in their own right. They just don’t match the Diamond Blade for overall cutting endurance between sharpening.

Yet another way to produce knife blades out of D2 steel alloy is by casting the blade blank out of molten D2 steel. The blank is then finish-ground and heat treated to individual specifications. Selected handle materials help to create each cast blade into a distinctively individualized knife.

Cast D2 is sometimes called Dendritic D2. The proponents of this production method believe the steel grain of the blade has more predictable properties from casting, then what can be attained with other methods. They claims to have more consistent carbide structure at the blade edge and longer cutting endurance. Of course edging, alloy content and final heat treatment still play a dominant role in determining the performance of each finished knife, regardless of steel production or blade-creation methodologies.

D2 is not an alloy used for forged knives with any frequency. The steel is difficult to move with a hammer and prone to decarburizing when it’s heated high enough for easier metal movement. D2 is occasionally incorporated into Damascus blades, but there have been problems with some D2 Damascus experiencing de-lamination of the layers under lateral stress.

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com

AISI 4140 stock promotion from Otai Special Steel . Annealed , Black surface original board , T45 / 95 / 100 *W2250*L5000-12000MM , T19 / 31*W2230*LMM , T39*W2260*LMM , Total weights : 50Tons , limited stock for sales promotion in one week , the price RMB1800.00 Yuan less than before per ton , very competitive cargoes , end of sales .

AISI 4140 stock promotion . AISI 4140 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 . AISI 4140 Annealing delivery hardenss less than 250HB .

AISI 4140 stock promotion . AISI 4140 Alloy steel material stockholders and suppliers from China-OTAI SPECIAL STEEL . we have more 16 years experience in 4140 steel plate, round bar, flat bar, square supply.AISI 4140 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 AISI 4140 alloy steel .

Chemical Properties
The table below highlights the chemical composition of AISI 4140:

C                      Cr                        Mn                 Si                   Mo                   S
0.38-.43%      0.80-1.10%     0.75-1.0%    0.15-0.30%    0.15-0.25%   0.040%

P                          Fe

max 0.035%     max Balance
The addition of chromium and molybdenum promotes corrosion resistance. The molybdenum can be particularly useful when trying to resist corrosion due to chlorides. The manganese in AISI 4140 is used to increase hardenability and as a deoxidizer. In alloy steels, manganese can also combine with sulfur to improve machinability and make the carburizing process more effective.

AISI 4140 stock promotion . AISI 4140 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 Monica Yu

Mobile/WhatsApp: 0086-13711903397

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Monica@otaisteel.com

A2 tool steel is an air-hardening, cold work steel. A2 is a 5% Chromium steel which provides high hardness after heat treatment with good dimensional stability.

Do you know about A2 tool steel? There are many common used steel in our company, like 4140,8620,etc.maybe you are not familiar with a2 steel, A2 Tool Steel is a versatile, air hardening chromium alloy tool steel that replaces O1 tool steel when safer hardening, less distortion and increased wear resistance are required.

 A2 tool steel is an air-hardening, cold work steel. A2 is a 5% Chromium steel which provides high hardness after heat treatment with good dimensional stability. It is heat treatable and will offer a hardness in the range 57-62 HRC.

Our otai company can supply the a2 steel, we have a customer who is knife stockist in Asia, they produce the different knives made of steel, but the knife made of a2 steel is most appreciated, he purchased the a2 steel from our company every year. We paid a visit with the customer in September, we knew most people bought the knife for wood carving, food preparation, cleaning fish and possibly wilderness survival.

Characteristics of A2 tool steel 

1good machinability,

2high compressive strength,

3high dimensional stability after hardening and tempering.

4Good hardenability, very good non-deforming properties, deep hardening,

5Good wear resistance, AISI A2 tool steel takes a place between AISI O1 and AISI D2, offering an excellent combination of good wear resistance and toughness. 

Applications 

Typical Applications for  A2 tool steels materials: Blanking dies, block and ring gauges, coining, cold forming, cold trimming and forming dies, cold shears, rolls, knurls and knurling tools, machine parts, mandrels, punches and punch plates, reamers, shear, and slitter blades, stamping dies and threading tapes.

Company History

Otai Steel supplies a wide range of carbon, alloy, and stainless steel products, including high-speed tool steel, cold works tool steel, hot works tools steel, plastic mold steel, engineering steel and machine structural steel, etc. After almost 20 years of development and growth, Otai Steel becomes one comprehensive special steel factory, stockist and exporter. Combined with the experienced exporting team and professional technical knowledge, Otai Steel offers both technical advice and support, as well as global professional steel solution and service.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

In mold steel business, you know what kind of customers are right for you. If you find yourself unsuitable, you can reject it frankly.

In mold steel business, you know what kind of customers are right for you. If you find yourself unsuitable, you can reject it frankly.

one of the fortune 500 companies contacted us, They wanted to find a company that could provide the mold steel for common requirements, and also accepted a long payment time.

In the past, I would try to cater to customers,a opportunities for cooperation with large companies,most people must fight hard for this chance. Now I think that the type of required by their company does not match our superior products. Terms of payment are even more unacceptable.

First of all, our target customers are who have requirements for the quality mold steel, not all mold manufacturing enterprises. we focus on 8 type mold steel products to meet a small number of customer needs. Such as:

• H13,which meets the long-life aluminum die-casting mold.it perfect

For the aluminum extrusion factory, metal extrusion molds that can be used longer.

• 2738,higher quality plasticmold steel
• 4140for some auto industry.

In my opinion, there are thousands&thousands of customers demand mold steel ， and there is no need to deliberately force a certain customer. If it’s not fit for you, no matter how big the company is, it doesn’t matter to me. Meeting a small number of customer needs is enough for me to live comfortably. It is not necessary to change the company’s positioning for a certain customer.

If you want to know more about H13,1.2738,4140,please contact me,I am sure there must something I could help with,as I had work in Otai special steell company  3years,and this company have 20 years experience of mold steel & tool steel. Otai special steel start with domestic mold steel & tool steel business since 1999,and we have solve many problem for our customer,no matter 4140 tool steel or H13 hardware extrusion mold steel or 1.2738 plastic mold steel,we sure will offer a suitable one for you.

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com