Category Archives: Blog

AISI 4140 Steel Summary for Otai Special Steel in 2019 , this year we sold out AISI 4140 Steel sheet plate and round bar total in 6000 Tons , the customer from Argentina , UAE , Pakistan , Bulgaria , Kuwait , Ecuador , Portugal , Chile , Southeast Asia , Turkey and so on . And other high speed steel , cold tool steel , hot tool steel and carbon steel and other special steel may arrived to 1000 Tons . In the new year 2020 , Otai Special Steel will continue to work hard to ensure that all special steel stocks are sufficient to meet the requirements of all customers , and strive to achieve another level of sales next year and win-win with customers .

AISI 4140 Steel Summary for Otai Special Steel in 2019  AISI 4140 Alloy Steel | 1.7225 | SCM440 | 42CrMo4

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.

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.4140 Annealing delivery hardenss less than 250HB.

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.

AISI 4140 Steel Summary for Otai Special Steel in 2019 . That is why Otai Special Steel could sold out as much as more AISI 4140 steel to any country all over the world , and why the customer trust us and want to get the win-win business relationship with us , So why do you not consider working with us from now on ?

Ms Monica Yu

Mobile/WhatsApp: 0086-13711903397

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Monica@otaisteel.com

A2 Steel,How to get the real A2 Steel from China?

A2 Steel

A few days ago, a customer who always bought 42CrMo form our company,the boss is specialized in for automotive molds, he asked some question about the mold steel of A2 Steel.During the conversation, I found that the customer did not know this material at all, he only notice that the foreign customers designated A2 Steel, and he was very cautious. He also asked a lot of mold steel stockist. Some of them sold mold steel at very high prices, and some of them did n’t know what is it. Before, he bought 42CrMo steel from other suppliers, the price of that fake material was also 30% higher than us.OTAI Special Steel Company sold 42CrMo without any quality problems,so he trust our company more since he work with us, and once again asked us about the situation of it.we told customer that you asked the right person this time. We are very familiar foreign mold steel standards,and you will never come to grief.

We explained to customer that because A2 Steel is the American standard mold steel, our country does not completely correspond to mold steel,if it’s good for him,we could offer some suggestion of mold steel which could be replaced.

The steel you got from others before was fake . At present, there are very few manufacturers in China, they are able to produce A2 Steel ,and the standards according to American standards. Only a few of my export companies have customized this mold steel,they according to the American standard A2 Steel standards, so those who you asked before,which sell molds. It ‘s made sense that, most of the company offered e a random quote to you. After hearing it,our customer realized why he got so much trouble of it before. Finally, the customer were so kind,and said he wish he could knew us earlier, asked their to purchaser to give A2 Steel to us.

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

Otaisteel is a stable and reliable supplier for fortune 500 companies at home and abroad, such as Thyssenkrupp, china north industries group corporation limited. Otai exports various tool steel and alloy steel to more than 30 countries from Europe and American, Middle East, and Asia. Our steel materials meet DIN/ ASTM/EN/JIS etc different international standards.

Product description

4CR5MOSIVtool steel is a high quality Hot work tool steel, and it belongs to the high quality high carbon alloy tool steel. It’s mainly used for forming extrusion dies. Typical applications include casting molds aluminum, magnesium, zinc, copper and aluminum extrusion dies, liners, spindles, pressure pad, followers, pad, die, the death and the adapter ring copper and brass extrusion. Moreover, 4CR5MOSIVtool steel is used to produce hot stamping and extrusion die forging, thermal upsetting dies, jigs mold, hot embossing, punching, trimming tools. Other applications include plastic molds, shear blades for heat and hot extrusion dies.

customer story

We have a customer from India, which is a company that makes molds. This customer previously purchased 42crmo from our company, but he wanted to purchase 4CR5MOSIVtool steel due to the needs of the business, I learned the customer’s needs through communication with the customer, and told the customer  We also make 4CR5MOSIVtool steel, The customer was surprised. Considering that they never purchased 4CR5MOSIVtool steel from our company, The customer was a bit worried about quality issues. We told the customer that we purchased Raw material from a well-known steel factory in China, and our 4CR5MOSIVtool steel is exported to South America and Europe, and if you are not assured, we can also mail samples to you. The customer saw that the 42crmo products we worked with were also good, so they finally tried to purchase 4CR5MOSIVtool steel from our company. The customer expressed satisfaction after receiving the goods.

In order to give back to the old customers, the company is now doing special sales activities, 4CR5MOSIVtool steel has a very favorable price, delivery time is 5 days, and the inventory is rich. we have our own Chemical Spectrometer, Ultrasonic and hardness tester. If you have any needs, please contact me at speed!

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’s 42CrMo4 special steel is produced by the only one imported advanced steel making equipment. Welcome to send an email to us.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

Since being affected by flying swine fever, the price of pork in China is still very high. Interestingly, the price of pork can be compared with high speed steel, May even be more expensive than high speed steel price.

Otaisteel is a stable and reliable supplier for fortune 500 companies at home and abroad, such as Thyssenkrupp, china north industries group corporation limited. Otai exports various tool steel and alloy steel ,to more than 30 countries from Europe and American, Middle East, and Asia. Our steel materials meet DIN/ ASTM/EN/JIS etc different international standards.

Since being affected by flying swine fever, the price of pork in China is still very high.

Interestingly, the price of pork can be compared with high speed steel, May even be more expensive than high speed steel price. The reduction of Chinese pigs also affects other countries. China pork crisis prompts German sausage fears，a sharp drop in Chinese pork production has prompted Germany’s meat industry, to warn of possible shortages at home, with price rises being passed on to the country’s sausage connoisseurs.

The Federal Meat Industry Association (BVDF) has sounded a “schnitzel alarm”, as the spread of the deadly African swine fever,it  has seen half of China’s pig population slaughtered ,and triggered a bidding war among meat importers worldwide, according to the Bild tabloid.

The BVDF says Chinese companies are also buying up large amounts of meat abroad to make up for shortfalls at home, and this is “adding up to significant demand on the world pork market”.China says it will also release more pork from its central reserve, in a bid to keep prices in the shops manageable ahead of the Lunar New Year next month, but the BVDF says German consumers will not be so lucky. African swine fever has spread throughout China, which accounts for almost half of all pork produced worldwide, and market analyst Tim Koch,he told Bild the epidemic will have a “knock-on effect on global prices for years to come”. It seems that the price of high-speed steel is not expensive.

Introduction of Otai Steel

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’s 42CrMo4 special steel is produced by the only one imported advanced steel making equipment. Welcome to send an email to us.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

The 4340 chromoly steel has high strength, high toughness and good hardenability, it is used to manufacture important quenched and tempered parts.

4340 chromoly steel has stability against overheating, but has high white point sensitivity, tempering brittleness, and poor weldability of steel. It needs high temperature preheating before welding and stress relief treatment after welding. Generally used in the quenched and tempered state, it can also be used as ultra high strength steel after low temperature tempering or isothermal quenching.

4340 chromoly steel is used to manufacture important quenched and tempered parts. That require good toughness, high strength and large size, such as heavy-duty shafts. It could bear high loads, steam turbine shafts and blades with a diameter greater than 250MM. It can also be used for rotor shafts and blades with operating temperatures exceeding 400 degrees. In addition, it can also be used to manufacture important parts with special performance requirements after nitriding treatment. Heat treatment specifications: quenching at 850 ° C, oil cooling; tempering at 600 ° C, water cooling, oil cooling.

Few days ago, one customer asked me what material 4340 chromoly steel is. I explained to him that it belongs to the following CrNiMo series steel of the American Standards Association. It is mainly used in petroleum equipment. Above, the material is basically similar to the 40CrNiMo GB series of our national standard, but there are differences in composition. The main difference is in Ni. In China, many unscrupulous counterparts use 40CrNiMo instead of 4340 chromoly steel. From the points of standards, it is not workable to do like this. That is because 4340 chromoly steel is completely different in composition from 40CrNiMo. In addition, it is mainly used for petroleum equipment. If there is a problem with the material, it will cause great losses to the company.

Therefore, if you are purchasing such steel material, it is necessary to find the professional and reliable supplier. Our OTAI specializes in exporting special steel to more than 30 countries in the world. We have rich and expert on this special steel field. The world ’s top 500 steel companies, also purchased the special steel from us.

Ms Phoenix Li

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Phoenix@otaisteel.com

Some customer would like to know how to distinguish DC53 of true and false, before answering this question, firstly，let’s check the DC53 alloy chemical alloy composition,

Some customer would like to know how to distinguish DC53 of true and false, before answering this question, firstly，let’s check the DC53 alloy chemical alloy composition,

DC53 steel

Some customer would like to know how to distinguish DC53 steelof true and false, before answering this question, firstly，let’s check the DC53 steel alloy chemical alloy composition, the real DC53 steel alloy composition is Cr8Mo2VSi, based on this standard,let me introduce two kinds of testing method,  testing DC53 steel  chemical composition, contrast is Cr8Mo2VSi, if not, it is surely not DC53 steel material, sparks detection,, and heat treatment factory generally adopts the spark test, but to distinguish the DC53 steel quality is not easy, the result will be told by the end use. Or unless you do metallographic structure analysis, otherwise no one could tell the difference.

If you want to know more,please click the link,or check as below

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 steel as your requirements size. DC53 steel 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 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.

Related Specifications JIS G4401 (2000) DC53 tool steel

DC53 steel Form of Chemical composition

DC53 Form of Supply

For Cold work tool steel DC53, we can supply the steel round bar, steel flat bar, steel sheet, plate and square block. DC53 tool steel round bar can be sawn to your required length and size. Rectangular steel 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.

Ms Sharon Wan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

I am here to say hello to everyboby who will see this website page , this is Monica Yu from Otai Special Steel , we are specialized in produce High speed steel M2 , Hot and Cold work tool steel , Plastic mold steel , Quenched and tempered alloy steel 4140 , Carbon steel , Bearing steel and Gear steel for 16 years , 4140 / M2 from Otai Special Steel , all our productions are suitable for a variety of applications , know more about our company and production , please log in our website : www.otaisteel.com , hope we will have chance to co-operation with each other in the future , thanks !

I want to tell you story about Otai Special Steel with me , i have working for this steel company from 2013 , and till now have more than 6 years , for these years , 4140 / M2 from Otai Special Steel , i get the customer from Argentina , Ecuador , Bulgaria  , Kuwait  , Indonesia …… , and they purchased any kinds of special steel like : 1020 / 1045 / 4140 / 8620 tubes and 4140/1.2311 / M2 / 65Mn / Cr12Mov / 34CrNiMo6 ….. sheet plate and round bar and flat bar and Specification material from us , when they finished the first time purchase , i always ask for them to get the situation after use , and sometimes they may did not know how to use them in the best way , but after cocommunicate with each other , we try our best to come to an agreement and make full use of the materials finally , and for the first time, a good experience , the customer may have repeat order to us again about their purchasing cycle .

It’s in the other place , i may care for the regular customer for the details from life , my customer from Argentina have twin baby last years , and for this Oct. he have visited our company for the every year regular action , (last year his elder brother and his father visited us ,) and they take the Homemade red wine to me for gift , and i prepare the Lego blocks for his two baby , we are all very happy to get the present from each other , after he came back to home , he may send the picture to me , that is his baby are very happy playing with my gift , that is say the business not only to the production , 4140 / M2 from Otai Special Steel , we could bring it to our life also . You may found happy from anywhere .

Fax: 0086-769-88705839

Email: jack@otaisteel.com

AISI 1045 steel / JIS S45C / DIN CK45 Carbon steels

AISI 1045 steel / JIS S45C / DIN CK45 Carbon steels

Chinese Carbon steel price in 2019 # We made a graph of cabon steel price (C45 /S50C ) according to the price record of hot rolled carbon steel plate price from Jan-2019 until Nov.,we can found the info from graph that Chinese carbon steel price goes up and down between 636 -551 USD /TON .

JIS S45C steel is a kind of medium carbon steel design need more intensity and hardness can function. The steel has excellent dimensional accuracy, concentricity and straightness, common to reduce wear in high speed applications. it can form turned, ground and polished, can be processing asymmetric finite deformation.

JIS S45C STEEL

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com

AISI 1045 steel is an American standard, which corresponds to Chinese steel brand 45 # steel.

About AISI 1045 Steel

AISI 1045 steel is a high-quality carbon structural steel, corresponding to Japanese standard S45C, German standard C45. It is characterized by higher strength and deformation resistance than ordinary A3 steel. The cold plasticity of this carbon steel is generally better in annealing and normalizing than in Q+T. It has higher strength and better machinability. After proper heat treatment, certain toughness, plasticity and wear resistance can be obtained. This material sourcing is very common and very convenient for purchasing.

Usually, the AISI 1045 steel applications and attention tips are as following:
1) It is suitable for hydrogen welding and argon arc welding, not very suitable for gas welding. Pre-heating is required before welding, and stress relief annealing should be performed after welding.
2) Recommended heat treatment temperature: normalizing 850, quenching 840, tempering 600.
3) It should not be heat treated by carburizing and quenching.
4) AISI 1045 steel is a high-quality carbon structural steel, which is not high in hardness and easy to be machined. It is commonly used in molds for templates, tips, guide posts, etc., but heat treatment is required.
5) It is qualified after quenching and before tempering, and the hardness is greater than HRC55 (up to HRC62). The highest hardness in practice is HRC55 (high frequency quenching HRC58).

We are the very valuable and trustable supplier who supplied for the Thyssen Krupp and Chinese ordnance industry group and well got the firm trust from the overseas customers. Therefore definitely, the customer placed the repeat order very frequently, one month ago, the customer from South America placed the AISI 1045 steel order to us again, and yesterday we just finished the loading goods and delivery. Hereby, I would like to say much appreciated for the customer’s long and firm trust to our OTAI company, thanks for your always support and loyalty to make us to be better and better on the STEEL road. And what we can return to our dear customers is the quality and our best and sincere service.

Ms Phoenix Li

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Phoenix@otaisteel.com

AISI 4140 Alloy steels are designated by AISI four-digit numbers and comprise different kinds of steels, each with a composition which exceeds the limitations of B, C, Mn, Mo, Ni, Si, Cr, and Va set for carbon steels.

AISI 4140 alloy steel plate is a chromium-, molybdenum-, and 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 . AISI 4140 alloy steel has good machinability in the annealed condition. AISI 4140 alloy steel has high ductility. It can be formed using conventional techniques in the annealed condition. It requires more pressure or force for forming because it is tougher than plain carbon steels. AISI 4140 alloy steel plate can be welded using all conventional techniques. However, the mechanical properties of this steel will be affected if it is welded in the heat-treated condition, and post-weld heat treatment should be performed.

Ms Monica Yu

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Monica@otaisteel.com