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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

OTAI company specializes in providing AISI 1045 carbon steel

OTAI company specializes in providing AISI 1045 carbon steel

OTAI Company specializes in providing AISI 1045 carbon steel. AISI 1045 carbon steel is exported in large quantities in China, mainly due to the large production volume of AISI 1045 carbon steel, affordable prices, short delivery times, and large stocks of AISI 1045 carbon steel on the market. The AISI 1045 carbon steel sold by OTAI Company is generally black-skinned and hot-rolled, and it can be delivered to the same day, and it will be issued within 24 hours.

AISI 1045 carbon steel can also be called C45, S45C, 1.1191 and other grades. The grades of steel are similar to our license plates. Steel grades in most countries are composed of numbers and letters. AISI 1045 is composed of 4 numbers plus the country. Speaking of the AISI 1045 brand, I am particularly impressed because the first product I sold in the special steel industry was AISI 1045 carbon steel.

AISI 1045 carbon steel Because his price and inventory are more, as a novice, he can only try to sell it. Fortunately, my first customer asked for a cabinet of AISI 1045 round steel. Therefore, every time I see AISI 1045, I am particularly happy, because I automatically default to AISI 1045, I love 1045, and an order will come soon. Hahaha ~ Gradually I found that I really fell in love with the AISI1045 steel type, because the other one was called S45C, which happened to be the choreography of my community. Every time I bought AISI 1045, I felt happy, because I Can go home to sleep.

AISI 1045 carbon steel is a material that we specialize in selling. OTAI has a certain historical experience in making special steel in this industry. Our boss started a business by pulling a cart of steel with a bag and going from door to door. Run to sell, we have today-Dongguan OTAI Special Steel Company. Today, OTAI Special Steel Company is a leading player in South China. We not only shoulder the historical mission of selling Chinese special steel to the world, let the world understand the spirit of our OTAI boss selling steel, but also let the world understand the entire Chinese steel industry. Great power. We speak with quality and service, and today Dongguan OTAI Special Steel Co., Ltd. enjoys a good reputation. As one of them, we must not forget our mission and purpose.

Having said that, I think that if you are reading the article, you will definitely be interested in our Dongguan OTAI Special Steel Co., Ltd. We must uphold the product quality and service to provide you with professional steel technical support.

AISI 1045 is widely used in aerospace, power, petrochemical, marine, machinery, electronics, environmental protection and other industries.

If you are not sure whether the steel you want to use can be AISI1045, you can check the official website of Dongguan OTAI Special Steel Co., Ltd .: www.otaisteel.com.

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com

AISI 4140 steel is a low alloy steel containing chromium, molybdenum, and manganese. It is widely used across numerous industries and is an excellent material choice due to its toughness, high fatigue strength, and abrasion and impact resistance. Not many grades can match the versatility and usefulness of 4140. Otai Special Steel provide AISI 4140 plate and round bar in any size always .

How is AISI 4140 Steel Made?
AISI 4140 is made by placing iron, carbon, and other alloying elements into an electric furnace or oxygen furnace. The major alloying elements added to AISI 4140 are:

Chromium
Manganese
Molybdenum
Once the iron, carbon, and other alloying elements have been mixed together in liquid form, it is allowed to cool. The steel may then be annealed; possibly several times.

After the annealing is complete, the steel is heated to a molten phase again so that it can be poured into the desired form and can either be hot worked or cold worked through rollers or other tools to reach the desired thickness. Of course, there are other special operations that can be added to this to reduce mill scale or improve mechanical properties.
Mechanical Properties of 4140 Steel
AISI 4140 is a low alloy steel. Low alloy steels rely on elements other than just iron and carbon to enhance their mechanical properties. In AISI 4140, additions of chromium, molybdenum, and manganese are used to increase the strength and hardenability of the steel. The additions of chromium and molybdenum are why AISI 4140 is considered a “chromoly” steel.

There are several important mechanical properties of AISI 4140, including:

Tensile Strength: AISI 4140 steel typically has a target ultimate tensile strength of around 95,000 psi.
Toughness
Ductility
Hardenability
Chemical Properties
The table below highlights the chemical composition of AISI 4140:

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

Ms Monica Yu

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Monica@otaisteel.com

OTAI offer AISI 4140 round bar, size up to Φ500mm, daily stock 800 tons. OTAI professional technique proposal and one stop service help save cost over 20%.

OTAI Steel, help you save cost over 20%

OTAI Steel focus on special steel industry over 20 years, become one of leading special steel stockist in South of China. AISI 4140 round bar is main products for OTAI Special Steel. We keep high level stock both AISI 4140 round bar and AISI 4140 steel plate. OTAI work together with China main special steel, can offer our customer competitive price, quickly shipping time, and professional technique proposal. Not only save cost for distributors, but also save more cost for end user because we commend the most suitable products for our clients. OTAI offer AISI 4140  round bar not only regular size, but also big diameter 4140 round bar and small diameter 4140 round bar. Almost all size we keep stock to support customer different requirement. We also provide one station service, include heat treatment service, machine service include turned, peeled, polished, cutting for AISI 4140 round bar. Clients can solve most their questions from us. One station service help customer save transportation cost and time. Generally speaking, we help customer save cost over 20%.

Mexico customer story

We have a customer from Mexico, have great interesting about OTAI Steel AISI 4140 round bar, because our price is much cheaper than their currently supplier.

This customer need big diameter AISI 4140 round barΦ400mm, Φ450mm, Φ500mm, and require quickly delivery time. Generally speaking, it is difficult for them to find stock for such big bar, but we keep stock, and have very good price.

The customer do not work with us before, do not trust us even provide SGS report, material specification report. I quite understand him. If I am an international purchaser, I will think the same way. He asked whether we have customer who purchase AISI 4140 round bar from OTAI Steel in reliability. He need check our reliability with them.

We do have customers in Mexico. I understand him also, but can not do this. I told him: I am really sorry we can not tell you their company name, because we have sign contract we can not leak out their commercial secret. If you buy AISI 4140 round bar from OTAI, you also do not want your competitors know where your material are from, and who is your supplier. Hope you can understand. If we have the honor work with you in future, we will also keep your information in secret.  OTAI have a lot of customer in Argentina, Chile, Peru, Ecuador, Mexico and Columbia each year. Latin America is very important market for us. We are looking forward become your new partner in Mexico as well.

Customer finally understand us, and have a plan to visit us during his stay in Shenzhen for expo, then he can visit our office, and our warehouse. He can see all material he have interesting in our warehouse, and our machine, work flow, and testing process before delivery. Hereby we declare we won’t leak out commercial secret for all our customer. Please do not worry.

Ms Susie Li

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Susie@otaisteel.com

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 .

2019 Carbon steel price record :

According to the graph of C45/S50C hot rolled carbon steel price  ,we can know the follow info :

In 2019 ,C45/S50C  steel price goes up and down between 636 and 551 USD per ton  .

In the Q1,2019 ,Carbon steel price kept going up .EXW price from 590 USD per ton up to 619 USD per ton on March .

In the Q2,2019 ,Carbon steel increased at EXW 637USD per ton on April ,and during May until June ,the price stable at 637 USD per ton .

In the Q3,2019 ,Carbon steel price continues fall from 637 USD to584 USD per ton .

In  the Q4,2019,Carbon steel price price kept going down 551 USD per ton ,the price hit the bottom in 2019 .and price began to rebound in Novenber until now .

The reason of carbon steel price go up during Q1 & Q2:

1. The amount of social funds is abundant, and the ferrous metal (CARBON STEEL) has attracted so much attention from market.

2.The inventory quantity of carbon steel at the market on Q1 is smaler than before ,all the manufacturer & Stockist & Distributor sell out their inventory for cash before Chinese new year 2019 .

3. Society expects the demand for construction sites will better during Q2 , and many stockist stock up a lot ,and waiting to sell by better price in Q2

4. A new round of environmental protection policies announced at the end of 2018 is being implemented, and market expectations are beginning to change.

We will continue our discussion of  Q3&Q4  carbon steel price  information next blog .

Ms Elwa Lee

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Elwa@otaisteel.com

1.2344 ESR steel

Some friends asked me that any kind of steel would be same as 1.2344 ESR steel ,I thought H13 steel would be almost same as 1.2344 ESR steel

1.2344 ESR steel

Some friends asked me that any kind of steel would be same as 1.2344 ESR steel ,I thought H13 steel would be almost same as 1.2344 ESR steel,I also discussed with some heat treatment factories engineers,they told me that both 1.2344 ESR steel and H13 steel processing of heat treatment are also almost same.For this kind of understanding,what I have to say is:don’t deem anything as our limited understanding,because of the “almost same”,it made us be disadvantage fooled many times,but we were never able to found the reason of been disadvantage fooled,though 1.2344 ESR steel and H13 steel are both belong to the hot work tool steel,but because different purification processes,different forging processes,different annealing processes,different test standard,the die steel will obtain difference result of the high temperature resistance、softening properties、wear resistance、crack resistance、toughness.

If you want to know more about the 1.2344 ESR steel,please click the link or see as below.

Related Specifications DIN 17350-1980

Chemical composition

Form of Supply

1.2344 tool steel, we can supply the round bar, flat bar, plate 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 can be supplied, providing a quality precision finished bar to tight tolerances.

Applications

1.2344 Tool Steel is used in die casting dies for aluminium, magnesium and zinc, extrusion dies for aluminium and brass, liners, mandrels, pressure pads, followers, bolsters, die cases, die holders and adaptor rings for copper and brass extrusion. It is also for plastic moulds, shear blades for hot work and hot swaging dies. 1.2344 is also used in the production of hot stamping and press forge dies, split hot heading dies, gripper dies, hot punching, piercing and trimming tools.

Regular size and Tolerance

Ms Sharon Wan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

D2 steel can be used in: stamping or forming dies, punches, forming rolls, knives, scissors, cutting machines, etc.

About D2 die steel

D2 die steel is an air quenched, high carbon, high chromium tool steel. It has high abrasion resistance and abrasion resistance. After heat treatment, the hardness can reach 55-62HRC, and it can be processed in the annealed state. D2 die steel hardly deforms when properly hardened. The high chromium content of D2 gives it mild corrosion resistance under hardened conditions.D2 die steel first appeared during World War II and belongs to the non-stainless steel category, semi-stainless steel tool steel. Today, D2 is very popular with tool manufacturers, knife-makers and tool factories, and almost every tool manufacturer uses D2.

D2 die steel is sometimes called “semi-stainless steel”. It has a fairly high chromium content (12%), but this number is not enough to classify it as stainless steel. However, it is more resistant to staining than some other carbon steels and has excellent wear resistance. D2 is much stronger than high-quality stainless steel such as ATS-34, but not as strong as other non-stainless steels mentioned here. Good abrasion resistance, almost no rust, and good toughness. These combined make D2 an ideal choice for a variety of tools.

Our OTAI exported this D2(1.2379/X12MF) steel material to most of Knives manufacturers end buyer so far, and got the firm trust from them. Our company has maintained no quality incident complaints for 8 years continuously, and the customers repeat order rate is exceeds 85%. As what our company goal showed, we undertakes that as a crucial company strategy… Taking on an open, transparent and sincere attitude, we are willing to work with all customers and partners to jointly supply top quality tool steel everywhere.”
Therefore, based on this, OTAI supply the steel materials to more than 30 countries all over the world.

Ms Phoenix Li

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Phoenix@otaisteel.com