Category Archives: Blog

AISI 8620 Steel is a low alloy nickel, chromium, molybdenum case hardening steel, as a common, carburizing alloy steel, it is more responsive to mechanical and heat treatments than carbon steel. This alloy steel is flexible during hardening treatments, thus enabling improvement of case/core properties. Generally speaking, AISI 8620 steel is supplied in the rolled condition with a maximum hardness HB 255max. AISI steel 8620 offers high external strength and good internal strength, making it highly wear-resistant.

Chemical Composition

The following table shows the chemical composition of AISI 8620 alloy steel.

AISI 8620 Steel is suited for applications that require a combination of toughness and wear resistance. AISI 8620 steel material is used extensively by all industry sectors, for example, manufacturing the engine of the tractor and the small –and medium-sized vehicles.

Typical applications are: Arbors, Bearings, Bushings, Cam Shafts, Differential Pinions, Guide Pins, King Pins, Pistons Pins, Gears, Splined Shafts, Ratchets, Sleeves .because the 8620 steel contains Molybdenum, so it shows good combination properties and heat resistance. One of our clients from Malaysia imported our 8620 steel in order to make the gear of the automobile.

Dongguan Otai Special Steel Co Ltd  Based on the industrial City of Dongguan, in Guangdong Province, China, our premises are 8000m2 and have the capacity to store/produce 2000 tons of steel at any one time. We expand our market worldwide, we expect you to join us .we are proud of our powerful, modern machinery. Precision engineering – our 20 years experience in the steel industry means the quality we provide is world-class and Otai Steel becomes one comprehensive special steel factory, stockist, and exporter. Welcome to request a quote.

AISI 1045 steel is a medium carbon, medium tensile steel supplied as forged or normalized. This steel shows reasonable strength and toughness. AISI 1045 steel is characterized by good weldability, good machinability, and high strength. AISI 1045 steel is a versatile medium carbon engineering steel that can be hardened, as well as being flame or induction hardened.
This grade of steel is widely used for axles, bolts, forged connecting rods, crankshafts, torsion bars, light gears, guide rods, metal furniture, metal equipment, building machinery, electrical equipment, etc. one of our clients from India bought the AISI 1045 steel from our company, in order to make the automobile parts .the application of the AISI 1045 is widely arranged, welcome to connect with us if you are considering to buy it. I think you will be satisfied with our company.

Iron is the main part of 1045 steel. However, it does contain certain other elements within a specified range. The first element is carbon, with a range of 0.43 percent to 0.50 percent. Next is silicone, with a range of 0.10 percent to 0.60 percent. The last alloy is manganese, with an allowable range of 0.60 percent to 0.90 percent. Phosphorus may sometimes be found in this product, to a maximum of 0.04 percent.
CHEMICAL ANALYSIS

Dongguan Otai Special Steel Co Ltd is A high-technology steel mill in Dongguan, China. Otai Steel supplies a wide range of carbon, alloy, and stainless steel products, including high speed tool steel, cold /hot works tool steel, plastic mold steel, engineering steel and machine structural steel, etc. Our factory now boasts lathes, grinding equipment, horizontal saws, vertical sewing machines, CNC flame cutting machines, surface, face, plane and end milling machines, plasma cutting machines, and more. If you cooperate with us,quality-assured, no middlemen, we can provide a free tool steel sample. To learn more, contact us at any time: Email: jack@otaisteel.com

420 stainless steel contains a minimum of 12 percent chromium, sufficient to give 420 corrosion resistance properties. It has good ductility in the annealed condition but is capable of being hardened up to 50 RHC.

Its best corrosion resistance is achieved when 420 is hardened and surface ground or polished. In the hardened condition, 420 has good corrosion resistance to the atmosphere, foods, fresh water, mild alkalies and acids, steam, sterilizing solutions, crude oil, gasoline, and other similar corrosive media. I would like to share a news with you about the application of stainless steels .According to the report, some groups in Egypt is protecting its priceless collection of ancient manuscripts using precision-engineered stainless steel cases. It shows the good property of corrosion resistance .Furthermore ,Principal applications include Bushings, Dental and Surgical Instruments, Pump Parts, Valve Parts, and Shafts.

Dongguan Otai Special Steel Co Ltd is A high-technology steel mill in Dongguan, With over 20 years of experience we provide high-quality tool steel, Mould Steels, Special Steels and stainless steels made exactly to your specifications. Our Main Markets containing North America , South America , Eastern Europe , Southeast Asia , Africa , Oceania , Mid East , Eastern Asia , Western Europe , Southern Europe , South Asia and Domestic Market. We are appreciate for your inquiry.

Today,  let’s talk about the M42 high-Speed steel, it has other known names such as  1.3247, HS 2-10-1-8, S500, E M42, REX M42.It is a molybdenum series high-speed steel alloy with an additional 8 or 10 percent cobalt. M42 steel has good wear resistance and hot hardness along with high hardness values. Furthermore, Excellent cutting performance can be achieved from tools made in M42 high speed steel.

It is widely used in metal manufacturing industries because of its superior red hardness as compared to more conventional high-speed steels. This allows for shorter cycle times in production environments due to its higher cutting speeds and from the increase in time between tool changes. M42 costs less when compared to those same tools made of carbide.

An Italian customer bought 15 tons of M42 round steel from our company, used as a high-speed cutting tool, like a drill bit. Mostly, it is mainly used in high-end industries. he was satisfied with the product.

M42 High-Speed Steel Chemical Composition

Dongguan Otai Special Steel experienced on this field for more than 20 years, We are steel experts and have been providing high quality customer service and products. We export our steel to the customer all over the world, and we build good relationship with our clients. If you choose us Dongguan Otai Special Steel, you will receive excellent quality and reasonable price. Small-quantity steel is also supported .we can provide a variety kinds of steel ,so please don’t hesitate to contact with us .

P20 Mold Steel, Do you know about it? It is a versatile, low-alloy tool steel that is characterized by good toughness at moderate strength levels. Nickel and chromium are the alloying elements for hardness and toughness. This alloy is most often used in the carburized condition. Usually, The steel is used for plastic injection mold cavities and tooling and for die casting dies for zinc. P20 Mold Steel is typically sold in the pre-hardened condition at a hardness of approximately 300 HBW, black steel sheet or hot rolled steel is also provided.

There are three kinds of thickness you can choose as you want about the P20 Mold Steel, we show the details as follows,20-120mm, 130-150mm, and  155-180mm. I have a piece of good news to share with you, we have cooperation with famous steel mill in china, so the quality is assured. Also , MOQ is not limited at a suitable price. We have a large of material steel in storage, so it’s convenient for you to place an order.

Welcome to connect with us if you have any question, our company (The Otai special steel company ) have a good reputation in the Chinese steel market, we have already exported our steel to many counties, our clients have a good impression on us.  The less you spend, the more benefit you will get. We are responsible for every order, and we will deliver the goods in two days after you place an order. Looking for your good news.

What does AISI4340 means?

As we know, the kind of steel materials is innumerable. I’d like to share the  AISI4340  with you, AISI4340 is nickel-chromium-molybdenum alloy steel known for its toughness and its ability to attain high strengths in the heat-treated condition. It has very good fatigue resistance, also, it maintaining wear resistance.  Let’s talk about the application about the  4340, it’s mainly applying in Commercial and military aircraft, automotive systems, forged hydraulic and other machine tool applications, forged steel crankshafts.

The demand of the  AISI4340  is huge in South  America and North  America, especially in  South America, we receive many emails about order inquiry every year, we have many clients in  South  America,  they are very interested in  AISI4340, and once order, try again .we  have good relationship with our clients, we’ll visit our clients every year for further cooperation.  also, clients will arrange a  schedule to visit our mill, so we are familiar with each other.

Many clients choose our company (The special steel of Aotai )  because of a reasonable price .if  you buy materials from   Aotai, quality assurance, export standard testing, let you save 20% cost, each piece of Aotai special steel has been strictly tested and used with confidence, welcome inquiry.  We are experts at specific die steel,  more than 98%  of the steel company can’t catch up with us. Moreover, we have a large steel stock, you will save your time if you choose our company The special steel of Otai. If you want to buy AISI4340, please don’t hesitate to contact me.

How to find valuable and trustable 8620 steel suppliers in such a huge China market?

As you may know, in the Chinese steel industry market, it is mixed up by the good and not good company. some customers do not distinguish which one is better and which one is worse. and finally, clients will be easily taken in. Because there are thousands of steel industry company located in a different area in China.  each of the main products is completely different, some 8620 steel suppliers are only focusing on some type of Alloy steel, some are mainly on the plastic mold steel.

In this new social environment, the Chinese steel industry in the process of foreign trade, to the actual situation and the basic status quo in the industry to analyze and judge. in the process of export trade, it can easily meet the challenges and difficulties in the international environment. At the same time according to the domestic market situation of policy changes and restructuring, it is needed to improve the trade environment.

In the face of more and more fierce market competition, Chinese steel enterprises are improving and upgrading the internal skills”. comprehensively deepen reform, constantly improve the management mechanism of enterprises, change the traditional business philosophy. increase technological innovation, optimize the structure of steel products, strengthen international exchanges and cooperation, thereby increasing the competitiveness of enterprises, and promoting the sustainable development of steel enterprises.

In this mixed market, and it is really very important to find a stable and valuable supplier.8620 steel suppliers, or other different kinds of special steel suppliers and on. And do not only focus on the price things, but customers could also know more about the supplier’s history and its culture and its mission.

Otai provides high quality 8 620 steel

Congratulations you are so lucky to find us here. Because Dongguan Otai Special Steel experienced on this field for more than 20years.and we are not only one of 8620 steel suppliers but also the carbon steel, hot/cold work steel, and plastic mold steel supplier. and our mission is to make customers without any worries about working with us. we always consider that doing business just like what we usually do in daily life, we cherish the chance that we meet here very much. If we work it together in a sincere and open heart, we believe that the beautiful things will go around both of us every day.

 P20 plastic mould steel, once you order it from Otai company, you will go on to place the order again. What is the P20? It is a mold material for plastic injection, it belongs to the high-quality medium carbon. It is Pre-hardness(28~34HRc), Cold work plastic mold steel. It’s no need for further heat treatment. so you don’t have any worry about distortion or cracking.it is most widely used to plastic mold material in injection plastic mold.

A story about p20 plastic mould steel

For this P20 steel, I would like to share a funny story about my senior manager Mr. Liang. Following is his statement:

I remember that when I start to work in this plastic mold steel field. there is no professional training on the products at all at that company. we only have a product catalog that was copied from another competitor supplier. it is only with 2-3 pages. And the catalog is very simple, the paper quality is worse. I only could read the number from a catalog, but could not understand anything about other words meaning.

During the company for about two weeks, I always sit in front of the computer.  I searched for some more data for the P20 steel from the internet. On the morning of one day, the boss asked me that can you visit the customer for the business. I was shocked and my head is blank because I did not get any training on the products. I had no idea about the target customers which will use the P20 steel. it may lose my face if I said to the boss I can’t do it. So I said yes, I can. And then I checked some customer contact info and address in Dongguan. visited them immediately without making an appointment.

When I met the customer, I gave him my name card and catalog and had a very short introduction to my company .and after that, I kept silent over there. The customer asked me some simple questions and found I was fresh sales. Even in my mind, I questioned myself, what is the P20 steel? Is it plastic or steel? He said, hey, young man, thanks for your visit. I purchased the plastic mold steel from another supplier. we will not choose the new supplier which is a small company.

After that, my manager Mr. Liang worked very hard. and now he is super professional on all the steel products. through more than 20 years of development and experience for the Otai company. we are proud to be a part of this industry because of our creating technique .we exported different special steel to more than 30 countries all over the world. Most of our customers once placed the order, they will place the repeat order to us .because they trust us about the quality, profession, and service.

Difference between h11 and h13 – What is the difference between h11 and h13? This article will introduce the difference between them.

1. What is h11 and h13 steel?

H11 compare H13
H11 : It is relatively low in carbon content and has good toughness and deep hardens by air quench from heat treatment.
H13 : Due to its high toughness and excellent heat treatment stability, H13 can also be used in a variety of cold working tools

2. Chemical composition

3. Application

H11 is often used for highly stressed structural parts such as aircraft landing gear

H11 is common in Europe

H13Used in die casting mould, die casting sleeve, hot forging mould, extrusion mould and plastic mould cavity

H13 is the main material in the United States

According to the use condition of the mould factory, the 1.2344 more wear-resistant. Generally speaking, the service life of 1.2344 will be longer than 1.2343 in the same product, but the price almost the same, that’s why most customers prefer 1.2344, so we offer both 1.2344 and 1.2343 for your reference.

H13 application –H13 tool steels are suitable for forming extrusion dies.
H13 steel is widely used, mainly used in inserts, cores, and cavities for die casting dies, die casting shot sleeves, hot forging dies, extrusion dies, etc.

Because of its excellent combination of high toughness and resistance to thermal fatigue cracking (also known as heat checking) H13 is used for more hot work tooling applications than any other tool steel.

H13 Tool Steel is a versatile chromium-molybdenum hot work steel that is widely used in hot work and cold work tooling applications. The hot hardness (hot strength) of H13 resists thermal fatigue cracking which occurs as a result of cyclic heating and cooling cycles in hot work tooling applications. Because of its excellent combination of high toughness and resistance to thermal fatigue cracking (also known as heat checking) H13 is used for more hot work tooling applications than any other tool steel.

COMPOSITION

Characteristic

H13 steel is the most widely used and most representative hot work die steel. Its main characteristics are as below:

(1) has high hardenability and high toughness;

(2) Excellent resistance to thermal cracking, which can be water-cooled in the workplace;

(3) It has medium abrasion resistance, and can also be used to improve the surface hardness of carburizing or nitriding process, but slightly reduce the resistance to thermal cracking;

(4) Because of its low carbon content, the secondary hardening ability in tempering is poor;

(5) It has softening resistance at higher temperatures, but the hardness is higher than 540 °C (1000 °F), and the hardness is rapidly decreased (ie, the working temperature is 540 °C);

Because of its high toughness and very good stability in heat treatment, H13 is also used in a variety of cold work tooling applications. In these applications, H13 provides better hardenability (through hardening in large section thicknesses) and better wear resistance than common alloy steels such as 4140.

H13 Application

Inserts, cores, and cavities for die casting dies, die casting shot sleeves, hot forging dies, extrusion dies, and plastic mold cavities and components that require high toughness and excellent polishability.