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4140 steel and 8620 steel

Otai exports various tool steel and alloy to more than 30 countries from Europe and America, Middle East, and Asia. Our steel materials meet DIN / ASTM / EN / JIS etc different international standards. Today we will talk about 4140 steel and 8620 steel’s difference and its application. 

4140 steel, the steel has good workability, machining deformation of small, anti-fatigue performance is quite good.

On the hardenability of steel, 4140 heat treatment has good strength and good comprehensive mechanical properties, good manufacturability, high yield. The highest temperature is 427 degrees Celsius. 4140 strength, high hardenability, and good toughness, quenching deformation of small, high temperature creep rupture strength, and high. It is used for manufacturing forgings with higher strength and larger tempering cross-section than 35CrMo steel, such as big gear for locomotive traction, supercharger drive gear, rear axle, connecting rod and spring clamp with great load, also can be used for drilling pipe joint and fishing tool of oil deep well below 2000m, and can be used for bending machine mold, etc.

8620 is the structural steel with the hardenability guaranteed by American standard, and the standard is as follows: ASTM A29/ A29m-2015 (hot forged and cold processed carbon steel and alloy steel bar).

It has high hardenability, no tempering brittleness, good weldability, little tendency to form cold crack, good maintainability, and cold strain plasticity. Generally used in quenching and tempering or carburizing state, used for manufacturing small and medium-sized automobile, tractor engine and gear in the transmission system, oil drilling and metallurgy open mine cone bit teeth and teeth body, manufacturing steam turbine gear whole rotor internal combustion engine connecting rod valve section forgings. At the same time, the surface of 8620 steel after carburizing heat treatment has relatively high hardness, wear-resistance, and contact fatigue strength, while the core retains good toughness and can withstand high impact load. It can be used as automobile bearing, spindle, gear, mechanical parts, and other impact-resistant, wear-resistant workpieces.

Otai does not act as a material handler. We possess proprietary technology and continuously iterates. We undertake every order to end and solve customer’s problems without any hesitation on responsibility. When customized special steel is hard to get, Otai settles satisfactorily completely.

9310 steel and 8620 steel

Otai exports various tool steel and alloy to more than 30 countries from Europe and America, Middle East, and Asia. Our steel materials meet DIN / ASTM / EN / JIS etc different international standards. Today we will talk about 9310 steel and 8620 steel’s difference and its application.

9310 Alloy Steel (also known as AISI 9310 steel) is low alloy steel composed primarily of nickel and chromium.

The standard is ASTM A322. It shows high hardenability, high core hardness, and high fatigue strength. It also possesses solid ductility, weldability, and machinability properties. Its Components with a large cross-section requiring high toughness and core strength, It Mainly used for such as critical aircraft engine gears, automotive applications, structural components, gears, rods, heat-treatable shafts, high-performance helicopter transmission gears, and other components.

8620 is the structural steel with the hardenability guaranteed by American standard. Its standard is as follows: ASTM A29/ A29m-2015 (hot forged and cold processed carbon steel and alloy steel bar).

It has high hardenability, no tempering brittleness, good weldability, little tendency to form a cold crack, good maintainability, and cold strain plasticity. Generally used in quenching and tempering or carburizing state, used for manufacturing small and medium-sized automobile, tractor engine and gear in the transmission system, oil drilling and metallurgy open mine cone bit teeth and teeth body, manufacturing steam turbine gear whole rotor internal combustion engine connecting rod valve section forgings. At the same time, the surface of 8620 steel after carburizing heat treatment has relatively high hardness, wear-resistance, and contact fatigue strength, while the core retains good toughness and can withstand high impact load. It can be used as automobile bearing, spindle, gear, mechanical parts, and other impact-resistant, wear-resistant workpieces.

Otai does not act as a material handler. We possess proprietary technology and continuously iterates. We undertake every order to end and solve customer’s problems without any hesitation on responsibility. When customized special steel is hard to get, Otai settles satisfactorily completely.

9310 and Mild steel

Otai exports various 9310 and Mild steel to more than 30 countries from Europe and America, Middle East, and Asia. Our steel materials meet DIN / ASTM / EN / JIS etc different international standards. Today we will talk about 9310 and Mild steel’s difference and its application. 

9310 Alloy Steel (also known as AISI 9310 steel) is low alloy steel composed primarily of nickel and chromium.

The standard is ASTM A322. It shows high hardenability, high core hardness, and high fatigue strength. It also possesses solid ductility, weldability, and machinability properties. Its Components with a large cross-section requiring high toughness and core strength, It Mainly used for such as critical aircraft engine gears, automotive applications, structural components, gears, rods, heat-treatable shafts, high-performance helicopter transmission gears, and other components.

Mild steel is also known as mild steel because of its low strength and hardness.

It includes most ordinary carbon structural steel and a part of high-quality carbon structural steel, most of which are not used for engineering structural parts by heat treatment, some by carburizing and other heat treatment for mechanical parts requiring wear resistance.

The annealing structure of low carbon steel is ferrite and a small amount of pearlite. Therefore, its cold forming ability is good, can be used to roll, bend, stamping, and other methods of cold forming. The steel also has good weldability. The carbon content ranges from 0.10% to 0.30%. Low carbon steel is easy to be processed such as forging, welding, and cutting. It is often used to make chains, rivets, bolts, and shafts.

Otai does not act as a material handler. We possess proprietary technology and continuously iterates. We undertake every order to end and solve customer’s problems without any hesitation on responsibility. When customized special steel is hard to get, Otai settles satisfactorily completely.

4140 plate fast delivery  from Otai Special Steel in 7-10 days . Otai Special Steel was the sole supplier of more than 500 tons 4140 plate of inventory in South China . From June , our monthly warehouse number may exceed 500 tons . Which size was sold out , we may replenish inventory accordingly . We will make sure any size any time have more stock list . I promise no other supplier could do this .

Otai Special Steel have specialized in provide 4140 plate fast delivery . We have more than 16 years export experience . Also professional for 4140 / 8620 /4340 / 34CrNiMo6 / M2 / 18CrNiMo7-6 round bar … … . Our steel sold to all over the world . And our repeat customer from every where on the earth .

Why Otai Special steel could provide 4140 plate fast delivery in 7-10 days? And why so many repeat customer purchase 4140 plate from us. Why Dyson Krupp , Mitsubishi want to co-operate with Otai Special Steel?

1. Otai Special steel has adequate supply was first step to ensure 4140 plate fast delivery. All 4140 plate in warehouse comes from BaoSteel . Baosteel was the best steel mills in China. The quantities for 4140 plate in our warehouse arrived 500Tons, and from June, exceed to be more than 500Tons. All the sizes required by our customers are available in our warehouse.
2. Excellent quality was the second step for 4140 plate fast delivery. BaoSteel makes the quality originals the best. And Otai Special Steel has our own quality inspection instrument. Hand-held spectrometer use on Chemical composition analysis per heat and conform to the standard . UT test to check the material inside quality. Hardness test to guarantee the requirement. Physical checking to ensure tolerance . All the special size requested by the customer we have our own cutting machines. Vertical band sawing machine, Horizontal sawmill. CNC Gas Cutting Machine, Plane milling machine. End face milling machine, Large die spotting machine. Make sure the size meeting customer’s tolerance.
3. The best service from Otai Special Steel was the last step to confirm the 4140 plate fast delivery. All the other difficult could be handle by Otai before shipment. The end-use guiding. Technical problems in the use of processing . Delivery problems. Shipping documents problems …… All the problems we could solve for you.
4. Know all of the Otai Special Steel and 4140 plate. Any interesting, please contact us directly.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

EN24 steel and mild steel

Otai exports various tool steel and alloy to more than 30 countries from Europe and America, Middle East, and Asia. Our steel materials meet DIN / ASTM / EN / JIS etc different international standards. Special Steel supplied by Otai is fully trusted by the US oil field giant and one military industry well-known enterprise. Today we will talk about EN24 steel and Mild steel’s difference and application.

EN24 steel is a kind of alloy structural steel – mechanical steel.

The first is to improve the hardenability of steel, to ensure that the steel after heat treatment to obtain a good comprehensive mechanical property, with high strength and enough toughness.

Suitable for cold pressing, thin blanking dies, punch and shear die. It is also suitable for manufacturing precision molds, precision instruments, precision side setting tools, reamer, milling cutter, roller, cold-drawn die, GAUGE, sample die, punch, cold-cut, scissors, tungsten knife, woodworking tools, spiral touch, various punching die and so on.

Mild steel is also known as mild steel because of its low strength and hardness.

It includes most ordinary carbon structural steel and a part of high-quality carbon structural steel, most of which are not used for engineering structural parts by heat treatment, some by carburizing and other heat treatment for mechanical parts requiring wear resistance.

The annealing structure of low carbon steel is ferrite and a small amount of pearlite. Therefore, its cold forming ability is good, can be used to roll, bend, stamping, and other methods of cold forming. The steel also has good weldability. The carbon content ranges from 0.10% to 0.30%. Low carbon steel is easy to be processed such as forging, welding, and cutting. It is often used to make chains, rivets, bolts, and shafts.

Otai undertakes every order to end and solve customer’s problems without any hesitation on responsibility. When customized special steel is hard to get, Otai settles satisfactorily completely.

34CrNiMo6 Round Bar with competitive price in June from Otai Special Steel . Otai Special Steel was sole supplier in South China for provide CrNiMo steel . Otai Special Steel have export steel experience all over the world for more than 16 years . We have more than 100 repeat customer from Spain , Argentina , Chile , Ecuador , Brazil , Italy , Qatar , Turkey , U.A.E , Egypt ,  Kuwait , Bulgaria , Japan , Thailand , Singapore , Malaysia , Vietnam … … . And all our steel have provided to the steel giants like Dyson Krupp , Mitsubishi … …

Otai Special Steel have the complete 34CrNiMo6 Round bar stock list . Any size any condition could be found here . Although we have many stock list and many size to be choose . The price was very competitive .

Why so many customers were Otai special Steel’s repeat customer . We have our own advantage as follow :

1. Sufficient supplies. Other suppliers may have carbon steel, alloy steel, but no one has CrNiMo steel. Otai Special steel has 34CrNiMo6 round bar, 18CrNiMo7-6 round bar, 8620 round bar, tubes, 4340 round bar, 30CrNiMo8 … … All normal sizes have a stock list, special size could place the order .
2. Best quality. All the materials from the mill factory to our warehouse have qualified. Otai Special steel has professional measurement tools. Handheld spectrometer to check Chemical composition analysis. UT test to check the material inside quality. Hardness test to guarantee the requirement. Physical checking to ensure tolerance .
3. Competitive price. As we know all this kind of steel market situation, so we could give the best price for you.
4. Good service. We could provide the steel as the customer requested. And we also could give customer suggestions to save costs, choose the correct materials. And give professional technical guidance.                                                                                           
5. Otai Special Steel no only provides steel 34CrNiMo6 round bar. But also provide the best service all according to this steel. Any inquiries, please contact us directly.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

Today, there is a 42crmo4 steel plates inquiry from UAE. During the communication with the customer, I talked about some characteristics of 42crmo4 steel. I was often asked if the DIN 42crmo4 is a material. I will explain it to you today.

42CrMO4 steel plates belong to European standard alloy structural steel, with high strength, high hardenability, good toughness, small deformation during quenching, and high creep and durable strength at high temperature. It is characterized by good machinability, easy polishing, easy to bite flowers. 42CrMo4 can be used for manufacturing locomotive traction gear, supercharger drive gear, rear axle, maximum load connecting rod and spring clip, 42CrMo4 can also be used for oil deep well pipe joints and fishing tool below 2000m.

Otai is the largest wholesaler of 42CrMO4 Steel plate in South China. We have sufficient stock of 800 tons and materials of different specifications for customers to transfer goods at any time. Our stock status of 42CrMO4 is hot rolled and Forging without machining. For 42CrMO4 Steel plates, the general customer does not need machining, we can guarantee the delivery within 7 days, just because we have enough different specifications of the superior conditions of inventory, Otai has now become a large wholesaler in many countries in China for free inventory, with the delivery, is our purpose to serve customers.4. Otai guarantees high quality. For 42CrMO4, customers who have cooperated with us can return orders up to 80%.

2 hours after-sale response, 2 days earlier than expected, hard for competitors to do this.

EN19 Steel | 4140 | 1.7225 | SCM440 | 42CrMo4

4340 Round bar Annealled  is a alloy structural steel . 4340 is used for engineering structural . Normally 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 . 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 is othermal quenching .

OTAI SPECIAL STEEL is ASTM 4340 Round bar Annealled stockholders and suppliers from china . We have more than 16 years experience in 4340 round bar Annealled , plate , steel flat bar , square supply .

4340 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 .

4340 steel properties is very similar with GB 40CrNiMo steel . JIS SNCM439 and DIN 1.6511 36CrNiMo4 Alloy structural steel . At most work environment , 4340 is equivalent with 40CrNiMo, 1.6511 36CrNiMo4, SNCM439 steel .

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

8620 Alloy Steel Export to south American . Otai Special Steel have export experience for alloy steel more than 16 years . We have specialized in provide high speed steel , tool steel and …. . Any steel with plate and round bar , flat bar …… . Any size for original from Mill factory and special size for customized . Otai Special Steel could satisfied you .

AISI 8620 Alloy steel export is widely used for a variety of applications in the used in the automotive and engineering industries for toolholders and other such components. Typical applications such as valve bodies, pumps and fittings, Shaft, the high load of wheel, bolts, double-headed bolts, gears, etc

8620 Alloy steel export to all over the world . For this thing , Otai Special Steel have done for more than 16 years . And when last time a customer from Argentina have contacted with us . He only need 5Tons 8620 Alloy steel round bar . And for the delivery fees and so less quantities , it is difficult to import from us . So we suggest he to consult with our regular customer from this period .

Our regualr customer from south american was a big steel stockholder . He sells many kinds of steel . Alloy steel 4140 , tool steel 8620/4340 /D2, high speed steel M2 /T1 . The new inquiry customer found our agent . They have reached a agreement . Finally they have ordered one full container to us , and the new customer have got his quantities , and our agent make more stocklist .

In Otai Special Steel , we often meeting this situation , and solve the problems for our regular customer also for new potential customer . We not only sell steel . We could provide the steel end use best suggestion . Any problem with steel could found us , and we will give our best support to solve your problems .

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com