Category Archives: Blog

4140 hr ar plate -It can be oil hardened to relatively high hardenability | OTAI

What is 4140 steel

4140 alloy steel is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components. For example, axles, shafts, bolts, gears, and other applications.

Similar to alloy grade AISI 4130 chrome moly alloy steel but with slightly higher carbon content.

The higher carbon content of 4140 steel gives greater strength and heat treatment capabilities in comparison to AISI / ASTM 4130 alloy steel.

However, it does have inferior weldability characteristics.

Steel news

At present, nine counties and cities in Tangshan have lifted the management of regional blockade control.
The clustered epidemics in many places in China have dragged down the production and operation of the manufacturing and construction industries. In the short term, the demand for steel has been unstable, and the rise in steel prices is insufficient.
Once the social “dynamic clearing” is realized in various places, the demand for steel will be released retaliatory, the demand growth may be higher than the supply, the inventory will enter a stage of decline, and there may still be room for steel prices to rise.

Why Choose OTAI

1)All year round, Otai can guarantee our 4140 flat stocks are more than 1500 tons. Different thicknesses and lengths can be customized.

2)After placing an order, shipment can be arranged immediately.

3)Otai is a leading China supplier of 4140 steel, working with Uddeholm, Thyssenkrupp, with ISO9001 certified.

Customer’s story

We would like to share a real case of our customer with you. Jay from Brazil send us an inquiry about the 4140 sheets, which required a lot of specifications and a small quantity. James asked many suppliers who were unwilling to cooperate and finally found us. We are the source manufacturer so that we can meet the needs of customers to customize the specifications of goods. Then James placed the order successfully. After receiving the goods, he said that he would seek our cooperation for a long time. (4140 hr ar plate)

4140 plate thickness –1~10mm, Cold Rolled, Fast Delivery | OTAI

What is 4140 steel

4140 alloy steel is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components. For example, axles, shafts, bolts, gears, and other applications.

Similar to alloy grade AISI 4130 chrome moly alloy steel but with slightly higher carbon content.

The higher carbon content of 4140 steel gives greater strength and heat treatment capabilities in comparison to AISI / ASTM 4130 alloy steel.

However, it does have inferior weldability characteristics.

Steel news

At present, nine counties and cities in Tangshan have lifted the management of regional blockade control.
The clustered epidemics in many places in China have dragged down the production and operation of the manufacturing and construction industries. In the short term, the demand for steel has been unstable, and the rise in steel prices is insufficient.
Once the social “dynamic clearing” is realized in various places, the demand for steel will be released retaliatory, the demand growth may be higher than the supply, the inventory will enter a stage of decline, and there may still be room for steel prices to rise.

Why Choose OTAI

1)All year round, Otai can guarantee our 4140 flat stocks are more than 1500 tons. Different thicknesses and lengths can be customized.

2)After placing an order, shipment can be arranged immediately.

3)Otai is a leading China supplier of 4140 steel, working with Uddeholm, Thyssenkrupp, with ISO9001 certified.

Customer’s story

We would like to share a real case of our customer with you. Jay from Brazil send us an inquiry about the 4140 sheets, which required a lot of specifications and a small quantity. James asked many suppliers who were unwilling to cooperate and finally found us. We are the source manufacturer so that we can meet the needs of customers to customize the specifications of goods. Then James placed the order successfully. After receiving the goods, he said that he would seek our cooperation for a long time. (4140 plate thickness)

1/2 4140 steel plate – 4~300mm thickness in Stock  | OTAI

What is 4140 steel

4140 steel is a cold drawn annealed steel of relatively high hardenability with its chromium content providing good hardness penetration, and the molybdenum imparts uniformity of hardness and high strength.

4140 alloy steel well to heat-treatment and is relatively easy to machine in the annealed condition. 4140 steel has good strength and wear resistance, excellent toughness, coupled with good ductility, and the ability to resist stress at elevated temperatures. (4140 plate properties)

One of our customers Stacy from Indonesia sent us an inquiry for 4140 plate steel. As time is tight, she needs to receive these 18 tons of 4140 steel within 45 days. That’s no problem for us because we keep a daily inventory of 1500 tons.

After the customer placed her order, we prepared his 4140 steel ready this week. We also assisted the customer to find the fastest delivery, and the goods were delivered to the customer in 45 days. (1/2 4140 steel plate)

Steel News

After the implementation of the closure and control, the operation of the Shanghai port terminal has not been affected much at present, and the main thing that will be affected is the truck operation.
Although the blockade does not close the port, the efficiency of port operations and terminal operations will be affected. It is not easy for port workers and truck drivers to enter and leave the port due to the epidemic. This leads to delays in timeliness, and it is expected that the freight will also be increased.

Why Choose OTAI

1)All year round, Otai can guarantee our 4140 steel is more than 1500 tons. Different thicknesses and lengths can be customized.

2)Otai is capable of supplying “small lot, various grades” which our competitors cannot do. 

3)10 consecutive years no quality event complaints, over 80% repeat order rate.

4140 plate 1.5 thick – 4140 Annealed Cold Finish stock | OTAI

What is 4140 steel

4140 alloy steel is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components. For example, axles, shafts, bolts, gears, and other applications.

Similar to alloy grade AISI 4130 chrome moly alloy steel but with slightly higher carbon content.

The higher carbon content of 4140 steel gives greater strength and heat treatment capabilities in comparison to AISI / ASTM 4130 alloy steel.

However, it does have inferior weldability characteristics.

Steel news

At present, nine counties and cities in Tangshan have lifted the management of regional blockade control.
The clustered epidemics in many places in China have dragged down the production and operation of the manufacturing and construction industries. In the short term, the demand for steel has been unstable, and the rise in steel prices is insufficient.
Once the social “dynamic clearing” is realized in various places, the demand for steel will be released retaliatory, the demand growth may be higher than the supply, the inventory will enter a stage of decline, and there may still be room for steel prices to rise.

Why Choose OTAI

1)All year round, Otai can guarantee our 4140 flat stocks are more than 1500 tons. Different thicknesses and lengths can be customized.

2)After placing an order, shipment can be arranged immediately.

3)Otai is a leading China supplier of 4140 steel, working with Uddeholm, Thyssenkrupp, with ISO9001 certified.

Customer’s story

We would like to share a real case of our customer with you. Jay from Brazil send us an inquiry about the 4140 sheets, which required a lot of specifications and a small quantity. James asked many suppliers who were unwilling to cooperate and finally found us. We are the source manufacturer so that we can meet the needs of customers to customize the specifications of goods. Then James placed the order successfully. After receiving the goods, he said that he would seek our cooperation for a long time. (4140 plate 1.5 thick)

4140 dcf plate –It means the plate has been ground top and bottom | OTAI

What is 4140 steel

4140 alloy steel is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components. For example, axles, shafts, bolts, gears, and other applications.

Similar to alloy grade AISI 4130 chrome moly alloy steel but with slightly higher carbon content.

The higher carbon content of 4140 steel gives greater strength and heat treatment capabilities in comparison to AISI / ASTM 4130 alloy steel.

However, it does have inferior weldability characteristics.

Steel news

At present, nine counties and cities in Tangshan have lifted the management of regional blockade control.
The clustered epidemics in many places in China have dragged down the production and operation of the manufacturing and construction industries. In the short term, the demand for steel has been unstable, and the rise in steel prices is insufficient.
Once the social “dynamic clearing” is realized in various places, the demand for steel will be released retaliatory, the demand growth may be higher than the supply, the inventory will enter a stage of decline, and there may still be room for steel prices to rise.

Why Choose OTAI

1)All year round, Otai can guarantee our 4140 flat stocks are more than 1500 tons. Different thicknesses and lengths can be customized.

2)After placing an order, shipment can be arranged immediately.

3)Otai is a leading China supplier of 4140 steel, working with Uddeholm, Thyssenkrupp, with ISO9001 certified.

Customer’s story

We would like to share a real case of our customer with you. Jay from Brazil send us an inquiry about the 4140 sheets, which required a lot of specifications and a small quantity. James asked many suppliers who were unwilling to cooperate and finally found us. We are the source manufacturer so that we can meet the needs of customers to customize the specifications of goods. Then James placed the order successfully. After receiving the goods, he said that he would seek our cooperation for a long time. (4140 dcf plate)

4140 pht plate -Oil quench below 200 F and temper immediately  | OTAI

What is 4140 steel

4140 steel is a cold drawn annealed steel of relatively high hardenability with its chromium content providing good hardness penetration, and the molybdenum imparts uniformity of hardness and high strength.

4140 alloy steel well to heat-treatment and is relatively easy to machine in the annealed condition. 4140 steel has good strength and wear resistance, excellent toughness, coupled with good ductility, and the ability to resist stress at elevated temperatures. (4140 plate properties)

One of our customers Stacy from Indonesia sent us an inquiry for 4140 plate steel. As time is tight, she needs to receive these 18 tons of 4140 steel within 45 days. That’s no problem for us because we keep a daily inventory of 1500 tons.

After the customer placed her order, we prepared his 4140 steel ready this week. We also assisted the customer to find the fastest delivery, and the goods were delivered to the customer in 45 days. (4140 pht plate)

Steel News

After the implementation of the closure and control, the operation of the Shanghai port terminal has not been affected much at present, and the main thing that will be affected is the truck operation.
Although the blockade does not close the port, the efficiency of port operations and terminal operations will be affected. It is not easy for port workers and truck drivers to enter and leave the port due to the epidemic. This leads to delays in timeliness, and it is expected that the freight will also be increased.

Why Choose OTAI

1)All year round, Otai can guarantee our 4140 steel is more than 1500 tons. Different thicknesses and lengths can be customized.

2)Otai is capable of supplying “small lot, various grades” which our competitors cannot do. 

3)10 consecutive years no quality event complaints, over 80% repeat order rate.

4140 plate spec – 4140 prehard heat treated material | OTAI

What is 4140 steel

4140 alloy steel is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components. For example, axles, shafts, bolts, gears, and other applications.

Similar to alloy grade AISI 4130 chrome moly alloy steel but with slightly higher carbon content.

The higher carbon content of 4140 steel gives greater strength and heat treatment capabilities in comparison to AISI / ASTM 4130 alloy steel.

However, it does have inferior weldability characteristics.

Steel news

At present, nine counties and cities in Tangshan have lifted the management of regional blockade control.
The clustered epidemics in many places in China have dragged down the production and operation of the manufacturing and construction industries. In the short term, the demand for steel has been unstable, and the rise in steel prices is insufficient.
Once the social “dynamic clearing” is realized in various places, the demand for steel will be released retaliatory, the demand growth may be higher than the supply, the inventory will enter a stage of decline, and there may still be room for steel prices to rise.

Why Choose OTAI

1)All year round, Otai can guarantee our 4140 flat stocks are more than 1500 tons. Different thicknesses and lengths can be customized.

2)After placing an order, shipment can be arranged immediately.

3)Otai is a leading China supplier of 4140 steel, working with Uddeholm, Thyssenkrupp, with ISO9001 certified.

Customer’s story

We would like to share a real case of our customer with you. Jay from Brazil send us an inquiry about the 4140 sheets, which required a lot of specifications and a small quantity. James asked many suppliers who were unwilling to cooperate and finally found us. We are the source manufacturer so that we can meet the needs of customers to customize the specifications of goods. Then James placed the order successfully. After receiving the goods, he said that he would seek our cooperation for a long time. (4140 plate spec)

4140 flat bar sizes -Most of flat bar and plate are in hot rolled condition | OTAI

What is 4140 steel

4140 alloy steel is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components. For example, axles, shafts, bolts, gears, and other applications.

Similar to alloy grade AISI 4130 chrome moly alloy steel but with slightly higher carbon content.

The higher carbon content of 4140 steel gives greater strength and heat treatment capabilities in comparison to AISI / ASTM 4130 alloy steel.

However, it does have inferior weldability characteristics.

Steel news

At present, nine counties and cities in Tangshan have lifted the management of regional blockade control.
The clustered epidemics in many places in China have dragged down the production and operation of the manufacturing and construction industries. In the short term, the demand for steel has been unstable, and the rise in steel prices is insufficient.
Once the social “dynamic clearing” is realized in various places, the demand for steel will be released retaliatory, the demand growth may be higher than the supply, the inventory will enter a stage of decline, and there may still be room for steel prices to rise.

Why Choose OTAI

1)All year round, Otai can guarantee our 4140 flat stocks are more than 1500 tons. Different thicknesses and lengths can be customized.

2)After placing an order, shipment can be arranged immediately.

3)Otai is a leading China supplier of 4140 steel, working with Uddeholm, Thyssenkrupp, with ISO9001 certified.

Customer’s story

We would like to share a real case of our customer with you. Jay from Brazil send us an inquiry about the 4140 sheets, which required a lot of specifications and a small quantity. James asked many suppliers who were unwilling to cooperate and finally found us. We are the source manufacturer so that we can meet the needs of customers to customize the specifications of goods. Then James placed the order successfully. After receiving the goods, he said that he would seek our cooperation for a long time. (4140 flat bar sizes)

4140 flat bar steel -It‘’s considered to be a “through hardening steel  | OTAI

What is 4140 steel

4140 steel is a cold drawn annealed steel of relatively high hardenability with its chromium content providing good hardness penetration, and the molybdenum imparts uniformity of hardness and high strength.

4140 alloy steel well to heat-treatment and is relatively easy to machine in the annealed condition. 4140 steel has good strength and wear resistance, excellent toughness, coupled with good ductility, and the ability to resist stress at elevated temperatures. (4140 plate properties)

One of our customers Stacy from Indonesia sent us an inquiry for 4140 plate steel. As time is tight, she needs to receive these 18 tons of 4140 steel within 45 days. That’s no problem for us because we keep a daily inventory of 1500 tons.

After the customer placed her order, we prepared his 4140 steel ready this week. We also assisted the customer to find the fastest delivery, and the goods were delivered to the customer in 45 days. (4140 flat bar steel)

Steel News

After the implementation of the closure and control, the operation of the Shanghai port terminal has not been affected much at present, and the main thing that will be affected is the truck operation.
Although the blockade does not close the port, the efficiency of port operations and terminal operations will be affected. It is not easy for port workers and truck drivers to enter and leave the port due to the epidemic. This leads to delays in timeliness, and it is expected that the freight will also be increased.

Why Choose OTAI

1)All year round, Otai can guarantee our 4140 steel is more than 1500 tons. Different thicknesses and lengths can be customized.

2)Otai is capable of supplying “small lot, various grades” which our competitors cannot do. 

3)10 consecutive years no quality event complaints, over 80% repeat order rate.

4140 flat bar suppliers -4140 Steel In Metal Flat Stock for sale | OTAI

What is 4140 steel

4140 alloy steel is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components. For example, axles, shafts, bolts, gears, and other applications.

Similar to alloy grade AISI 4130 chrome moly alloy steel but with slightly higher carbon content.

The higher carbon content of 4140 steel gives greater strength and heat treatment capabilities in comparison to AISI / ASTM 4130 alloy steel.

However, it does have inferior weldability characteristics.

Steel news

At present, nine counties and cities in Tangshan have lifted the management of regional blockade control.
The clustered epidemics in many places in China have dragged down the production and operation of the manufacturing and construction industries. In the short term, the demand for steel has been unstable, and the rise in steel prices is insufficient.
Once the social “dynamic clearing” is realized in various places, the demand for steel will be released retaliatory, the demand growth may be higher than the supply, the inventory will enter a stage of decline, and there may still be room for steel prices to rise.

Why Choose OTAI

1)All year round, Otai can guarantee our 4140 flat stocks are more than 1500 tons. Different thicknesses and lengths can be customized.

2)After placing an order, shipment can be arranged immediately.

3)Otai is a leading China supplier of 4140 steel, working with Uddeholm, Thyssenkrupp, with ISO9001 certified.

Customer’s story

We would like to share a real case of our customer with you. Jay from Brazil send us an inquiry about the 4140 sheets, which required a lot of specifications and a small quantity. James asked many suppliers who were unwilling to cooperate and finally found us. We are the source manufacturer so that we can meet the needs of customers to customize the specifications of goods. Then James placed the order successfully. After receiving the goods, he said that he would seek our cooperation for a long time. (4140 flat bar suppliers)