Category Archives: Blog

4140 plate steel for sale

4140 plate steel for sale: China suppliers, wholesale, distributors, and stockholder–Dongguan Otai Special Steel Co Ltd. We Otai is a manufacturer and has a large quantity of stock in our warehouse. We supply in Round bar, gauge plate steel, pipe, tube, rod, square, hexagonal, blanks, plate, sheet, precision ground flat bar. Including precision ground bar stock, hollow bar, we provide black surface and black surface alloy steel material.

1)  4140 steel belongs to the alloy structural steel. After Quenching & Tempering, its hardness is 28-34 HRC.

2) 4140 steel used for bending machine molds.

3) Besides, it can be used to under 2000m deep well of oil drill pipe joint and the fishing tool.

4) Also, it can be used for engineering structural parts, like high tensile shafts, gears, pinions, and spindles.

4140 hr plate: Its heat treatment has good strength and good comprehensive mechanical properties.

The common stainless steel’s chromium content is higher than 12.5%. So it has anti-rust performance. From the analysis of the composition, 4140 steel also has chromium. But its chromium content is only 0.8%-1.1%, which is far lower than the standard for rust prevention. Therefore, 4140 steel is not stainless steel. Please pay attention to its rust prevention when using it.

But 4140 steel can be used to make gears. Because lubricating oil is often used when gears are running. The lubricating oil can protect the gear from rust while protecting the normal operation of the gear.

News about the steel

In July this year, iron ore production in China came to 79.929 million mt. The prices indicated a further sharp decrease in August amid the central government’s target to decrease crude steel output and also amid significant decreases in ferrous metal futures prices. (4140 plate steel for sale )

Otai provides the grinding, milling, polishing, turning, drilling, and other machining services as your required tolerances and size. (4140 plate steel for sale: We keep a daily inventory of 1500 tons)

Otai does not act as a material handler. We possess proprietary technology and continuously iterate. We undertake every order to end and solve customer’s problems without any hesitation on responsibility. We are welcome to your kind inquiry.

4140 ground plate

4140 ground plate: China suppliers, wholesale, distributors, and stockholder–Dongguan Otai Special Steel Co Ltd. We Otai is a manufacturer and has a large quantity of stock in our warehouse. We supply in Round bar, gauge plate steel, pipe, tube, rod, square, hexagonal, blanks, plate, sheet, precision ground flat bar. Including precision ground bar stock, hollow bar, we provide black surface and black surface alloy steel material.

1)  4140 steel belongs to the alloy structural steel. After Quenching & Tempering, its hardness is 28-34 HRC.

2) 4140 steel used for bending machine molds.

3) Besides, it can be used to under 2000m deep well of oil drill pipe joint and the fishing tool.

4) Also, it can be used for engineering structural parts, like high tensile shafts, gears, pinions, and spindles.

4140 hr plate: Its heat treatment has good strength and good comprehensive mechanical properties.

The common stainless steel’s chromium content is higher than 12.5%. So it has anti-rust performance. From the analysis of the composition, 4140 steel also has chromium. But its chromium content is only 0.8%-1.1%, which is far lower than the standard for rust prevention. Therefore, 4140 steel is not stainless steel. Please pay attention to its rust prevention when using it.

But 4140 steel can be used to make gears. Because lubricating oil is often used when gears are running. The lubricating oil can protect the gear from rust while protecting the normal operation of the gear.

News about the steel

In July this year, iron ore production in China came to 79.929 million mt. The prices indicated a further sharp decrease in August amid the central government’s target to decrease crude steel output and also amid significant decreases in ferrous metal futures prices. (4140 ground plate )

Otai provides the grinding, milling, polishing, turning, drilling, and other machining services as your required tolerances and size. (4140 ground plate: We keep a daily inventory of 1500 tons)

Otai does not act as a material handler. We possess proprietary technology and continuously iterate. We undertake every order to end and solve customer’s problems without any hesitation on responsibility. We are welcome to your kind inquiry.

4140 plate as rolled hardness

4140 plate as rolled hardness: China suppliers, wholesale, distributors, and stockholder–Dongguan Otai Special Steel Co Ltd. We Otai is a manufacturer and has a large quantity of stock in our warehouse. We supply in Round bar, gauge plate steel, pipe, tube, rod, square, hexagonal, blanks, plate, sheet, precision ground flat bar. Including precision ground bar stock, hollow bar, we provide black surface and black surface alloy steel material.

1)  4140 steel belongs to the alloy structural steel. After Quenching & Tempering, its hardness is 28-34 HRC.

2) 4140 steel used for bending machine molds.

3) Besides, it can be used to under 2000m deep well of oil drill pipe joint and the fishing tool.

4) Also, it can be used for engineering structural parts, like high tensile shafts, gears, pinions, and spindles.

4140 hr plate: Its heat treatment has good strength and good comprehensive mechanical properties.

The common stainless steel’s chromium content is higher than 12.5%. So it has anti-rust performance. From the analysis of the composition, 4140 steel also has chromium. But its chromium content is only 0.8%-1.1%, which is far lower than the standard for rust prevention. Therefore, 4140 steel is not stainless steel. Please pay attention to its rust prevention when using it.

But 4140 steel can be used to make gears. Because lubricating oil is often used when gears are running. The lubricating oil can protect the gear from rust while protecting the normal operation of the gear.

News about the steel

In July this year, iron ore production in China came to 79.929 million mt. The prices indicated a further sharp decrease in August amid the central government’s target to decrease crude steel output and also amid significant decreases in ferrous metal futures prices. (4140 plate as rolled hardness )

Otai provides the grinding, milling, polishing, turning, drilling, and other machining services as your required tolerances and size. (4140 plate as rolled hardness: We keep a daily inventory of 1500 tons)

Otai does not act as a material handler. We possess proprietary technology and continuously iterate. We undertake every order to end and solve customer’s problems without any hesitation on responsibility. We are welcome to your kind inquiry.

4140 plate hardness

4140 plate hardness: China suppliers, wholesale, distributors, and stockholder–Dongguan Otai Special Steel Co Ltd. We Otai is a manufacturer and has a large quantity of stock in our warehouse. We supply in Round bar, gauge plate steel, pipe, tube, rod, square, hexagonal, blanks, plate, sheet, precision ground flat bar. Including precision ground bar stock, hollow bar, we provide black surface and black surface alloy steel material.

1)  4140 steel belongs to the alloy structural steel. After Quenching & Tempering, its hardness is 28-34 HRC.

2) 4140 steel used for bending machine molds.

3) Besides, it can be used to under 2000m deep well of oil drill pipe joint and the fishing tool.

4) Also, it can be used for engineering structural parts, like high tensile shafts, gears, pinions, and spindles.

4140 hr plate: Its heat treatment has good strength and good comprehensive mechanical properties.

The common stainless steel’s chromium content is higher than 12.5%. So it has anti-rust performance. From the analysis of the composition, 4140 steel also has chromium. But its chromium content is only 0.8%-1.1%, which is far lower than the standard for rust prevention. Therefore, 4140 steel is not stainless steel. Please pay attention to its rust prevention when using it.

But 4140 steel can be used to make gears. Because lubricating oil is often used when gears are running. The lubricating oil can protect the gear from rust while protecting the normal operation of the gear.

News about the steel

In July this year, iron ore production in China came to 79.929 million mt. The prices indicated a further sharp decrease in August amid the central government’s target to decrease crude steel output and also amid significant decreases in ferrous metal futures prices. (4140 plate hardness )

Otai provides the grinding, milling, polishing, turning, drilling, and other machining services as your required tolerances and size. (4140 plate hardness: We keep a daily inventory of 1500 tons)

Otai does not act as a material handler. We possess proprietary technology and continuously iterate. We undertake every order to end and solve customer’s problems without any hesitation on responsibility. We are welcome to your kind inquiry.

4140 steel plate hardness

4140 steel plate hardness: China suppliers, wholesale, distributors, and stockholder–Dongguan Otai Special Steel Co Ltd. We Otai is a manufacturer and has a large quantity of stock in our warehouse. We supply in Round bar, gauge plate steel, pipe, tube, rod, square, hexagonal, blanks, plate, sheet, precision ground flat bar. Including precision ground bar stock, hollow bar, we provide black surface and black surface alloy steel material.

1)  4140 steel belongs to the alloy structural steel. After Quenching & Tempering, its hardness is 28-34 HRC.

2) 4140 steel used for bending machine molds.

3) Besides, it can be used to under 2000m deep well of oil drill pipe joint and the fishing tool.

4) Also, it can be used for engineering structural parts, like high tensile shafts, gears, pinions, and spindles.

4140 hr plate: Its heat treatment has good strength and good comprehensive mechanical properties.

The common stainless steel’s chromium content is higher than 12.5%. So it has anti-rust performance. From the analysis of the composition, 4140 steel also has chromium. But its chromium content is only 0.8%-1.1%, which is far lower than the standard for rust prevention. Therefore, 4140 steel is not stainless steel. Please pay attention to its rust prevention when using it.

But 4140 steel can be used to make gears. Because lubricating oil is often used when gears are running. The lubricating oil can protect the gear from rust while protecting the normal operation of the gear.

News about the steel

In July this year, iron ore production in China came to 79.929 million mt. The prices indicated a further sharp decrease in August amid the central government’s target to decrease crude steel output and also amid significant decreases in ferrous metal futures prices. (4140 steel plate hardness )

Otai provides the grinding, milling, polishing, turning, drilling, and other machining services as your required tolerances and size. (4140 steel plate hardness: We keep a daily inventory of 1500 tons)

Otai does not act as a material handler. We possess proprietary technology and continuously iterate. We undertake every order to end and solve customer’s problems without any hesitation on responsibility. We are welcome to your kind inquiry.

4130 vs 5140

4130 vs 5140 : what is the difference between 4130 steel and 5140 steel?

A： Today we will discuss 4130 steel and 5140 steel.

B： Distinguish from the type of steel, 4130 steel and 5140 steel are all alloy steels. 

A： From the analysis of their content, their carbon content is 0.38%-0.43% 

B： And the chromium content of 4130 steel is 0.80%-1.10%, while the chromium content of 5140 steel is 0.7%-0.9%.

A：4130 steel can be used for structural tubing, bicycle frames, gas bottles for transportation of pressurized gases, firearm parts, clutch and flywheel components, and roll cages.

B：5140 steel can be used for low and moderately stressed parts for vehicles, engines, and machines where a hard, wear-resistant surface is needed. Its hardness as surface hardened about 54 HRC. 5140 sheets of steel can also be for the marine engineering industry, chemical processing plants, boiler & pressure vessels, nuclear power plants, etc. 

A： So what is the difference between them? 

B：4130 steel has an excellent strength to weight ratio but is not easily welded, requiring thermal treatment both before and after welding to avoid cold cracking.

A：I hope that customers should consider what kind of performance you need for the steel that you purchase and then buy on demand.

B： By the way, for 4140 steel, we can supply the round bar, steel flat bar, and plate.

A： Rectangular pieces can be cut from flat bar or plate to your specific sizes.

B： The above is about the difference between 4130 steel and 5140 steel. If you want to know more, you can visit our website：www.otaisteel.com

A： You can also send an email or call us.

Otai does not act as a material handler. We possess proprietary technology and continuously iterate. We undertake every order to end and solve customer’s problems without any hesitation on responsibility. We are welcome to your kind inquiry.

4130 vs 4340

4130 vs 4340 : what is the difference between 4130 steel and 4340 steel?

A： Today we will discuss 4130 steel and 4340 steel.

B： Distinguish from the type of steel, 4130 steel and 4340 steel are all alloy steels. 

A： From the analysis of the composition, they all contain Chromium and molybdenum.

B： Yes. But 4340 steel has Nickel content, while 4130 steel does not.

A：4130 steel has an excellent strength to weight ratio and is considerably stronger and harder than standard 1020 steel, but is not easily welded, requiring thermal treatment both before and after welding to avoid cold cracking.

B：4340 steel is “ultra-high” strength steel classified a medium-carbon, low-alloy steel. 4340 has high strength, ductility, toughness, creep resistance, and fatigue resistance relative to most other steels. High degrees of hardenability are achievable in the alloy, with HRC hardnesses ranging from 24 to 53 depending on the heat treatment.

A： So what is the difference between them? 

B：4130 steel has a higher carbon level, giving it improved weldability, at the expense of through-thickness strength.

A：I hope that customers should consider what kind of performance you need for the steel that you purchase and then buy on demand.

B： By the way, for 4140 steel, we can supply the round bar, steel flat bar, and plate.

A： Rectangular pieces can be cut from flat bar or plate to your specific sizes.

B： The above is about the difference between 4130 steel and 4340 steel. If you want to know more, you can visit our website：www.otaisteel.com

A： You can also send an email or call us.

Otai does not act as a material handler. We possess proprietary technology and continuously iterate. We undertake every order to end and solve customer’s problems without any hesitation on responsibility. We are welcome to your kind inquiry.

4140 vs 5140

4140 vs 5140 : what is the difference between 4140 steel and 5140 steel?

A： Today we are still discussing 4140 steel. As we know that 4140 steel belongs to the alloy structural steel.

B：5140 is one structural alloy steel grade in ASTM A29 standard for general application.

A： From the analysis of their content, their carbon content is all 0.38%-0.43%.

B： And the chromium content of 4140 steel is 0.80%-1.10%, while the chromium content of 5140 steel is 0.7%-0.9%.

A： From the analysis of the hardness, 4140 steel is usually supplied ready heat treated to hardness in 18-22 HRC.

B：5140’s hardness as surface hardened is about 54 HRC.

A： In terms of use, 4140 steel can be used for engineering structural parts, like high tensile shafts and gears.

B：5140 steel is often used for low and moderately stressed parts for vehicles, engines, and machines where a hard, wear-resisting surface is needed.

A： So what’s the difference between them?

B：5140 steel can be used for the marine engineering industry, chemical processing plants, boiler & pressure vessels, and nuclear power plants, etc.

A：I hope that customers should consider what kind of performance you need for the steel that you purchase and then buy on demand.

B： By the way, for 4140 steel, we can supply the round bar, steel flat bar, and plate.

A： Rectangular pieces can be cut from flat bar or plate to your specific sizes.

B： The above is about the difference between 5140 steel and 4140 steel. If you want to know more, you can visit our website：www.otaisteel.com

A： You can also send an email or call us.

Otai does not act as a material handler. We possess proprietary technology and continuously iterate. We undertake every order to end and solve customer’s problems without any hesitation on responsibility. We are welcome to your kind inquiry.

4140 vs D2

4140 vs D2 : what is the difference between 4140 steel and 8620 steel?

A： Today we are still discussing 4140 steel. As we know that 4140 steel belongs to the alloy structural steel.

B： Another common alloy steel is D2. It is 86% the same as 4140 steel.

A： But D2 steel notably contains a higher percentage of carbon and chromium.

B： The carbon content of 4140 steel is 0.38%-0.43%, while the carbon content of D2 steel is 1.40%-1.60%.

A： And the chromium content of 4140 steel is 0.80%-1.10%, while the chromium content of D2 steel is 11.0%-13.0%.

B： From the analysis of the hardness, 4140 steel is usually supplied ready heat treated to hardness in 18-22 HRC while D2 steel is 54-61 HRC HRC.

A： In terms of use, 4140 steel can be used for engineering structural parts, like high tensile shafts and gears.

B： D2 tool steel is often used to make blanking dies, cold forming dies, stamping dies, slitters, punches, trim dies, and thread rolling dies for applications when exceptional toughness is not necessary.

A： So what’s the difference between them?

B： D2 steel can have the highest ductility among steel tools.

A：I hope that customers should consider what kind of performance you need for the steel that you purchase and then buy on demand.

B： By the way, for 4140 steel, we can supply the round bar, steel flat bar, and plate.

A： Rectangular pieces can be cut from flat bar or plate to your specific sizes.

B： The above is about the difference between D2 steel and 4140 steel. If you want to know more, you can visit our website：www.otaisteel.com

A： You can also send an email or call us.

Otai does not act as a material handler. We possess proprietary technology and continuously iterate. We undertake every order to end and solve customer’s problems without any hesitation on responsibility. We are welcome to your kind inquiry.

4140 vs 9310

4140 vs 9310 : what is the difference between 4140 steel and 8620 steel?

A： Today we are still discussing 4140 steel. As we know that 4140 steel belongs to the alloy structural steel.

B： I found a steel that is very similar to 4140 steel—9310 alloy steel.

A： From the analysis of the composition, they all contain Chromium and molybdenum. 

B： Yes. But the carbon content of 4140 steel is 0.38%-0.43%, while the carbon content of 9310 steel is 0.07%-0.13%.

A： From the analysis of the hardness, 4140 steel is usually supplied ready heat treated to hardness in 28-32 HRC.

B：9310 steel is usually supplied ready heat treated to hardness in 60-62 HRC. 

A： In terms of use, 4140 steel can be used for engineering structural parts, like high tensile shafts and gears.

B：9310 steel is mainly used for automotive applications, structural components, and high-performance helicopter transmission gears.

A： So what is the difference between them?

B：9310 steel can be used in some applications without case-hardening, as it exhibits strength with excellent toughness and ductility.

A：I hope that customers should consider what kind of performance you need for the steel that you purchase and then buy on demand.

B： By the way, for 4140 steel, we can supply the round bar, steel flat bar, and plate.

A： Rectangular pieces can be cut from flat bar or plate to your specific sizes.

B： The above is about the difference between 9310 steel and 4140 steel. If you want to know more, you can visit our website：www.otaisteel.com

A： You can also send an email or call us.

Otai does not act as a material handler. We possess proprietary technology and continuously iterate. We undertake every order to end and solve customer’s problems without any hesitation on responsibility. We are welcome to your kind inquiry.