Category Archives: Blog

4140 heat treatment

A： What we want to share today is the information about 4140 steel’s heat treatment.

B：4140 steel responds readily to heat treatment and is comparatively easy to machine in heat-treated conditions.

A：4140 steel resists creep in temperatures up to 845° C and maintains its properties even after long exposure at these relatively high working temperatures.

B： After heat treatment, 4140 steel’s hardness is 54 to 59 HRC.

A： Heat Treatment 4140 alloy steel is heated at 845°C followed by quenching in oil.

B： Before hardening, it can be normalized by heating it at 913°C for a long period of time, followed by air cooling.

A： The following is about the prehardened 4140 steel’s flame harden.

B：4140 steel is a 1% chromium-molybdenum medium hardenability general purpose high tensile steel.

A： It has generally supplied hardened and tempered in the tensile range of 850 – 1000 Mpa.

B： After Pre hardened and tempered, 4140 steel can be further surface hardened by flame or induction hardening and by nitriding.

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

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

A： If you want to know more, you can visit our website：www.otaisteel.com

B： 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 hr plate

4140 hr 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.

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.

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.

News about the steel

The price of bulk commodities (4140 hr plate )only climbs to the middle and takes a break, and will continue to rise. Because the factors that led to the rise of bulk commodity prices have not changed, the released water is still there, the dollar is still weak, and the supply gap is still there. The recovery of the global economy is still expected, and inflation expectations, in turn, are still pushing up, and commodity prices will continue to rise.

Otai provides the grinding, milling, polishing, turning, drilling, and other machining services as your required tolerances and size. (4140 hr 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.

en19 plate

en19 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.

en19 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, en19 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, en19 steel is not stainless steel. Please pay attention to its rust prevention when using it.

But en19 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.

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.

News about the steel

The price of bulk commodities (en19 plate )only climbs to the middle and takes a break, and will continue to rise. Because the factors that led to the rise of bulk commodity prices have not changed, the released water is still there, the dollar is still weak, and the supply gap is still there. The recovery of the global economy is still expected, and inflation expectations, in turn, are still pushing up, and commodity prices will continue to rise.

Otai provides the grinding, milling, polishing, turning, drilling, and other machining services as your required tolerances and size. (en19 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 1 plate

4140 1 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.

4140 1 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.

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.

News about the steel

The price of bulk commodities (4140 1 plate )only climbs to the middle and takes a break, and will continue to rise. Because the factors that led to the rise of bulk commodity prices have not changed, the released water is still there, the dollar is still weak, and the supply gap is still there. The recovery of the global economy is still expected, and inflation expectations, in turn, are still pushing up, and commodity prices will continue to rise.

Otai provides the grinding, milling, polishing, turning, drilling, and other machining services as your required tolerances and size. (4140 1 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.

2 4140 steel plate

2 4140 steel 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.

2 4140 steel 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.

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.

News about the steel

The price of bulk commodities (2 4140 steel plate )only climbs to the middle and takes a break, and will continue to rise. Because the factors that led to the rise of bulk commodity prices have not changed, the released water is still there, the dollar is still weak, and the supply gap is still there. The recovery of the global economy is still expected, and inflation expectations, in turn, are still pushing up, and commodity prices will continue to rise.

Otai provides the grinding, milling, polishing, turning, drilling, and other machining services as your required tolerances and size. (2 4140 steel 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 1

4140 plate 1: 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.

4140 plate 1: 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.

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.

News about the steel

The price of bulk commodities (4140 plate 1 )only climbs to the middle and takes a break, and will continue to rise. Because the factors that led to the rise of bulk commodity prices have not changed, the released water is still there, the dollar is still weak, and the supply gap is still there. The recovery of the global economy is still expected, and inflation expectations, in turn, are still pushing up, and commodity prices will continue to rise.

Otai provides the grinding, milling, polishing, turning, drilling, and other machining services as your required tolerances and size. (4140 plate 1: 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.

6 4140 steel plate

6 4140 steel 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.

6 4140 steel 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.

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.

News about the steel

The price of bulk commodities (6 4140 steel plate )only climbs to the middle and takes a break, and will continue to rise. Because the factors that led to the rise of bulk commodity prices have not changed, the released water is still there, the dollar is still weak, and the supply gap is still there. The recovery of the global economy is still expected, and inflation expectations, in turn, are still pushing up, and commodity prices will continue to rise.

Otai provides the grinding, milling, polishing, turning, drilling, and other machining services as your required tolerances and size. (6 4140 steel 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.

en19 flat

en19 flat: 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.

en19 flat: 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, en19 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, en19 steel is not stainless steel. Please pay attention to its rust prevention when using it.

But en19 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.

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.

News about the steel

The price of bulk commodities (en19 flat )only climbs to the middle and takes a break, and will continue to rise. Because the factors that led to the rise of bulk commodity prices have not changed, the released water is still there, the dollar is still weak, and the supply gap is still there. The recovery of the global economy is still expected, and inflation expectations, in turn, are still pushing up, and commodity prices will continue to rise.

Otai provides the grinding, milling, polishing, turning, drilling, and other machining services as your required tolerances and size. (en19 flat: 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.

1.7225 plate size

1.7225 plate size: 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.

1.7225 plate size: 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, 1.7225 steel is not stainless steel. Please pay attention to its rust prevention when using it.

But 1.7225 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.

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.

News about the steel

The price of bulk commodities (1.7225 plate size )only climbs to the middle and takes a break, and will continue to rise. Because the factors that led to the rise of bulk commodity prices have not changed, the released water is still there, the dollar is still weak, and the supply gap is still there. The recovery of the global economy is still expected, and inflation expectations, in turn, are still pushing up, and commodity prices will continue to rise.

Otai provides the grinding, milling, polishing, turning, drilling, and other machining services as your required tolerances and size. (1.7225 plate size: 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.

1.7225 plate

1.7225 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.

1.7225 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.

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.

News about the steel

The price of bulk commodities (1.7225 plate )only climbs to the middle and takes a break, and will continue to rise. Because the factors that led to the rise of bulk commodity prices have not changed, the released water is still there, the dollar is still weak, and the supply gap is still there. The recovery of the global economy is still expected, and inflation expectations, in turn, are still pushing up, and commodity prices will continue to rise.

Otai provides the grinding, milling, polishing, turning, drilling, and other machining services as your required tolerances and size. (1.7225 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.