Skip to Content

Category Archives: Blog

4140 steel Machining : Can 4140 steel be machined?

Precision steel round bar 4140

4140 steel Machining

AWhat we want to share today is the information about 4140 steel Machining.

B4140 steel cold roll is a popular general-purpose alloy, ideal for parts that require high tensile strength and toughness.

AIt has considerable atmospheric corrosion and wear resistance, and will not become brittle. 4140 has a machining cost factor of 2.9 when compared to steel 12L14.

BWith the advancement in cutting tool materials and machine tools, today, machining of hardened steel having hardness up to 45 HRC is considered under soft machining.

AAnd machining of hardened steels having hardness in the range of 45–65 HRC is considered under hard machining.

BBesides, 4140 can certainly be cut with HSS. The secret to success with higher carbon steels is to avoid problems with work hardening.

ATo make real cuts, not skim passes, with feeds that get under the hardened surface of the previous cut, both in-depth of cut and in longitudinal feed rate.

BPlease remember that 4140 pre-hard is not difficult to machine, similar to A-2. The surface finish is not that great in 4140 pre-hard unless it is ground.

BBy the way, for 4140 steel, we can supply the round bar, steel flat bar, and plate.

ARectangular pieces can be cut from flat bar or plate to your specific sizes.

B 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.

0 1 Continue Reading →

4140 steel welding : Can 4140 steel be welded?

4140 steel welding

4140 steel welding

AWhat we want to share today is the information about 4140 steel welding.

B4140 steel is alloyed with chromium and molybdenum, hence the term Chromoly steel.

AThe addition of these alloying elements and its relatively high carbon content (around 0.40%), provides this low-alloy steel with an excellent strength-to-weight ratio and makes it a lot stronger and harder.

BThe disadvantage is the need to be more careful when welding 4140 steel, or another medium to high carbon steel for that matter, as compared to low carbon steel.

A4140 steel is typically supplied in either the hardened and tempered condition or in the annealed condition.

BFor welding, it is recommended that you use the latter. Welding on 4140 steel is not recommended due to the high susceptibility for cracking, even when using preheat.

AIf you must weld 4140 steel, it is absolutely necessary that you stress relieve the part at a temperature 15° C below the original tempering temperature.

BTypically, if you have to weld on 4140 steel you are making a repair. 4140 steel should never be used for standard fabrication if possible.

A4140 steel will weld very similar to your low carbon steels. The difference is that its high carbon content can screw things up. To avoid cracking you need to preheat 4140 steel prior to welding.

BBy the way, for 4140 steel, we can supply the round bar, steel flat bar, and plate.

ARectangular pieces can be cut from flat bar or plate to your specific sizes.

B 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.

0 0 Continue Reading →

4140 heat treatment : Can 4140 steel be heat treated?

4140 heat treatment

4140 heat treatment

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

B4140 steel responds readily to heat treatment and is comparatively easy to machine in heat-treated conditions.

A4140 steel resists creep in temperatures up to 845° C and maintains its properties even after long exposure at these relatively high working temperatures.

BAfter heat treatment, 4140 steel’s hardness is 54 to 59 HRC.

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

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

AThe following is about the prehardened 4140 steel’s flame harden.

B4140 steel is a 1% chromium-molybdenum medium hardenability general purpose high tensile steel.

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

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

ABy the way, for 4140 steel, we can supply the round bar, steel flat bar, and plate.

BRectangular 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.

0 0 Continue Reading →

4140 hr plate:4140 plate – Heat Treated or Hot Rolled

4140 hr plate

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.

0 0 Continue Reading →

en19 plate:it is a high quality Q+T Alloy Structural steel

4140 vs D2

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.

0 0 Continue Reading →

4140 1 plate:4140 Prehard Alloy Steel Flat Bar & Plate

42crmo4 Steel Flat Bar

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.

0 0 Continue Reading →

2 4140 steel plate:Alloy Steel Flat Bar 4140 Cold Finished

2 4140 steel plate

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.

0 0 Continue Reading →

4140 plate 1:Buy Alloy Steel Sheet/Plate 4140 Annealed Online

4140 plate 1

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.

0 0 Continue Reading →

6 4140 steel plate:4140 Steel In Metal Sheets & Flat Stock for sale

4140 steel flat bar supplier

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.

0 0 Continue Reading →

en19 flat: EN19 is a high quality, high tensile alloy steel

4140 steel flat supplier

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.

0 0 Continue Reading →