Category Archives: Blog

4140 vs 1045

4140 vs 1045 : what is the difference between 4140 steel and 1045 steel?

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

B：1045 steel and 4140 steel have distinct chemical and mechanical characteristics which make them valuable for different applications.

A： The carbon content of both 1045 steel and 4140 steel determines the last two digits of their grade number.

B： The carbon content of 1040 steel is 0.40%, while 1045 steel has a carbon content of 0.45%.

A： The first digit “1” identifies that they are both carbon sheets of steel, and the second digit “0” identifies that there were no modifications to the alloy.

B： Note the higher concentration of Manganese in 4140 steel than 1045 steel.

A：4140 steel is chromium, molybdenum, manganese steel with good toughness, impact resistance, and fatigue strength.

B：1045 steel has slightly increased tensile strength and yield strength numbers than 4140 steel as a result of slightly higher carbon content.

A： Also, as a result of higher carbon content, 1045 steel is not as easy to weld as 4140 steel.

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

B： The above is about the difference between 1045 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 4130

4140 vs 4130 : what is the difference between 4140 steel and 4130 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—4130 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 4130 steel is 0.28%-0.33%.

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

B：4130 alloy steel’s hardness is 17HRC.

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

B：4130 steel finds many applications as forgings in the aerospace and oil and gas industries – as forged valve bodies and pumps. 

A： So what is the difference between them?

B：4130 steel is similar to 4140 steel which has a higher carbon level, giving 4130 steel improved weld ability, at the expense of through-thickness strength.

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

B： The above is about the difference between P20 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 4340

4140 vs 4340 : what is the difference between 4140 steel and 4340 steel?

A： Let me share with you something interesting. My customer—— Mike asked me what is the difference between P20 steel and 4140 steel.

B： Distinguish from the type of steel, 4140 steels, 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 4140 steel does not.

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

B： Hardened and tempered 4340 alloy steel can be nitrided, giving a surface hardness of up to 60 HRC. 

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

B：4340 steel can be also used for engineering structural parts, like high tensile shafts and gears. 

A： So what is the difference between them?

B：4340 steel is used in most industry sectors for applications requiring higher tensile/yield strength than 4140 steel can provide.

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

B： The above is about the difference between P20 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 steel Machining

A： What we want to share today is the information about 4140 steel Machining.

B：4140 steel cold roll is a popular general-purpose alloy, ideal for parts that require high tensile strength and toughness.

A： It 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.

B： With 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.

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

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

A： To 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.

B： Please 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.

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： 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 steel welding

A： What we want to share today is the information about 4140 steel welding.

B：4140 steel is alloyed with chromium and molybdenum, hence the term Chromoly steel.

A： The 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.

B： The 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.

A：4140 steel is typically supplied in either the hardened and tempered condition or in the annealed condition.

B： For 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.

A： If 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.

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

A：4140 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.

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： 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 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.