Reasonable price 20cr,40cr,20crmo,30-35CrMo,42CrMo,12cr1movg,15crmog, 30crmngia,15mog, 20mog, 12crm Hot/Cold Rolled ASTM A53 A106 Grade B Seamless Boiler Pipe for Alloy Steel

Our pursuit and corporation intention is to “Always satisfy our client requirements”. We continue to develop and style remarkable high-quality items for each our outdated and new shoppers and accomplish a win-win prospect for our customers likewise as us for Reasonable price 20cr,40cr,20crmo,30-35CrMo,42CrMo,12cr1movg,15crmog, 30crmngia,15mog, 20mog, 12crm Hot/Cold Rolled ASTM A53 A106 Grade B Seamless Boiler Pipe for Alloy Steel, By means of our hard do the job, we have always been around the forefront of clean technology products innovation. We are a inexperienced partner you can rely on. Get in touch with us today for additional data!
Our pursuit and corporation intention is to “Always satisfy our client requirements”. We continue to develop and style remarkable high-quality items for each our outdated and new shoppers and accomplish a win-win prospect for our customers likewise as us for 42CrMo Alloy Seamless Steel Pipe, Since the establishment of our company, now we have realized the importance of providing good quality items and the best before-sales and after-sales services. Most problems between global suppliers and clients are due to poor communication. Culturally, suppliers can be reluctant to question things they do not understand. We break down these barriers to ensure you get what you want to the level you expect, when you want it.

It has no obvious temper brittleness, small deformation during quenching, high fatigue limit and multiple impact resistance after quenching and tempering treatment. 42CrMo alloy seamless pipe has good impact toughness at low temperature and high creep strength and endurance strength at high temperature. Surface quenching after quenching and tempering is usually used as the heat treatment scheme for 42CrMo alloy seamless pipes.

Alloy special steel:41Cr4,25CrMo4,30CrMo4,34CrMo4,42CrMo4

OD: 20-660mm WT: 2.3-100mm L: 5.8M, 6M, 11.8M, 12M or any other specified length.

Application: Machining, General engineering, crane arm, Bushes, Cylinders Various, Conveyor Rolls, Hollow Shafts, Hollow Parts and components, Nuts, Rings, etc

Application of 42CrMo alloy seamless pipe: the special steel used for bridges is “42CrMo”, the special steel for automobile girders is “42CrMo”, and the special steel for pressure vessels is “42CrMo”. This kind of steel improves the mechanical properties of steel by adjusting the carbon (c) content. Therefore, according to the carbon content, this kind of steel can be divided into: low carbon steel — the carbon content is generally less than 0.25%, such as 10 and 20 steel; Medium carbon steel — the carbon content is generally between 0.25 and 0.60%, such as 35 and 45 steel; High carbon steel — the carbon content is generally greater than 0.60%. This type of steel is generally not used to make steel pipes.

Typical Application
Suitable for making large and medium-sized plastic molds requiring certain strength and toughness.

Tolerances of Lengths:
When Length equals 6000mm, Tolerances 0/+10
When 6 000 < L =12 000, Tolerances 0/+15
When > 12 000,Tolerances 0/+ by agreement
Process specification and physical properties of 42CrMo steel pipe
42CrMo steel pipe, carbon content: 0.38 ～ 0.45%, silicon: 0.17 ～ 0.37%, manganese: 0.50 ～ 0.80%.

42CrMo steel pipe belongs to ultra-high strength steel, with high strength and toughness, good hardenability, no obvious tempering brittleness, high fatigue limit and multiple impact resistance after quenching and tempering treatment, and good low-temperature impact toughness.

The steel is suitable for manufacturing large and medium-sized plastic molds requiring certain strength and toughness. Its corresponding international standard organization brand: 42CrMo4 corresponds to Japanese brand: scm440 corresponds to German brand: 42CrMo4 approximately corresponds to American brand: 4140 characteristics and scope of application: high strength, hardenability, good toughness, small deformation during quenching, high creep strength and endurance strength at high temperature. It is used to manufacture forgings with higher strength and larger quenching and tempering cross-section than 35CrMo steel, such as large gear for locomotive traction, transmission gear of supercharger, rear axle, connecting rod and spring clamp with great load, drill pipe joint and fishing tool for oil deep well below 2000m, and mold for bending machine.

Sulfur s: allowable residual content ≤ 0.035%

Phosphorus P: allowable residual content ≤ 0.035%

Chromium (CR): 0.90 ～ 1.20%

Nickel Ni: allowable residual content ≤ 0.030%

Copper Cu: allowable residual content ≤ 0.030%

Molybdenum (MO): 0.15 ～ 0.25%

Allowable stress of 42CrMo

42CrMo allowable stress 186 ～ 310 / MPa, yield point 930 σ S / MPa, 42CrMo has high strength, hardenability, good toughness, small deformation during quenching, and high creep strength and endurance strength at high temperature. 42CrMo steel pipe is used to manufacture forgings with higher strength and larger quenched and tempered section than 35CrMo steel.

1) Critical point temperature (approximate): AC1 = 730 ° C, AC3 = 800 ° C, Ms = 310 ° C.

2) Linear expansion coefficient: temperature 20 ~ 100 ° C / 20 ~ 200 ° C / 20 ~ 300 ° C / 20 ~ 400 ° C / 20 ~ 500 ° C / 20 ~ 600 ° C, linear expansion coefficient: 11.1 × 10K/12.1 × 10K/12.9 × 10K/13.5 × 10K/13.9 × 10K14.1 × 10K。

3) Elastic modulus: temperature 20 ° C / 300 ° C / 400 ° C / 500 ° C / 600 ° C, elastic modulus 210000mpa / 185000mpa / 175000mpa / 165000mpa / 15500mpa

Hot working specification
The heating temperature is 1150 ~ 1200 ° C, the starting temperature is 1130 ~ 1180 ° C, and the ending temperature is > 850 ° C, φ> 50mm, slow cooling.

Normalizing specification
The normalizing temperature is 850 ~ 900 ° C, and the furnace is cooled by air.

High temperature tempering specification
The tempering temperature is 680 ~ 700 ° C, and the furnace is cooled by air.

Quenching and tempering specifications
Preheating temperature 680 ~ 700 ° C, quenching temperature 840 ~ 880 ° C, oil cooling, tempering temperature 580 ° C, water cooling or oil cooling, hardness ≤ 217hbw.

Specification for subcritical strengthening and toughening
Quenching temperature 900 ° C, tempering temperature 560 ° C, hardness (37 ± 1) HRC

Specification for induction quenching and tempering
Quenching temperature 900 ° C, tempering temperature 150 ~ 180 ° C, hardness 54 ~ 60HRC.

Hot working specification
The heating temperature is 1150 ~ 1200 ° C, the starting temperature is 1130 ~ 1180 ° C, and the ending temperature is > 850 ° C, φ> 50mm, slow cooling.

Normalizing specification
The normalizing temperature is 850 ~ 900 ° C, and the furnace is cooled by air.

High temperature tempering specification
The tempering temperature is 680 ~ 700 ° C, and the furnace is cooled by air.

Quenching and tempering specifications
Preheating temperature 680 ~ 700 ° C, quenching temperature 840 ~ 880 ° C, oil cooling, tempering temperature 580 ° C, water cooling or oil cooling, hardness ≤ 217hbw.

Specification for subcritical strengthening and toughening
Quenching temperature 900 ° C, tempering temperature 560 ° C, hardness (37 ± 1) HRC

Specification for induction quenching and tempering
Quenching temperature 900 ° C, tempering temperature 150 ~ 180 ° C, hardness 54 ~ 60HRC.

Our pursuit and corporation intention is to “Always satisfy our client requirements”. We continue to develop and style remarkable high-quality items for each our outdated and new shoppers and accomplish a win-win prospect for our customers likewise as us for Reasonable price 20cr,40cr,20crmo,30-35CrMo,42CrMo,12cr1movg,15crmog, 30crmngia,15mog, 20mog, 12crm Hot/Cold Rolled ASTM A53 A106 Grade B Seamless Boiler Pipe for Alloy Steel, By means of our hard do the job, we have always been around the forefront of clean technology products innovation. We are a inexperienced partner you can rely on. Get in touch with us today for additional data!
Reasonable price China Steel and Steel Roll, Since the establishment of our company, now we have realized the importance of providing good quality items and the best before-sales and after-sales services. Most problems between global suppliers and clients are due to poor communication. Culturally, suppliers can be reluctant to question things they do not understand. We break down these barriers to ensure you get what you want to the level you expect, when you want it.