Best Price Hot Rolled 42CrMo Seamless Alloy Steel Tube

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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.

We are convinced that with joint endeavours, the small business between us will bring us mutual benefits. We could assure you products quality and competitive selling price for PriceList for Best Price Seamless 42CrMo Hot Rolled Alloy Steel Tube, Our enterprise is functioning from the operation principle of “integrity-based, cooperation created, people oriented, win-win cooperation”. We hope we can have a pleasant romance with businessman from all around the entire world.
PriceList for China Seamless Alloy Tube and Alloy Steel, We hope to have long-term cooperation relationships with our clients. If you are interested in any of our items, be sure to do not hesitate to send enquiry to us/company name. We ensure that you can be totally satisfied with our best solutions!