Gear Steel And Bearing Steel

42CrMo4 Alloy Structural Steel Bar

42CrMo4 Alloy Structural Steel Bar
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Product Details

42CrMo4 is a kind of alloy steel with high hardenability, toughness and machinability. It has small temper deformation, high fatigue limit and resistance to repeated impact after quenching and tempering, available in the form of plates and bars.

 

Standards: ASTM A29/A29M, ISO  683,EN  10263-4, EN  10250-3 , DIN EN 10083/3

Type: Round bar, Plate

Size: 3-360 mm

Finish: Peeled, Hot Rolled, Turned and Polished, Centreless Ground.

 

The Equivalent Standards:

JIS

AISI

GB

BS

ГOCT

ISO

JIS   SCM4

4140/4142

GB 3077   42CrMo

708M40/708A42/709M40

38XM

683/1   3

 

The Chemical Composition

C

Si

Mn

Ni

Cr

Mo

P

S

0.38-0.45

0.17-0.37

0.50-0.80

≤0.3

0.9-1.2

0.15-0.25

≤0.035

≤0.035

 

The Mechanical Properties

Tensile   Strength
    (MPa)

Yield   Strength 0.2% (MPa)

Elongation   -% in 50 mm (min.)

Hardness,   HB

≥1080(110)

≥930(95)

12

≤217

 

Heat treatment:

Heating temperature 1150 ~1200°C, starting temperature 1130 ~1180°C, termination temperature > 850°C, with > 50mm, slow cooling.

l  Normalizing: temperature at 850~900°C, air cooled.

l  High temperature tempering: temperature at 680~700°C, air cooling.

l  Quenching and tempering: preheating temperature 680 ~700°C, quenching temperature 840~880°C, oil-cooled, tempering temperature 580°C, water-cooled or oil-cooled, hardness ≤217HBW.

 

Applications:

42CrMo4 is wildly used in large locomotive traction gears, supercharger drive gear, pressure vessels, gear, rear axle, greatly affected by load and spring clip link It can also be use to 2000m deep oil drill pipe joints and fishing tools, and can be use bending machine mold, etc.

 

 

World iron&steel is a professional supplier of alloy steel rods and bars. We manufacture and distribute high quality 42CrMo4 Gear steel round bar in accordance with EN10083 standards, specified delivery conditions and final customer specifications for industrial and commercial applications. Special sizes of steel bars and delivery issues can be further negotiated and we provide a wide range of solutions for purchasing departments to select alternative grades, contact us today!


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