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1.7225 / 42CrMo4 alloy steel bar

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Round bar

Size: Dia.80-1,000mm

Length: 3,000-10,000mm

Payment Terms:T/T ,L/C

Forged steel round bar SCM440

Process: EAF + LF + VD + Forged + Heat Treatment (optional)

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1.7225 / 42CrMo4 alloy steel bar

DIN 1.7225 / 42CrMo4 Steel is a common Chromium-Molybdenum alloy steel that usually used after quenched and tempered. DIN 1.7225 has better performance than 1.7220 steel due to the carbon and chromium content is higher. 42CrMo4 steel has higher strength and hardenability. This material also has high fatigue strength and good low-temperature impact toughness. The temper brittleness is not obvious.

Chemical Composition

C: 0.38-0.45; Si: max0.40; Mn: 0.60-0.90; P: max0.025; S: max0.035;

Cr: 0.90-1.20; Mo: 0.15-0.30;

Equivalent Grades

AISI/ASTM: 4140

BS: 708M40 / EN19

JIS: SCM440

Form of 1.7225

Round / Square / Flat Bars, Shafts, Rollers, Blocks

Size of 42CrMo4

– As Forged

Round bar

Size: Dia.80-1,000mm

Length: 3,000-10,000mm

Square bar

Size: 150×150-600×600mm

Length: 3,000-8,000mm

(Forged Flat Bars, Shafts, Rollers and Blocks can be Customized)

– As Rolled

Round Bar

Size: Dia.10-300mm

Length: 3,000-10,000mm(can be Customized)

Surface Condition of 1.7225 Steel

Black, Rough Machined, Turned

Hardness of 42CrMo4 Steel

Annealed (+A): max 241HB

Treated to improve shearability (+S): max 255HB

Mechanical Properties of 1.7225 / 42CrMo4

Tensile strength: 1080MPa

Yield point: 930MPa

Percentage reduction of area after fracture: 45%

Elongation after fracture: 12%

Impact test (+20°C): Transverse – 22J; Longitud – 33J

Quenched and Tempered (+QT) of W-Nr 1.7225 Steel

1. Heat din 1.7225 steel slowly to 880°C;

2. Soak at this temperature then quench in oil;

3. Temper as soon as 42CrMo4 steel reach room temperature (20°C);

4. Heat uniformly to the suitable temperature of 560°C;

5. Withdraw the material from the furnace and cool in the air.

Annealing of 1.7225 / 42CrMo4

1. Heat the steel component carefully to 690°C;

2. Cool in the air down to 20°C.

Applications of DIN 42CrMo4 Steel

DIN 1.7225 steel is generally used in the manufacture of tools which has high strength requirements. This steel is good for large size and important parts,such as axle,gear,connecting rod,gear transmission,turbocharger gear,engine cylinder,spring,oil drill pipe joints and fishing tool. 42CrMo4 steel is sometimes used instead of the high nickel quenched and tempered steels.

Enquiry for DIN 1.7225 / 42CrMo4 Alloy Steel Round / Square / Flat Bars, Shafts, Rollers, Blocks.