DIN 1.7035 / 41Cr4 Steel is one of the most widely used alloy steel. After QT heat treatment,41Cr4 steel has good comprehensive mechanical properties,low temperature impact toughness and hardenability. DIN 1.7035 steel can get higher fatigue strength after oil cooling. The machinability of 41Cr4 steel is good for normalizing and QT condition. But the weldability of 1.7035 alloy steel is not so good that it’s easy to produce cracks. This material requires preheating before welding.

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;

Equivalent Grades
AISI/ASTM: 5140
BS: 530M40
JIS: SCr440

Form of 1.7035
Round / Square / Flat Bars, Shafts, Rollers, Blocks

Hardness of 41Cr4 Steel
Annealed (+A): max 207HB
Treated to improve shearability (+S): max 255HB

Mechanical Properties of 1.7035 / 41Cr4 Steel
Tensile strength: 980MPa
Yield point: 785MPa
Percentage reduction of area after fracture: 45%
Elongation after fracture: 9%
Impact test (+20°C): Transverse – 22J; Longitud – 30-35J

Quenched and Tempered (+QT) of W-Nr 1.7035 Steel
1. Heat din 1.7035 steel carefully to 850°C;
2. Soak at this temperature then quench in the oil;
3. Temper as soon as 41Cr4 steel reach room temperature (20°C);
4. Heat uniformly to the suitable temperature of 520°C;
5. Withdraw the material from the furnace and cool in the air.

Applications of DIN 41Cr4 Steel
After quenched and tempered,1.7035 steel can be used in the manufacture of medium speed,the load of parts,such as machine tools gear,shaft,worm,etc. Atfer QT and high-frequency surface hardening,41Cr4 steel is always used in the manufacture of high surface hardness,abrasion resistance parts. After quenching and middle temperature tempering,this material is usually used in the manufacture of overloading,medium speed impact of parts.

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