DIN 1.6582 / 34CrNiMo6 Steel is an important alloy engineering steel grade as per DIN Germany standard. It has high strength,high toughness and good hardenability. DIN 1.6582 steel has the stability of resistance to overheating,but the white sensitivity of 34CrNiMo6 is high. It also has the temper brittleness,so the weldability is poor. This steel needs the high temperature preheating before welding,in order to eliminate the stress after welding processing.

Chemical Composition
C: 0.30-0.38; Si: max0.40; Mn: 0.50-0.80; P: max0.025; S: max0.035;
Cr: 1.30-1.70; Ni: 1.30-1.70; Mo: 0.15-0.30;

Equivalent Grades
AISI/ASTM: 4340
BS: 817M40 / EN24
JIS: SNCM447

Form of 1.6582 Steel
Round / Square / Flat Bars, Shafts, Rollers, Blocks

Size of 34CrNiMo6 Steel
– 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
Black, Rough Machined, Turned,

Hardness of 1.6582 Steel
Annealed (+A): max 269HB

Mechanical Properties of 1.6582 / 34CrNiMo6 (+QT)
Tensile strength: 980MPa
Yield point: 835MPa
Percentage reduction of area after fracture: 55%
Elongation after fracture: 12%
Impact test: 45J(+20°C)

Quenched and Tempered (+QT) of 34CrNiMo6 Steel
1. Heat din 1.6582 steel slowly to the temperature of 850°C;
2. Soak at this hardening temperature quench in oil;
3. Temper as soon as 34CrNiMo6 steel reach room temperature.
4. Heat uniformly to the suitable temperature;
5. Withdraw from the furnace and cool in the air.
6. The usual tempering temperature is 600°C which depending on the actual requirements.

Applications of din 1.6582 / 34CrNiMo6 Steel
34CrNiMo6 steel is used to make tools which demands good plasticity and high strength. It is usually selected to make the big size and important parts,such as heavy machinery axle,turbine shaft larger than 250 mm in diameter,blade,high load of transmission parts,fasteners,crank shafts,gears,etc. In addition,din 1.6582 steel grade can be used to make special performance requirements of the important parts