Grades · Alloy & Engineering Steel · 34CrNiMo6

34CrNiMo6

Data verified

34CrNiMo6 is the EN Ni-Cr-Mo Q&T steel (1.6582) for wind-energy shafts, large gears and heavy machinery. Its balanced 1.5% Cr/Ni package gives deep hardenability with good toughness at moderate alloy cost.

Hardness32–42 HRC typical

DIN1.6582 (34CrNiMo6)

AISI4337 (near)

CategoryAlloy & Engineering Steel

Chemical composition

Element	Content (%)
C	0.30–0.38
Si	≤0.40
Mn	0.50–0.80
P	≤0.025
S	≤0.035
Cr	1.30–1.70
Ni	1.30–1.70
Mo	0.15–0.30

Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.

Properties

Hardness (Q&T)	32–42 HRC typical
Tensile strength	1000–1300 MPa (Q&T, EN 10083 section bands)
Density	7.85 g/cm³

Heat treatment

Quench 840–870 °C oil; temper 540–660 °C.

Equivalent grades

Standard	Designation
din	1.6582 (34CrNiMo6)
aisi	4337 (near)

Compare side by side: 34CrNiMo6 vs 30CrNiMo8 · 34CrNiMo6 vs 4340

Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.

Applications & Processing

Applications: Wind turbine shafts and bolts, large gears, crankshafts, heavy machinery parts.

Processing: As 30CrNiMo8 with slightly easier practice; a common prehardened supply grade for big sections.

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Source: EN 10083-3 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.