Grades · Alloy & Engineering Steel · 34CrMo4

34CrMo4

Data verified

34CrMo4 is the EN Q&T Cr-Mo steel (1.7220) one step below 42CrMo4, the European counterpart of the 4135/SCM435 family. It is widely used for gas cylinders, shafts and high-strength fasteners.

Hardness28–40 HRC typical

DIN1.7220 (34CrMo4)

AISI4135 (near)

JISSCM435 (near)

CategoryAlloy & Engineering Steel

Chemical composition

Element	Content (%)
C	0.30–0.37
Si	≤0.40
Mn	0.60–0.90
P	≤0.025
S	≤0.035
Cr	0.90–1.20
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)	28–40 HRC typical
Tensile strength	800–1100 MPa (Q&T, EN 10083 section bands)
Density	7.85 g/cm³

Heat treatment

Quench 840–870 °C oil; temper 540–660 °C per EN 10083-3 property bands.

Equivalent grades

Standard	Designation
din	1.7220 (34CrMo4)
aisi	4135 (near)
jis	SCM435 (near)
gb	35CrMo (near)

Compare side by side: 34CrMo4 vs 4135

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

Applications & Processing

Applications: Gas cylinders and pressure parts, shafts, bolts, gears, automotive components.

Processing: As 4135; EN supply is ordered to +QT condition with section-based property guarantees.

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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.