1030

Data verified

1030 is a medium carbon steel at the lower edge of the heat-treatable range: it responds to quenching in thin sections and to induction hardening on shafts. It is a widely used forging steel for automotive and agricultural parts.

Hardness50+ HRC surface by induction (thin sections)

DIN1.0528 (C30)

AISI1030

JISS30C

CategoryCarbon Steel

Chemical composition

Element	Content (%)
C	0.28–0.34
Mn	0.60–0.90
P	≤0.040
S	≤0.050

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

Properties

Tensile strength	470–560 MPa (normalized, typ.)
Hardness	50+ HRC surface by induction (thin sections)
Density	7.85 g/cm³

Heat treatment

Normalize 860–890 °C; quench 850–870 °C water/oil for small sections; induction hardening common.

Equivalent grades

Standard	Designation
din	1.0528 (C30)
aisi	1030
jis	S30C
gb	30

Compare side by side: 1030 vs 1035 · 1030 vs 1025

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

Applications & Processing

Applications: Axles, shafts, connecting rods (light), forged gears, agricultural machinery parts.

Processing: Good machinability normalized; welding needs preheat of 100–200 °C.

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Source: SAE J403 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.