1050

Data verified

1050 is a medium-high carbon steel whose chemistry matches JIS S50C and EN C50. It is used for wear-exposed shafts, springs of simple form and parts that are flame or induction hardened.

Hardness55+ HRC surface by induction

DIN1.0540 (C50)

AISI1050

JISS50C

CategoryCarbon Steel

Chemical composition

Element	Content (%)
C	0.48–0.55
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	620–740 MPa (normalized, typ.)
Hardness	55+ HRC surface by induction
Density	7.85 g/cm³

Heat treatment

Normalize 840–870 °C; quench 830–850 °C oil/water; flame and induction hardening are standard.

Equivalent grades

Standard	Designation
din	1.0540 (C50)
aisi	1050
jis	S50C
gb	50

Compare side by side: 1050 vs S50C · 1050 vs 1045

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

Applications & Processing

Applications: Shafts, gear rims, spring washers, scraper blades, agricultural tools.

Processing: Machinability fair normalized; welding requires preheat (200–300 °C) and controlled cooling.

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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.