55SiCr A21553 - GB /T 1222-2025

55SiCr Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.51	1.2	0.5	-	-	0.5	-	-
Maximum Value	0.59	1.6	0.8	0.025	0.02	0.8	0.35	0.2

55SiCr Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %
Quenched in oil at 860±20°C and tempered at 450±50°C	≥1450	ReL ≥1300	≥6	≥25

Approximate Comparison Table Spring Steel

China

Taiwan, China

Japan

South Korea

United States

International Organization for Standardization

Germany

France

Russia

United Kingdom

ISC

CNS

JIS

AISI

UNS

ISO

DIN EN/DIN

W-Nr.

NF EN/NF

GOST

BS EN/BS

55SiCrA

A21553

SUP12

SPS8

9254

G92540

55SiCr6-3

54SiCr6

1.7102

54SiCr6
(55S7)

55С2

54SiCr6

55SiCr Corresponding Standards(Same grade name, different standards)

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!