C75S 1.1248 - EN 10132-2021

Grade	C75S
European Standard Steel Grade	1.1248
Corresponding Standard	EN 10132-2021 Cold rolled narrow steel strip for heat treatment - Technical delivery conditions
Classification	Spring Steel

C75S Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	More
Minimum Value	0.7	0.15	0.6	-	-	-	-	-	-	Cr+Mo+Ni≤0.63
Maximum Value	0.8	0.35	0.9	0.025	0.025	0.4	0.4	0.3	0.1	Cr+Mo+Ni≤0.63

① Elements not quoted in this table shall not be intentionally added to the steel without the agreement of the purchaser, other than for the purpose of finishing the heat. All reasonable precautions shall be taken to prevent the addition, from scrap or other material used in manufacture, of such elements which affect the hardenability, mechanical properties and application.

C75S Mechanical Properties

Delivery condition*	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
annealed (+A) or annealed and skin passed(+LC)	≤640	≤510	≥15	HV ≤200
cold rolled(+CR)**	≤1170			HV ≤320
quenched and tempered(QT)***	1200~1900			HV 370~580

• The elongation values in the table are for a gauge length of 80 mm.
• +A=annealed，+LC=annealed and skin passed，+CR=cold rolled，+QT=quenched and tempered

Approximate Comparison Table Spring Steel

United States		Germany		France	European Standard		Russia	Sweden	United Kingdom
AISI	UNS	DIN EN/DIN	W-Nr.	NF EN/NF	EN	Numerical Grade	GOST	SS₁₄	BS EN/BS
1078	G10780	Ck75	1.1248	C75RR	C75S	1.1248	75A	1774	CS80

C75S Corresponding Standards(Same grade name, different standards)

1	EN 10132-4-2002
	C75S 1.1248
2	DIN EN 10132-4-2000(+AC:2002)
	C75S 1.1248
3	EN 10132-2021
	C75S 1.1248
4	GB /T 959.1-2017
	C75S

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