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C75 C75s CK75 SAE 1075 1.1248 Cold rolled spring steel strip

C75 C75s CK75 SAE 1075 1.1248 Cold rolled spring steel strip

C75 C75s CK75 SAE 1075 spring steel strip widely used for auto parts, springs, band saws, stamping parts and etc

Classification: Products

Classification: Spring Steel strip

Classification: Annealed Steel strip

Classification: Hardened and Tempered steel strip

Key Word: spring steel strip steel coils ck75 1075 steel strips steel sae 1075

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C75 C75s CK75 SAE 1075 1.1248 Cold rolled spring steel strip

C75 C75s CK75 SAE 1075 1.1248 Cold rolled spring steel strip

1,Delivery Conditions:

Delivery Condition	Sizes	Surface	Edge
1.Cold Rolled	1.Thickness: 0.09-8mm	Bright / Polished / Blue/Yellow	Slit
2.Cold Rolled+Hydrogen Annealed	2.Width: 6-450mm		Round
3.Cold Rolled+Hardened+Tempered	Coil insider diameter: 300-800mm		Square

2, Grades comparision:

GRADES COMPARISON FOR SPRING STEEL
CHINA GB/T	USA ASTM	JAPAN JIS	GERMANY DIN	FRANCE NF	BIRTAIN BS	ISO	KOREA KS	TAIWAN CNS
45	1045	S45C	CK45	XC45		C45
50	1050	S50C	CK50	XC50	080M50	C50
60	1060	S60C	CK60	XC60	060A62	C60
67	1067	S67C	CK67	XS67		S67
70	1070	S70C	CK70	XS70		S70
75	1075	S75C	CK75	XC75		C75
T10	W1-9	SK4
T9	W1-8	SK5
SK85	---	SK85
40Mn	1043	SWRH42B	40Mn4	40M5	080A40	SL,SM
42Mn
65Mn	1566	S60C-CSP	CK67		080A67	C60E4
55Si2Mn	9255	SUP 6 SUP7	55Si7	55Si7	251H60	55SiCr7
60Si2Mn	9260	SUP 6 SUP7	65Si7	65Si7	251H60	61SiCr7	SUP3	SUP6
62Si2Mn
75Cr1		75Cr1	75Cr1	75Cr1
51CrV4	5160	SUP9A	51CrV4	51CrV4			SPS5A	SUP9A
30CrMo	G41300	SUP13	35CrMo4				SPS9	SUP13
50CrVA	6150	SUP10	51CrV4	51CrV4	735A51	51CrV4	SPS6	SUP10
D6A
X32			X32CrMoV4-1

3,Chemical Composition:

Grade (EN)	Grade (ASTM)	Chemical Composition（%）
Grade (EN)	Grade (ASTM)	C	Si	Mn	P	S	Cr	Ni	Cu	V	Mo
C45S	1045	0.42～0.50	0.17～0.37	0.50～0.80	≤0.035	≤0.035	≤0.25	≤0.3	≤0.25
C50S	1050	0.47～0.55	0.17～0.37	0.50～0.80	≤0.035	≤0.035	≤0.25	≤0.3	≤0.25
C55S	1055	0.52～0.60	0.17～0.37	0.50～0.80	≤0.035	≤0.035	≤0.25	≤0.3	≤0.25
C60S	1060	0.57～0.65	0.17～0.37	0.50～0.80	≤0.035	≤0.035	≤0.25	≤0.3	≤0.25
C67S	1067	0.62～0.70	0.17～0.37	0.50～0.80	≤0.035	≤0.035	≤0.25	≤0.3	≤0.25
C70S	1070	0.67～0.75	0.17～0.37	0.50～0.80	≤0.035	≤0.035	≤0.25	≤0.3	≤0.25
C75S	1075	0.72～0.80	0.17～0.37	0.50～0.80	≤0.035	≤0.035	≤0.25	≤0.3	≤0.25
C100	1095	0.95～1.04	≤0.35	≤0.40	≤0.035	≤0.03	≤0.25	≤0.2	≤0.3
65Mn	65Mn	0.62～0.70	0.17～0.37	0.90～1.20	≤0.035	≤0.035	≤0.25	≤0.3	≤0.25
SK85/SK5	SK85/SK5	0.80 ~0.90	≤0.35	≤0.50	≤0.03	≤0.03	≤0.2	≤0.25	≤0.3
SK4	SK95	0.95～1.04	≤0.35	≤0.40	≤0.035	≤0.03	≤0.25	≤0.2	≤0.3
51CrV4	51CrV4	0.47～0.55	0.17～0.37	0.80～1.10	≤0.035	≤0.035	0.90～1.20	≤0.3	≤0.3	0.10～0.20
75Cr1	75Cr1	0.7～0.8	0.25～0.5	0.50～0.70	≤0.035	≤0.035	0.30～0.40
55Si2Mn	55Si2Mn	0.52～0.60	1.50～2.00	0.60～0.90	≤0.035	≤0.035	≤0.35	≤0.35	≤0.25
60si2Mn	60si2Mn	0.56～0.64	1.50～2.00	0.60～0.90	≤0.035	≤0.035	≤0.35	≤0.35	≤0.25
D6A	D6A	0.42～0.55	0.10～0.30	0.60～0.90	≤0.025	≤0.015	0.90～1.20	0.40～0.70		0.05～0.25	0.85～1.10

4, Our Tolerances:

THICKNESS TOLERNACES
Nominal Thickness (mm)		W < 125			125 <= W
Nominal Thickness (mm)		A	B	C	A	B	C
0,15~0,25	TS EN	±0,015	±0,012	±0,008	±0,020	±0,015	±0,010
0,15~0,25	YONGLI STEEL	±0,008			±0,010
0,25~0,40	TS EN	±0,020	±0,015	±0,010	±0,025	±0,020	±0,012
0,25~0,40	YONGLI STEEL	±0,010			±0,012
0,40~0,60	TS EN	±0,025	±0,020	±0,012	±0,030	±0,025	±0,015
0,40~0,60	YONGLI STEEL	±0,015			±0,015
0,60~1,00	TS EN	±0,030	±0,025	±0,015	±0,035	±0,030	±0,020
0,60~1,00	YONGLI STEEL	±0,015			±0,020
1,00~1,50	TS EN	±0,035	±0,030	±0,020	±0,040	±0,035	±0,025
1,00~1,50	YONGLI STEEL	±0,020			± 0,025
1,50~2,50	TS EN	±0,040	±0,035	±0,025	±0,050	±0,040	±0,030
1,50~2,50	YONGLI STEEL	±0,025			±0,030
2,50~4,00	TS EN	±0,050	±0,040	±0,030	±0,060	±0,050	±0,035
2,50~4,00	YONGLI STEEL	±0,030			±0,035
Please contact us if you have any special requirements.


WIDTH TOLERANCES FOR SLIT EDGE (GK)
Width Tolerances TS EN 10140		Production Width (mm)
Nominal Thickness (mm)		W < 125		125 <= W <= 250		250 < W
Nominal Thickness (mm)		A	B	A	B	A	B
0,2 ~ 0,6	TS EN	± 0,15	± 0,10	± 0,20	± 0,13	± 0,25	± 0,18
0,2 ~ 0,6	YONGLI STEEL	± 0,10		± 0,13		± 0,18
0,6 ~ 1,5	TS EN	± 0,20	± 0,13	± 0,25	± 0,18	± 0,30	± 0,20
0,6 ~ 1,5	YONGLI STEEL	± 0,13		± 0,18		± 0,20
1,5 ~ 2,5	TS EN	± 0,25	± 0,18	± 0,30	± 0,20	± 0,35	± 0,25
1,5 ~ 2,5	YONGLI STEEL	± 0,18		± 0,20		± 0,25
2,5 ~ 4,0	TS EN	± 0,30	± 0,20	± 0,35	± 0,25	± 0,40	± 0,30
2,5 ~ 4,0	YONGLI STEEL	± 0,20		± 0,25		± 0,30

5, Applications:

Product standard	Applications	S50C(CK50/1050)	- Measuring tape
65Si2Mn	- Springs		- Structural parts of cameras
50CrV4	- Springs		- Chain parts
51CrV4	- Springs		- Springs
SK4 (1095)	- Measuring tape		- Clutch parts
	- Razor blades		- Washers
	- Pen points		- Safety buckles
	- Wind-up springs	S55C(CK55/1050)	- Springs
	- Springs		- Safety shoes
	- Cutlery		- Can openers
	- Knitting needles		- Thompson blades
SK5 (1085)	- Measuring tape		- Structural parts of cameras
	- Gauges	S60C(CK60/1060)	- Chain parts
	- Springs		- Hand saws for woodworking
	- Cutlery		- Safety shoes
	- Knitting needles		- Springs
	- Band saws for woodworking		- Office equipment parts
	and lumbering		- Washers
	- Round saws	S65C(65MN/CK67)	- Safety shoes
	- Office equipment parts		- Clutch parts
S45C(CK45/1045)	- Clutch parts		- Springs
	- Chain parts		- Washers
	- Retainers	S75C(CK75/1075)	- Clutch parts
	- Washers		- Springs
S50C(CK50/1050)	- Measuring tape		- Band saws
S50C(CK50/1050)	- Structural parts of cameras

5, Our Mill:

-Cold rolling mill 2HI, 4HI, 6HI-- 7 sets

-Cold rolling Mill 20Hi 1 set

-Annlealing Furnace Hydrogen -36 sets

-Lead quenching lines-3 sets ， Water quenching lines-10 sets

-Slitting machines-8 sets

-Pinch pass mill : 6 sets

-Our warehouse

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