Oil Tempered Steel Wire

Description

Oil tempered steel wire is widely used for springs that require extremely high resistance to fatigue, heat, and permanent set in fatigue, including the valve springs of the engine, clutch springs, and suspension springs that are considered important security parts of automobiles. Our high-quality oil tempered wire has a large share in both domestic and overseas markets.

Our customers choose oil tempered high carbon steel wire for their custom spring and custom wire form manufacturing projects because it is inexpensive, readily available, and easy to work with.

High Tensile Strength Quality

Some important springs and severely worn springs that work under high stress fatigue performance, such as spring rings, shock absorption springs, brake springs, coil springs for automobiles, locomotives, and tractors, cylinder safety valve springs, etc.

Standard	Chemical Composition, % by mass
Grade	C	Si	Mn	P max.	S max.	Cu max.	Cr	V
EN10270-2	FD SiCr	0.50-0.60	1.20-1.60	0.50-0.90	0.030	0.025	0.12	0.50-0.80
EN10270-2	FD SiCrV	0.50-0.70	1.20-1.65	0.40-0.90	0.020	0.020	0.10	0.50-1.00	0.10-0.25

Grade	Diameter (mm)	T/S (Mpa)	R/A %
SiCr	8.00-17.00	1850-1950	≥35
SiCr	8.00-17.00	1950-2050	≥35
SiCrV	8.00-15.00	2000-2100	≥35

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Carbon Steel Spring Wire for Static

For statically stressed springs and springs working in the ﬁnite life range.

Standard	Chemical Composition, % by mass
Standard	Grade	C	Si	Mn	P max.	S max.	Cu max.	Ni max.
EN10270-2	FDC	0.60-0.75	0.15-0.35	0.50-1.20	0.030	0.025	0.12
ASTM A229		0.55-0.85	0.15-0.35	0.30-1.20	0.040	0.050
JIS G 3560	SWO-B	0.53-0.88	0.10-0.35	0.30-1.20	0.030	0.030
GB/T 18983	FDC	0.60-0.75	0.17-0.37	0.90-1.20	0.030	0.030	0.25	0.35

Silicon-Chromium Spring Wire for Static

For statically stressed springs or springs working in the ﬁnite life range, requiring strength at elevated temperatures (up to approx. 250 °C).

Standard	Chemical Composition, % by mass
Standard	Grade	C	Si	Mn	P max.	S max.	Cu max.	Cr	Ni max.
EN10270-2	FD SiCr	0.50-0.60	1.20-1.60	0.50-0.90	0.030	0.025	0.12	0.50-0.80
ASTM A401		0.51-0.59	1.20-1.60	0.60-0.80	0.035	0.040		0.60-0.80
JIS G 3560	SWOSC-B	0.51-0.59	1.20-1.60	0.50-0.90	0.035	0.035		0.55-0.90
GB/T 18983	FD SiCr	0.51-0.59	1.20-1.60	0.50-0.80	0.025	0.020	0.25	0.50-0.80	0.35

Chromium -Vanadium Spring Wire for Static

The round, oil quenched and tempered alloy steel wire FD CrV is used mainly for static torsion loaded springs (tension and compression springs).

Standard	Chemical Composition, % by mass
Grade	C	Si	Mn	P max.	S max.	Cu max.	Cr	V	Ni max.
EN10270-2	FDCrV	0.62-0.72	0.15-0.30	0.50-0.90	0.030	0.025	0.12	0.40-0.60	0.15-0.25
GB/T 18983	FD CrV	0.46-0.54	0.17-0.37	0.50-0.80	0.025	0.02	0.25	0.80-1.10	0.10-0.20	0.35

Silicon-Chromium-Vanadium Spring Wire for Static

For statically stressed springs or springs working in the ﬁnite life range, requiring strength at elevated temperatures (up to approx. 250 °C).

Standard	Chemical Composition, % by mass
Grade	C	Si	Mn	P max.	S max.	Cu max.	Cr	V
EN10270-2	FD SiCrV	0.50-0.70	1.20-1.65	0.40-0.90	0.030	0.025	0.12	0.50-1.00	0.10-0.25

Carbon Steel Spring Wire for Medium Fatigue

For the manufacture of mechanical springs that can withstand moderate fatigue stresses over somerelatively low number of cycles, such as required for clutch springs.

Standard	Chemical Composition, % by mass
Grade	C	Si	Mn	P max.	S max.	Cu max.	Ni max.
EN10270-2	TDC	0.60-0.75	0.15-0.35	0.50-1.20	0.200	0.200	0.10
GB/T 18983	TDC	0.60-0.75	0.17-0.37	0.90-1.20	0.030	0.030	0.25	0.35

Silicon- Chromium Spring Wire for Medium Fatigue

For coil springs subjected to moderate dynamic stresses, such as clutch springs or springs requiring similar moderate fatigue resistance as well as high tensile strength and excellent relaxation properties at elevated temperatures (up to approx. 250 °C).

Standard	Chemical Composition, % by mass
Standard	Grade	C	Si	Mn	P max.	S max.	Cu max.	Cr	Ni max.
EN10270-2	TD SiCr	0.50-0.60	1.20-1.60	0.50-0.90	0.025	0.020	0.10	0.50-0.80
ASTM A1000	Grade A	0.51-0.59	1.20-1.60	0.50-0.80	0.025	0.025		0.60-0.80
GB/T 18983	FD SiCr	0.51-0.59	1.20-1.60	0.50-0.80	0.025	0.020	0.25	0.50-0.80	0.35

Chromium -Vanadium Spring Wire for Medium Fatigue

For the manufacture of mechanicalsprings that can withstand moderate fatigue stresses over somerelatively low number of cycles, such as required for clutch springs.

Standard	Chemical Composition, % by mass
Standard	Grade	C	Si	Mn	P max.	S max.	Cu max.	Cr	V	Ni max.
EN10270-2	TD CrV	0.62-0.72	0.15-0.30	0.50-0.90	0.025	0.020	0.10	0.40-0.60	0.15-0.25
ASTM A231		0.48-0.53	0.15-0.35	0.70-0.90	0.035	0.040		0.80-1.10	0.15 min.
ASTM A1000	Grade C	0.60-0.70	0.15-0.30	0.50-0.90	0.025	0.025		0.35-0.60	0.15-0.25
GB/T 18983	TD CrV	0.46-0.54	0.17-0.37	0.50-0.80	0.025	0.02	0.25	0.80-1.10	0.10-0.20	0.35

Silicon-Chromium-Vanadium Spring Wire for Medium Fatigue

Standard	Chemical Composition, % by mass
Grade	C	Si	Mn	P max.	S max.	Cu max.	Cr	V
EN10270-2	TD SiCrV	0.50-0.70	1.20-1.65	0.40-0.90	0.020	0.020	0.10	0.50-1.00	0.10-0.25
ASTM A1000	Grade D	0.55-0.68	1.20-1.65	0.50-0.90	0.025	0.025		0.50-0.80	0.08-0.25

Carbon Valve Spring Quality

For statically stressed springs or springs working in the ﬁnite life range, requiring strength at elevated temperatures (up to approx. 250 °C).

Standard	Chemical Composition, % by mass
Standard	Grade	C	Si	Mn	P max.	S max.	Cu max.	Ni max.	V
EN10270-2	VDC	0.60-0.75	0.15-0.30	0.50-1.00	0.020	0.020	0.06
ASTM A230		0.60-0.75	0.15-0.35	0.60-0.90	0.025	0.030
JIS G 3561	SWO-V	0.60-0.75	0.12-0.32	0.60-0.90	0.025	0.025	0.20
GB/T 18983	VDC	0.60-0.75	0.17-0.37	0.90-1.20	0.030	0.030	0.25	0.35

Chromium-Vanadium Alloy Valve Spring Quality

Chromium-vanadium are designed for springs that must withstand considerable shock and extreme heat. Valve spring quality chrome vanadium has been eddy current tested to assure the finest possible surface in keeping with automotive industry requirements.

Standard	Chemical Composition, % by mass
Standard	Grade	C	Si	Mn	P max.	S max.	Cu max.	Cr	V
EN10270-2	VD CrV	0.62-0.72	0.15-0.30	0.50-0.90	0.025	0.020	0.06	0.40-0.60	0.15-0.35
ASTM A232		0.48-0.53	0.15-0.35	0.70-0.90	0.020	0.035		0.80-1.10	0.15 min.
JIS G 3561	SWOCV-V	0.45-0.55	0.15-0.35	0.65-0.95	0.025	0.025	0.20	0.80-1.10	0.15-0.35
GB/T 18983		0.46-0.54	0.17-0.37	0.50-0.80	0.025	0.020	0.25	0.80-1.10	0.10-0.20

Silicon-Chromium Alloy Valve Spring Quality

Standard	Chemical Composition, % by mass
Standard	Grade	C	Si	Mn	P max.	S max.	Cu max.	Cr	V
EN10270-2	VD CrV	0.62-0.72	0.15-0.30	0.50-0.90	0.025	0.020	0.06	0.40-0.60	0.15-0.35
ASTM A232		0.48-0.53	0.15-0.35	0.70-0.90	0.020	0.035		0.80-1.10	0.15 min.
JIS G 3561	SWOCV-V	0.45-0.55	0.15-0.35	0.65-0.95	0.025	0.025	0.20	0.80-1.10	0.15-0.35
GB/T 18983		0.46-0.54	0.17-0.37	0.50-0.80	0.025	0.020	0.25	0.80-1.10	0.10-0.20

Silicon-Chromium-Vanadium Alloy Valve Spring Quality

Especially suitable for coil springs subjected to high dynamic stresses requiring good fatigue resistance (e.g., valve springs), as well as for springs which require high tensile strength and excellent relaxation properties at moderately elevated working temperatures (up to approx. 250 °C).

Standard	Chemical Composition, % by mass
Standard	Grade	C	Si	Mn	P max.	S max.	Cu max.	Cr	V	Ni max.
EN10270-2	VD SiCrV	0.50-0.70	1.20-1.65	0.40-0.90	0.020	0.020	0.06	0.50-1.00	0.10-0.25
ASTM A877	Grade B	0.55-0.70	1.20-1.65	0.50-0.80	0.025	0.025			0.08-0.25
GB/T 18983	VD SiCrV	0.62-0.70	1.20-1.60	0.50-0.80	0.025	0.020	0.12	0.50-0.80	0.10-0.20	0.035

Silicon-Manganese Steel Spring Wire

60Si2Mn (=60SiCr7=SUP7=9260) spring steel is a silicon manganese spring steel which is widely used. Its strength, elasticity and hardenability are slightly higher than 55Si2Mn. In the 60Si2Mn spring steel industry, flat springs bearing heavy loads or coil springs with wire diameter less than 30mm can be manufactured, and it is also suitable for making heat-resistant springs in non-corrosive media with working temperature below 250 ℃, large and important coil springs bearing alternating loads and working under high stress, as well as automobile damping systems.

Standard	Chemical Composition, % by mass
Standard	Grade	C	Si	Mn	P max.	S max.	Cu max.	Ni max.
GB/T 18983	FD SiMn /TD SiMn	0.56-0.64	1.50-2.00	0.70-1.00	0.025	0.020	0.25	0.35
JISG 3560	SWOSM	0.56-0.64	1.50-1.80	0.70-1.00	0.035	0.035	0.30

FDSiMn /TDSiMn in GB/T 18983-2017
Size Range (mm)	Tensile Strength (Mpa)	Reduction of Area %		Size Range (mm)	Tensile Strength (Mpa)	Reduction of Area %
Size Range (mm)	Tensile Strength (Mpa)	FD	TD	Size Range (mm)	Tensile Strength (Mpa)	FD	TD
0.80-1.60	1850-2100	45	45	5.00-5.60	1660-1810	35	40
1.60-2.00	1820-2000	45	45	5.60-6.00	1650-1800	35	40
2.00-2.50	1800-1950	45	45	6.00-6.50	1640-1790	35	40
2.50-2.70	1780-1930	45	45	6.50-7.00	1630-1780	35	40
3.00-3.20	1740-1890	40	45	7.00-8.00	1620-1770	35	40
3.20-3.50	1720-1870	40	45	8.00-9.00	1610-1760	30	35
3.50-4.00	1710-1860	40	45	9.00-10.00	1600-1750	30	35
4.00-4.20	1700-1850	40	45	10.00-12.00	1580-1730	30	35
4.20-4.50	1690-1840	40	45	12.00-14.00	1560-1710	30	35
4.50-4.70	1680-1830	40	45	14.00-15.00	1550-1700	30	35
4.70-5.00	1670-1820	35	45

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