Spring Steel Wire (round bar, flat bar & wire)

Specification of Spring Steel Wire:
1.Grade:

GB	ASTM	JIS	DIN	BS	NF
#45	1045	S45C S48C	C45	-	-
#50	1050	S50C S53C	CK53	060A52	XC48TS
#55	1055	S55C	C55E	-	-
#60	1060	S58C	CK60	-	-
#70	1070	S70C	CK67	070A72	-
65Mn	1066	-	-	-	-
55Si2Mn	9255	-	55Si7	-	-
60Si2Mn	9260	SUP6	60Si7	-	-
60Si2MnA	9260	SUP6	60Si7	-	-
55CrMnA	5155	SUP9	55Cr3	-	-
60CrMnA	5160	SUP9A		-	-
50CrVA	6150	SUP10A	51CrV4	-	-
60CrMnBA	51B60	SUS11	58CrMnB4	-	-

2.Material: 65, 70, 75, 85, 65Mn, 55SiMnV, 60Si2MnA, 60Si2CrA, etc.
3.Diameter:0.02mm-12.0mm
4.Hardness: According to the customer request.
5.Standard:GB4357,DIN17223,JIS G 3521 
6.Finish: NB (standard finish), EB (polished finish), UB (highly polished finish)
7.Surface: Galvanized & Ungalvanized 

High-Carbon Spring Wire
Material	Music Wire ASTM A 228	Hard Drawn ASTM A 277	High Tensile Hard Drawn ASTM A 679	Oil Tempered ASTM A 229	Carbon Valve ASTM A 230
Nominal Analysis	C--.70 - 1.00% Mn--.20 - 60%	C--.45 - .85% Mn--.60 - 1.30%	C-- .65 - 1.00% Mn-- .20 - 1.30%	C-- .55 - .85% Mn-- .60 - 1.20%	C-- .60 - .75% Mn-- .60 - .90%
Minimum Tensile Strength	230-3999	CLI 147-283 CLII 171-324	238-350	CLI 165-293 CLII 191-324	215-240
Modulus of Elasticity E psi x 106	30	30	30	30	30
Design Stress  % Minimum Tensile	45	40	45	45	45
Modulus in Torsion  G psi x 106	11.5	11.5	11.5	11.5	11.5
Maximum Temp. °F	250	250	250	250	250
Maximum Temp. °C	121	121	121	121	121
Rockwell Hardness	C41-60	C31-52	C41-60	C42-55	C45-49
Method of Manufacture Chief Uses Special Properties	Cold drawn. High and uniform tensile. High quality springs and wire forms.	Cold drawn. Average stress applications. Lower cost springs and wire forms.	Cold drawn. Higher quality springs and wire forms.	Cold drawn and heat treated before fabrication, General purpose spring wire.	Cold drawn and heat treated before fabrication. Suitable for cyclic applications.

Chemical Composition of Spring Steel Wire:

Steel Grade	Chemical Composition (%)
	C	Mn	Si	S	P	Cr	Cu	Ni
# 45	0.42-0.50	0.50-0.80	0.17-0.37	≤0.035	≤0.035	≤0.25	≤0.25	≤0.30
# 50	0.47-0.55	0.50-0.80	0.17-0.37	≤0.035	≤0.035	≤0.25	≤0.25	≤0.30
# 55	0.52-0.60	0.50-0.80	0.17-0.37	≤0.035	≤0.035	≤0.25	≤0.25	≤0.30
# 60	0.57-0.65	0.50-0.80	0.17-0.37	≤0.035	≤0.035	≤0.25	≤0.25	≤0.30
# 70	0.67-0.75	0.50-0.80	0.17-0.37	≤0.035	≤0.035	≤0.25	≤0.25	≤0.30
65Mn	0.62-0.70	0.90-1.20	0.17-0.37	≤0.035	≤0.035	≤0.25	-	-
55Si2Mn	0.52-0.60	0.60-0.90	1.50-2.00	≤0.035	≤0.035	≤0.35	-	-
60Si2Mn	0.56-0.64	0.60-0.90	1.50-2.00	≤0.035	≤0.035	≤0.35	-	-
60Si2MnA	0.56-0.64	0.60-0.90	1.60-2.00	≤0.03	≤0.03	≤0.35	-	-
55CrMnA	0.52-0.60	0.65-0.95	0.17-0.37	≤0.03	≤0.03	0.65-0.95	-	-
60CrMnA	0.56-0.64	0.70-1.00	0.17-0.37	≤0.03	≤0.03	0.70-1.00	-	-
50CrVA	0.46-0.54	0.50-0.80	0.17-0.37	≤0.03	≤0.03	0.80-1.10	-	-
60CrMnBA	0.56-0.64	0.70-1.00	0.17-0.37	≤0.03	≤0.03	0.70-1.00	-	-

Features for Spring Steel Wire:

1.High strength increasing bearing capacity. 
2.Good wearing quality. 
3.Quick heat radiation. 
4.Pretty elasticity.    

With these features, steel wire is widely in optical fibre cable, mattress (bed &Sofa) , rib , spring steel wire and many general engineering applications.

Applications of Spring Steel Wire:
Spring Steel is widely in the motor vehicle industry and many general engineering applications. It is suitable for applications that require high strength and toughness. 
Typical applications include: 
- Crankshafts, steering knuckles, gears, spindles and pumps
- Torsion spring
- Breaking spring
- Clockwork spring
- Roller shutter door spring
- Reed of the clutch
- Mattress spring 
- Wiper arm spring, etc.

Packaging of Spring Steel Wire:
SMC Products are packed and labeled according to the regulations and customer's requests. Great care is taken to avoid any damage which might be caused during storage or transportation. In addition, clear labels are tagged on the outside of the packages for easy identification of the product I. D. and quality information.
1)SMC Standard 
2)Customization

SMC provide standard seaworthy packaging to customers, spring wire standard packaging is fixed by wire, wrapped by plastic bag, and placed on wooden pallet, special requirements canbe reached by further discussion.