Spring Flat Bar

• Customization: Available
• Technique: Hot Rolled
• Standard: GB
• Model NO.: 60Si2Mn 50CrVA, 55CrMnA, 60Si2CrA, 51CrV4
• Transport Package: Bare in Package by Steel Wire
• Specification: 60Si2Mn 50CrVA, 55CrMnA, 60Si2CrA, 51CrV4
• Trademark: YONG YANG
• Origin: China
• HS Code: 722840
• Production Capacity: 200000ton/Month

Product Description

 Spring flat bar


Material:  60Si2Mn  50CrVA, 55CrMnA, 60Si2CrA, 51CrV4

Standard: GB/T702-2008
 

Width	50	60	70	80	90	100	120	130	150	160	180
Thickness	6-13	6-25	6-35	6-35	6-40	7-45	8-50	8-40	8-30	10-30	12-27

Our Steel Mill Is Founded in 1993, Located at Handan, Hebei. 

Our mill can produce high quality Spring Steels, Flat Steel Bars, Leaf Springs, which are widely used in automobile industry. 

Warmly welcome Client from all over the world to visit our mill, we can provide most competitive price. 

1.Description

Spring steel refers to steel due to the elasticity in the quenched and tempered condition, and specifically for the manufacture of springs and elastic components. Spring steel depends on its ability to elastically deform, i.e., within the prescribed range, the ability to withstand a certain elastic deformation so that the load does not occur in the permanent deformation after the load is removed.

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2.Application

Spring steel flat bars are widely used on auto fittings, auto manufacturing, hardware tools, chain manufacturing and other machinery manufacturing industry.  Automobile plate spring

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3.Size Ranges

Width: 40mm-150mm; Thickness: 4mm-60mm

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4.All Grades Comparison

GB	ASTM	JIS	ISO	DIN	BS	ANFR	GOST
65#	1065	/	TypeDC,SC	CK67	060A67	XC65	65
70#	1070	/	TypeDC,SC	/	070A72	XC70	70
85#	1086	SUP3	TypeDC,SC	CK85	060A86	XC85	85
65Mn	1066	/	/	/	080A67	/	65Γ
60Si2Mn	9260	SUP6,SUP7	61SiCr7	60SiCr7	Z51A60	60Si7	60C2
60Si2CrA	9254	SUP12	55SiCr63	/	/	/	60C2XA
55CrMnA	5155	SUP9	55Cr3	55Cr3	525A58	55Cr3	/
60CrMnBA	51B60	SUP11A	60CrB3	/	/	/	55XΓP
60CrMnMoA	4161	SUP13A	60CrMo33	60CrMo4	705A60	/	/
50CrVA	6150	SUP10A	51CrV4	50CrV4	735A51	51CrV4	50CrΦA

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5.Quality Standard

GB/T 1222 Spring Steels
JIS G 4801 Spring Steels
EN 10089 Hot rolled steels for quenched and tempered springs

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6.Chemical Composition(%)

Steel Grade	C	Mn	Si	P	S	Cr	Ni	B	Cu	Mo	V
65#	0.62-0.70	0.50-0.80	0.17-0.37	0.035 max	0.035 max	0.25 max	0.25 max	/	0.25 max	/	/
70#	0.62-0.75	0.50-0.80	0.17-0.37	0.035 max	0.035 max	0.25 max	0.25 max	/	0.25 max	/	/
85#	0.82-0.90	0.50-0.80	0.17-0.37	0.035 max	0.035 max	0.25 max	0.25 max	/	0.25 max	/	/
65Mn	0.62-0.70	0.90-1.20	0.17-0.37	0.035 max	0.035 max	0.25 max	0.25 max	/	0.25 max	/	/
60Si2Mn	0.56-0.64	0.70-1.00	1.50-2.00	0.035 max	0.035 max	0.35 max	0.25 max	/	0.25 max	/	/
60Si2CrA	0.56-0.64	0.40-0.70	1.40-1.80	0.025 max	0.025 max	0.70-1.00	0.25 max	/	0.25 max	/	/
55CrMnA	0.52-0.60	0.65-0.95	0.17-0.37	0.025 max	0.025 max	0.65-0.95	0.35 max	/	0.25 max	/	/
60CrMnBA	0.56-0.64	0.70-1.00	0.17-0.37	0.025 max	0.025 max	0.70-1.00	0.35 max	0.0005-0.0040	0.25 max	/	/
60CrMnMoA	0.56-0.64	0.70-1.00	0.17-0.37	0.025 max	0.025 max	0.70-0.90	0.35 max	/	0.25 max	0.25-0.35	/
50CrVA	0.46-0.54	0.50-0.80	0.17-0.37	0.025 max	0.025 max	0.80-1.10	0.35 max	/	0.25 max	/	0.10-0.20

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7.Mechanical Properties(Quenched and Tempered Condition)(T=20°C if not differently stated)

Steel Grade	Tensile Strength Rm (Mpa)	Yield Strength Rp0.2 (Mpa)	Elongation A5 (%)	Area Reduction Ratio C (%)
65#	980 min	785 min	9 min	35 min
70#	1030 min	835 min	8 min	30 min
85#	1130 min	980 min	6 min	30 min
65Mn	980 min	785 min	8 min	30 min
60Si2Mn	1275 min	1180 min	5 min	25 min
60Si2CrA	1765 min	1570 min	6 min	20 min
55CrMnA	1225 min	1080 min	9 min	20 min
60CrMnBA	1225 min	1080 min	9 min	20 min
50CrVA/td>	1275 min	1130 min	10 min	40 min

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8.Heat Treatment

Steel Grade	Quenching Temperature (°C) (	Media	Tempering Temperature (°C)
65#	840	oil	500
70#	830	oil	480
85#	820	oil	480
65Mn	830	oil	540
60Si2Mn	870	oil	480
60Si2CrA	870	oil	420
55CrMnA	830-860	oil	460-510
60CrMnBA	830-860	oil	460-520
50CrVA	850	oil	500