PRODUCT NAME :
spring steel round bar / rod / wire

STANDARD:
GB/T1222-2007 ISO 683-14
GRADE COMPARISION:

GB	ГОСТ	ASTM	BS	JIS	NF	DIN
60Si2MnA	60C2ГA	9260	250A61	SUP7	61S7	65Si7

ULTRASONIC STANDARD:
GB/T6402-2008 / SEP921-84.  ASTM A388

CHEMICAL COMPOSITION:

C	Si	Mn	P≤	S≤
0.56/0.64	1.50/2.00	0.60/0.90	0.035	0.035

HEAT TREATMENT SPECIFICATION:
quenching 860℃±20℃, oil cooling;  tempering :460℃±50℃
AC1-755，Ac3-770，Ms-300～305，
Annealing:750C furnace cooling -HBS≤222
Nromalizing : 830～860C air cooling -
MECHANICAL PROPERTIES:
Yield strength: ≥1225(125) (MPa) reduction of area ≥30 (%)  elongation ≥5 (%)  hardness:
Hot rolled ≤321HB
DELIVERY CONDITION :
annealed

DIMENSION : mm

ROUND STEEL BAR		COIL ROD	WIRE	SQUARE/ FLAT
FORGED BAR	ROLLED BAR	HOT ROLLED	COLD DRAW	FORGED	ROLLED
100-700	16-250	∮5.5-20	∮0.2-13	120-800×120-800	5-38×44-150 10-90×60-305

APPLIED RANGE:
Our products are widely used in the manufacture of railway locomotives, automobiles, construction machinery, etc.
REMARK：
Above listed parameters and sepcification only for reference . Specific parameters according to standard. Requirments
beyond standard will be negotiate by both sides .
Delivery state:annealed, spheroidal annealed, quenched & tempered ,bright bar, cold-drawn, etc.
Listed specifications are only typical grades; products of required specifications can be developed/produced per international,
Chinese or industry standards, or based on agreements with customers.