PRODUCT NAME :
spring  steel round bar / rod / wire

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

GB	ГОСТ	ASTM	BS	JIS	NF	DIN
50CrVA	50XΦA	6150	735A50	SUP10	50CV4	50CrV4

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

CHEMICAL COMPOSITION:

C	Si	Mn	P≤	S≤
2.00/2.30	≤0.40	≤0.40	0.03	0.03
0.47/0.54	0.17/0.37	0.50/0.80	0.025	0.025

HEAT TREATMENT SPECIFICATION:
Hot rolled coil rod annealed or not .cold drawn wire annealed.
Quenching :850℃±20℃,oil cooling , tempering 500℃±50℃
MECHANICAL PROPERTIES:
Tensile strength:σb (MPa)：≥1274(130)
Yield strength:σs (MPa)：≥1127(115)
Elongation:δ5 (%)：≥10
Reduction of area :ψ (%)：≥40
Hardness :≤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:
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.