PRODUCT NAME :
stainless steel
STANDARD:
GB/T1220-2007 GB/T1221-2007 GB/T20878-2007 ASTM A959-04 ISO4955:2005 ISO683-13 ISO683-16 EN10088:1-1995 EN10095-1999
GRADE COMPARISION:

GB	ASTM	BS	JIS	DIN
40Cr10Si2Mo		X40CrSiMo10	SUH3	1.4731

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

CHEMICAL COMPOSITION:

C	Si	Mn	P≤	S≤	Cr	Mo
0.35/0.45	1.90/2.60	≤0.70	0.035	0.03	9.00/10.50	0.70/0.90

HEAT TREATMENT SPECIFICATION & MECHANICAL PROPERTIES:
Tensile strength : σb (MPa)：≥885
Yeild strength σ0.2 (MPa)：≥685
Elongation  δ5 (%)：,≥10
Reduction of area ψ (%)：≥35
Impact  Akv (J)：≥
Hardness ≤269HB
Annealing  800～900℃ rapid cooling . 
Quenching 1010～1040℃ oil cooling.
Tempering 120-160℃ rapid cooling.
Metallographic structure :martensite 
DELIVERY CONDITION :

DIMENSION : mm

ROUND STEEL BAR		COIL ROD	WIRE	SQUARE/ FLAT
FORGED BAR	ROLLED BAR	HOT ROLLED	COLD DRAW	FORGED	ROLLED
100-350	16-250	∮5.5-20	∮0.2-13	120-800×120-800	5-38×44-150 10-90×60-305

APPLIED RANGE:
Used make inlet valve of internal combustion engine .vent valve of light load engine 
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.