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
07Cr17Ni7Al	631	X7CrNiAl17-7	SUS631	1.4568

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

CHEMICAL COMPOSITION:

C	Si	Mn	P≤	S≤	Cr	Ni	Al
0.09	1.00	1.00	0.040	0.030	16.00/18.00	6.50/7.75	0.75/1.50

HEAT TREATMENT SPECIFICATION & MECHANICAL PROPERTIES:
Tensile strength : Solid solutionσb (MPa)：≥1030 aging 565℃ ≥1140;  510℃ ≥1230 
Yeild strength σ0.2 (MPa)：≥685
Elongation  δ5 (%)：,≥20
Reduction of area ψ (%)：≥25
Impact  Akv (J)：≥
Hardness ≤229HB,565℃ aging ,≥363HB;510℃ aging ,≥388HB
Annealing  800～900℃ rapid cooling . 
Quenching 1010～1040℃ oil cooling.
Tempering 120-160℃ rapid cooling
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:
Semiaustenitic precipitation hardening stainless steel .its a austenite unstable steel. The steel is austenite structure in solid solution
and indoor temperature condition. Through cold machining ,cold treatment or heat 750℃ , austenite can tranform to martensite, again
doing solid solution .

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.