PRODUCT NAME :
alloy structure steel
STANDARD:
GB/T3077-1999 EN10083-1 EN10083-3   ISO 683-1
GRADE COMPARISION:

GB	ASTM	BS	JIS	DIN
12CrNi3		655M13	SNC815	15NiCr13

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

CHEMICAL COMPOSITION:

C	Si	Mn	P≤	S≤	Cr	Ni
0.10/0.17	0.17/0.37	0.30/0.60	0.035	0.035	0.60/0.90	2.75/3.15

HEAT TREATMENT SPECIFICATION & MECHANICAL PROPERTIES:

DELIVERY CONDITION :
Quenching temperature （℃）：860
Tensile strength σb (MPa)：≥930(95)
Yeild strength σs (MPa)：≥685(70)7
elongation δ5 (%)：≥11
Reduction area  ψ (%)：≥50 
Impact  Akv (J)：≥ 71
Hardness ：≤217
normalized ,annealed, black surface ,rough machined or quenched & tempered , should be indicated in contract .

DIMENSION : mm

ROUND STEEL BAR		COIL ROD	WIRE	SQUARE/ FLAT
FORGED BAR	ROLLED BAR	HOT ROLLED	COLD DRAW	FORGED	ROLLED
80-650	16-250	∮5.5-20	∮0.2-13	120-800×120-800	5-38×44-150 10-90×60-305

length : forged bar free length 4-5.8M,rolled bar 5.8M. for customers special requirment, the bar length can do 20 meters long.
APPLIED RANGE:
widely used advanced carburizing steel . Strength , plasticity, hardenability higher.  Main used for make pricipal axle which require high
strength high hardness high toughness in heavy load condition. And  shaft ,stick , all kinds of transmission gear , adjusting screw, camshaft.
REMARK：
Above listed parameters and sepcification only for reference . Specific parameters according to standard. Requirments beyond standard will
be negotiated 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 as per international, Chinese or
industry standards,or based on agreements with customers.