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

GB	ГОСТ	ASTM	BS	JIS	NF	DIN
30Mn2	30Г2	1330	150M28	SMn433H	32M5	30Mn5

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

CHEMICAL COMPOSITION:

C	Si	Mn	P≤	S≤
0.27/0.34	0.17/0.37	1.4/1.8	0.035	0.035

HEAT TREATMENT SPECIFICATION & MECHANICAL PROPERTIES:
The first tiem quenching temperature （℃）：840, coolant water.
Tensile strenght :σb (MPa)：≥785(80)
Yeild strength σs (MPa)：≥635(65)
elongation δ5 (%)：≥12
Reduction area  ψ (%)：≥45
Impact  Akv (J)：≥63
Hardness （HBS100/3000）（annealed status）：≤207
DELIVERY CONDITION :

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:
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.