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

GB	ГОСТ	ASTM	BS	JIS	DIN
20Mn2	20Г2	1320,1321	150M19	SMn420	20Mn5

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

C	Si	Mn	P≤	S≤	Cr
0.16/0.22	0.15/0.40	1.20/1.60	0.035	0.035	≤0.29

HEAT TREATMENT SPECIFICATION & MECHANICAL PROPERTIES:
Have moderate strength , while cold deformation plasticity higher . Used in gear ,small shaft , piston pin , cross melt etc in automobile and tractor .
Tensile strength ≥785MPa
Yeild strenght ≥590MPa
Enlongation ≥10%
Reduction of area ≥40%
Impact ≥47Aku2/J
Hardness ≤187HB
Temperature temperature :℃ 220 , coolant : water , air . Quenching temperature 850.
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

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.