PRODUCT NAME :Carbon steel round bar ( forged ,rolled )
STANDARD:
GB/T699-1999 EN10083-2 ISO683-1 EN10250-2
GRADE COMPARISION:

GB	ГОСТ	ASTM	BS	JIS	NF
20Mn	20Г	1021,1022	080A20		XC18

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

C	Si	Mn	P≤	S≤
0.17/0.23	0.17/0.37	0.70/1.0	0.035	0.035

HEAT TREATMENT SPECIFICATION:
tensile strength (MPa)：≥275(28)
Elongation  δ5 (%)：≥24
Reduction of area  ψ (%)：≥50
Hardness ：no heat treatment ≤197HB

MECHANICAL PROPERTIES:
DELIVERY CONDITION :
normalized ,annealed, black surface ,rough machined or quenched & tempered , should be indicated in contract .
DIMENSION : mm
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:
Used for camshaft , gear, coupler ,hinge , pin , towbar, bearing ring etc

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.