**20g**Application:China structural steel and alloy steel
Category	Type	Steel grade	Standard	Country
Grades	Special Alloy	20g	GBT	China

Chemical composition%of the ladle analysis of grade20g

C(％)	Si(％)	Mn(％)	P(％)	S(％)
Max 0.20	0.15-0.30	0.50-0.90	0.035	0.035

20g

Mechanical properties of grade20g
Proof strength R_p0.2(MPa)	Tensile strength R_m(MPa)	Impact energy KV(J)	Elongation at fracture A(%)	Reduction in cross section on fracture Z(%)	As-Heat-Treated Condition	Brinell hardness(HBW)
687(≥)	916(≥)	14	42	42	Solution and Aging,Annealing,Ausaging,Q+T,etc	424

Physical properties of grade20g
Property	Density kg/dm3	Temperature T °C/F	Specific heat J/kgK	Thermal conductivity W/mK	Electric resistance µΩ·cm	Modulus of elasticity kN/mm2
829(≥)	787(≥)	34	11	24	Solution and Aging,Annealing,Ausaging,Q+T,etc	443
Temp. °C/°F	Creep strain limit (10000h) (Rp1,0)N/mm2	Creep rupture strength (10000h) (Rp1,0)N/mm2
815	127	789

20gRange of products
Product type	Products	Dimension	Processes	Deliver Status
Plates/Sheets	Plates/Sheets	0.08-200mm(T)WL	Forging,hot rolling and cold rolling	Annealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting
Steel Bar	Round Bar,Flat Bar,Square Bar	Φ8-1200mm*L	Forging,hot rolling and cold rolling,Cast	Black,Rough Turning,Shot Blasting,
Coil/Strip	Steel Coil/Steel Strip	0.03-16.0x1200mm	Cold-Rolled&Hot-Rolled	Annealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting
Pipes/Tubes	Seamless Pipes/Tubes,Welded Pipes/Tubes	OD:6-219mm x WT:0.5-20.0mm	Hot extrusion,Cold Drawn,Welded	Annealed,Solution and Aging,Q+T,ACID-WASHED

Cross Reference Table(Equivalent Grade)
Grade	Standard	Country	Application
X120Mn12, 1.3401, A128, X110Mn14	GBT	China	X120Mn12, 1.3401, A128, X110Mn14 High-manganese steels with austenitic structure, characterized by high carbon content - on average 1.00-1.20%, and high Manganese content - approx.

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