**G637.40**Application:The Czech republic Structural steel
Category	Type	Steel grade	Standard	Country
Grades	Special Alloy	G637.40	CSN	Czech Republic

Chemical composition%of the ladle analysis of gradeG637.40

C(％)	Si(％)	Mn(％)	Cr(％)	W(%)	Co(%)
1.20-1.60	Max 2.00	Max 0.60	27.0-31.0	3.50-5.00	9.00-11.5

G637.40

Mechanical properties of gradeG637.40
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)
599(≥)	916(≥)	42	24	11	Solution and Aging,Annealing,Ausaging,Q+T,etc	112

Physical properties of gradeG637.40
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
274(≥)	692(≥)	43	42	31	Solution and Aging,Annealing,Ausaging,Q+T,etc	421
Temp. °C/°F	Creep strain limit (10000h) (Rp1,0)N/mm2	Creep rupture strength (10000h) (Rp1,0)N/mm2
912	731	811

G637.40Range 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
G4000	CSN	Czech Republic	Used in the products of the automobile, truck, tractor, and allied industries. Diesel engine castings, liners, cylinders, and pistons.
G4000a	CSN	Czech Republic	Used in the products of the automobile, truck, tractor, and allied industries. Diesel engine castings, liners, cylinders, and pistons.
GH1040	CSN	Czech Republic	Classification and designation for superalloys and high temperature intermetallic materials
GH1140	CSN	Czech Republic	Classification and designation for superalloys and high temperature intermetallic materials
GH4033	CSN	Czech Republic	Classification and designation for superalloys and high temperature intermetallic materials
GH4037	CSN	Czech Republic	Classification and designation for superalloys and high temperature intermetallic materials
GH4043	CSN	Czech Republic	Classification and designation for superalloys and high temperature intermetallic materials
GH4049	CSN	Czech Republic	Classification and designation for superalloys and high temperature intermetallic materials
S20400	CSN	Czech Republic	S20400
XM-31	CSN	Czech Republic	Chemical compositions of SAE wrought stainless steels
S21400	CSN	Czech Republic	Chemical compositions of SAE wrought stainless steels
A 240 Type XM-29	CSN	Czech Republic	Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
A 249 TPXM-29	CSN	Czech Republic	Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
A 269 TPXM-29	CSN	Czech Republic	Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
A 276 XM-29	CSN	Czech Republic	Stainless Steel Bars and Shapes
A 312 TPXM-29	CSN	Czech Republic	Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
A 314 XM-29	CSN	Czech Republic	Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
A 358 XM-29	CSN	Czech Republic	Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General Applications
A 412 Type XM-29	CSN	Czech Republic	Stainless and Heat-Resisting Chromium-Nickel-Manganese Steel Plate, Sheet, and Strip
A 479 XM-29	CSN	Czech Republic	Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels