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S7Application:Alloy tool steel
CategoryTypeSteel gradeStandardCountry
Grades Special Alloy S7ASTMUSA

Chemical composition%of the ladle analysis of gradeS7

C(％)Si(％)Mn(％)P(％)S(％)Cr(％)Mo(％)V(%)
0.45～0.550.20～1.000.20～0.90≤0.030≤0.0303.00～3.501.30～1.80≤0.35
S7
Mechanical properties of gradeS7
Proof strength
Rp0.2(MPa)		Tensile strength
Rm(MPa)		Impact energy
KV(J)		Elongation at fracture
A(%)		Reduction in cross section on fracture
Z(%)		As-Heat-Treated ConditionBrinell hardness(HBW)
917(≥)945(≥)221121Solution and Aging,Annealing,Ausaging,Q+T,etc222
Physical properties of gradeS7
PropertyDensity
kg/dm3		Temperature T
°C/F		Specific heat
J/kgK		Thermal conductivity
W/mK		Electric resistance
µΩ·cm		Modulus of elasticity
kN/mm2		Expansion rate
753(≥)416(≥)132234Solution and Aging,Annealing,Ausaging,Q+T,etc342
Temp.
°C/°F		Creep strain limit
(10000h)
(Rp1,0)N/mm2		Creep rupture strength
(10000h)
(Rp1,0)N/mm2
631512157
S7Range of products
Product typeProductsDimensionProcessesDeliver Status
Plates/SheetsPlates/Sheets0.08-200mm(T)*W*LForging,hot rolling and cold rollingAnnealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting
Steel BarRound Bar,Flat Bar,Square BarΦ8-1200mm*LForging,hot rolling and cold rolling,CastBlack,Rough Turning,Shot Blasting,
Coil/StripSteel Coil/Steel Strip0.03-16.0x1200mmCold-Rolled&Hot-RolledAnnealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting
Pipes/TubesSeamless Pipes/Tubes,Welded Pipes/TubesOD:6-219mm x WT:0.5-20.0mmHot extrusion,Cold Drawn,WeldedAnnealed,Solution and Aging,Q+T,ACID-WASHED
Cross Reference Table(Equivalent Grade)
GradeStandardCountryApplication
304S71ASTMUSA
Specification for carbon, low alloy and stainless steel bars and billets for bolting material to be used in pressure retaining applications
S7ASTMUSA
Shock-Resisting Tool Steel
S75CMASTMUSA
Cold rolled special steel strip

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