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Chemical composition % of the ladle analysis of grade X40CrSiMo10-2

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Mo(％)
0.35-0.45 2.00-3.00 Max 0.80 Max 0.040 Max 0.030 9.50-11.50 0.80-1.30
X40CrSiMo10-2
Mechanical properties of grade X40CrSiMo10-2
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 Condition Brinell hardness (HBW)
998 (≥) 685 (≥) 32 22 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 213
Physical properties of grade X40CrSiMo10-2
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		 Expansion rate
131 (≥) 246 (≥) 31 11 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 334
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
253 822 636
X40CrSiMo10-2 Range of products
Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L 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
X40CrSiMo10-2
Valve steels and alloys for internal combustion engines
1.4731
Valve steels and alloys for internal combustion engines

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