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GB 8MnSi Details

Alloy tool steels of 8MnSi

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8MnSi Application:Alloy tool steels
Category Type Grade Designations
Grades Tool Steels & Die Steels 8MnSi China - GB , GB/T 1299 (2000) - Alloy tool steels
Chemical composition(mass fraction)(wt.%)
Elements Min.(≥) Max.(≤)
C 0.75 0.85
Si 0.30 0.60
Mn 0.80 1.10
P - 0.030
S - 0.030
Cr - 0.025
Ni - 0.020
Cu - 0.30
Mechanical properties of grade 8MnSi
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)
382 (≥) 653 (≥) 11 32 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 414
Physical properties of grade 8MnSi
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
745 (≥) 648 (≥) 13 41 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 314
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
571 968 669
8MnSi 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
8MnSi GB China
Alloy tool steels

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