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ASTM A8 Details

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A8 Application:Cold-Work Tool Steel

Category Type Grade Designations
Grades Tool Die Steels A8 USA - ASTM ,

Chemical composition(wt.%) of A8 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.50 0.60
Si 0.75 1.10
Mn 0.20 0.50
P - 0.030
S - 0.030
Cr 4.75 5.50
Mo 1.15 1.65
V - -
W 1.00 1.50
Ni+Cu - 0.75
Cold-Work Tool Steel

Mechanical properties of grade A8

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)
517 (≥) 658 (≥) 43 32 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 312

Physical properties of grade A8

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
635 (≥) 464 (≥) 14 44 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 113
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
675 277 458

A8 - Form of Supply

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
A 213 S30615 SAE USA
Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
A 240 S30615 SAE USA
Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
A 249 S30615 SAE USA
Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
A 312 S30615 SAE USA
Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
A 959 S30615 SAE USA
Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
S30615 AISI USA
Austenitic Chromium Nickel Silicon Heat Resisting Steel
SA-213 S30615 AMS USA
Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
SA-240 S30615 AMS USA
Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
SA-249 S30615 AMS USA
Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
SA-312 S30615 AMS USA
Specification for Seamless and Welded Austenitic Stainless Steel Pipes
A8 ASTM USA
Cold-Work Tool Steel

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