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ASTM A2 Details

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A2 Application:Cold-Work Tool Steel

Category Type Grade Designations
Grades Tool Die Steels A2 USA - ASTM ,

Chemical composition(wt.%) of A2 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.95 1.05
Si 0.10 0.50
Mn 0.40 1.00
P - 0.030
S - 0.030
Cr 4.75 5.50
Mo 0.90 1.40
V 0.15 0.50
W - -
Ni+Cu - 0.75
Cold-Work Tool Steel

Mechanical properties of grade A2

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)
847 (≥) 544 (≥) 33 34 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 323

Physical properties of grade A2

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
492 (≥) 429 (≥) 22 32 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 431
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
574 567 874

A2 - 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 268 S40800 SAE USA
Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service
A 959 S40800 SAE USA
Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
S40800 AISI USA
Ferritic Chromium Stainless Steel
SA-268 S40800 AMS USA
Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service
NA2 B.S. UK
Specification for nickel-copper alloy castings
NA20 B.S. UK
Specification for nickel and nickel alloys: bar
NA21 B.S. UK
Specification for nickel and nickel alloys: bar
A2 ISO International
Stainless steels - Chemical composition
A2 ASTM USA
Cold-Work Tool Steel
IncoloyA-286 ASTM USA
Creep resisting steels, nickel and cobalt alloys

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