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ASTM O6 Details

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O6 Application:Oil-Hardening Tool Steel

Category Type Grade Designations
Grades Tool Die Steels O6 USA - ASTM ,

Chemical composition(wt.%) of O6 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 1.25 1.55
Si 0.55 1.50
Mn 0.30 1.10
P - 0.030
S - 0.030
Cr - 0.30
Mo 0.20 0.30
V - -
W - -
Ni+Cu - 0.75
Oil-Hardening Tool Steel

Mechanical properties of grade O6

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)
647 (≥) 774 (≥) 44 42 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 243

Physical properties of grade O6

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
185 (≥) 152 (≥) 14 21 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 112
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
263 977 695

O6 - 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
34CrNiMo6 AFNOR France
Steels for quenching and tempering for construction purposes - Technical delivery conditions
O6 ASTM USA
Oil-Hardening Tool Steel
102CrMo6 EN Germany
Alloyed CrMo steel
45SCD6, 46SiCrMo6, 1.8062 AFNOR France
wrought steels used in aeronautical constructions
34CrNiMo6 Whole Whole
Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties

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