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O2

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T31501 T31502
#O2

Description

USA ASTM O2 Alloy tool steel and O2 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: O2
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy O2 ASTM USA Alloy tool steel
D3
T30403
D4
T30404
D5
T30405
D7
T30407
O1
T31501

Chemical composition(mass fraction)(wt.%) of the O2

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Mo(％) V(%)
0.85～0.95 ≤0.50 1.40～1.80 ≤0.030 ≤0.030 ≤0.50 ≤0.30 ≤0.30

Mechanical Properties of steel grade O2

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV/Ku (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
633 (≥) 292 (≥) 21 44 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 423

Physical Properties of steel grade O2

Temperature
(°C)		 Modulus of elasticity
(GPa)		 Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)		 Specific thermal capacity
(J/kg·°C)		 Specific electrical resistivity
(Ω mm²/m)		 Density
(kg/dm³)		 Poisson’s coefficient, ν
14 - -     0.11 -  
674 112 - 31.3 113   -  
422 - 31 31.2   414 444

Heat Treatment of steel grade O2

Heat treated : 1538°C - 1584°C

Technological Curves of steel grade O2

Cross Reference Table (Equivalent Grade) of O2

Grade Standard Country Application
5Cr4W5Mo2V China Alloy tool steel - hot-work die steel
O2 ASTM USA Alloy tool steel
T31502 UNS USA Alloy tool steel
BO2 UK Carbide for cutting tools
BO2 UK Carbide for cutting tools
Ni-Mo28 AFNOR France Special Alloy
Ni-Mo28 AFNOR France Alloy special steel
06Cr17Ni12Mo2 GBT China Stainless steel bars
022Cr17Ni12Mo2 GBT China Stainless steel bars
06Cr17Ni12Mo2Ti GBT China Stainless steel bars
06Cr17Ni12Mo2N GBT China Stainless steel bars
022Cr17Ni12Mo2N GBT China Stainless steel bars
06Cr18Ni12Mo2Cu2 GBT China Stainless steel bars
022Cr18Ni14Mo2Cu2 GBT China Stainless steel bars
022Cr25Ni22Mo2N GBT China Stainless steel bars
06Cr17Ni12Mo2 GBT China Stainless steel bars
07Cr17Ni12Mo2 GBT China Stainless steel bars
06Cr17Ni12Mo2Nb GBT China Stainless steel bars
0Cr17Ni12Mo2 GBT China Stainless steel bars
00Cr17Ni14Mo2 GBT China Stainless steel bars
T31501 T31502
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