AISI Type O2 Oil-hardening Tool Steel, oil quenched at 800°C, tempered at 260°C Categories:
Metal;; Ferrous Metal; Metal Metal ; Tool Steel; Steel; Cold Work Steel; Steel ; Oil-Hardening Steel
Material Notes: Even intricate sections may be hardened, with good dimensional stability during hardening. Key Words:
UNS T31502, ASTM A681, FED QQ-T-570, SAE J437, SAE J438, DIN 1.2842, A
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Physical Properties Density
Mechanical Properties Pro perties Hardness, Knoop Hardness, Rockwell C
Metric
English
7.61 g/cc
0.275 lb/in ³
Metric 624
English 624
55
55
602
602
Tensile Strength, Ultimate
1930 MPa
280000 psi
Tensile Strength, Yield
1750 MPa
254000 psi
Hardness, Vickers
Comments
Comments Converted from Rockwell C hardness.
Elongation at Break
0.000 %
0.000 %
in 50 mm
Bulk Modulus
140 GPa
20300 ksi
Typical for steel
Izod Impact Unnotched Shear Modulus
Thermal Properties CTE, linear linear
105 J
77.4 ft-lb
80.0 GPa
11600 ksi
Typical for steel
Metric
English
Comments
10.3 µm/m-°C m/m-°C
5.72 µin/in-°F in/in-°F
@Temperature 25.0 - 40.0 °C
@Temperature 77.0 - 104 °F
13.0 µm/m-°C m/m-°C
7.22 µin/in-°F in/in-°F
@Temperature 25.0 - 260 °C
@Temperature 77.0 - 500 °F
14.6 µm/m-°C m/m-°C
8.11 µin/in-°F in/in-°F
@Temp @Te mpe erat rature ure 25.0 - 540 °C
@Temperature 77.0 - 1000 °F
Processing Properties
Metric
English
Comments
Processing Temperature
175 - 260 °C
347 - 500 °F
Tempering Temperature
760 - 800 °C
1400 - 1470 °F
Hardening Temperature
745 - 775 °C
1370 - 1430 °F
Annealing Annealing Temperature Temperature
Component Elements Properties Car bon, bon, C Chromium, Cr
Metric
English
0.85 - 0.95 %
0.85 - 0.95 %
<= 0.35 %
<= 0.35 %
Iron, Fe
96.0 %
96.0 %
Manganese, Mn
1.60 %
1.60 %
Molybdenum, Mo
<= 0.30 %
<= 0.30 %
Phosphorous, P
<= 0.030 %
<= 0.030 %
Silicon, Si Sulfur, S Vanadium, V
<= 0.50 %
<= 0.50 %
<= 0.030 %
<= 0.030 %
<= 0.30 %
<= 0.30 %
Comments
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