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SAE-AISI A2 Steel vs. ASTM A387 Grade 22L Class 1

Both SAE-AISI A2 steel and ASTM A387 grade 22L class 1 are iron alloys. They have a very high 95% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A2 steel and the bottom bar is ASTM A387 grade 22L class 1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
74
Tensile Strength: Ultimate (UTS), MPa 710 to 2040
500

Thermal Properties

Latent Heat of Fusion, J/g 260
260
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 38
40
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.2
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 9.5
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 5.5
3.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.7
1.7
Embodied Energy, MJ/kg 38
23
Embodied Water, L/kg 73
58

Common Calculations

PREN (Pitting Resistance) 8.9
5.6
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 73
18
Strength to Weight: Bending, points 23 to 46
18
Thermal Diffusivity, mm2/s 10
11
Thermal Shock Resistance, points 25 to 71
14

Alloy Composition

Carbon (C), % 1.0 to 1.1
0 to 0.1
Chromium (Cr), % 4.8 to 5.5
2.0 to 2.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 89.4 to 93.3
95.2 to 96.8
Manganese (Mn), % 0 to 1.0
0.3 to 0.6
Molybdenum (Mo), % 0.9 to 1.4
0.9 to 1.1
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025
Vanadium (V), % 0.15 to 0.5
0