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ASTM A387 Grade 12 Steel vs. S32950 Stainless Steel

Both ASTM A387 grade 12 steel and S32950 stainless steel are iron alloys. They have 67% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 12 steel and the bottom bar is S32950 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 160
260
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 25
17
Fatigue Strength, MPa 190 to 230
330
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
80
Shear Strength, MPa 300 to 330
480
Tensile Strength: Ultimate (UTS), MPa 470 to 520
780
Tensile Strength: Yield (Proof), MPa 260 to 310
550

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 430
1100
Melting Completion (Liquidus), °C 1470
1430
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 44
16
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
17
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.6
3.4
Embodied Energy, MJ/kg 21
47
Embodied Water, L/kg 51
180

Common Calculations

PREN (Pitting Resistance) 2.7
37
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 110
120
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 250
730
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 16 to 18
28
Strength to Weight: Bending, points 17 to 18
24
Thermal Diffusivity, mm2/s 12
4.3
Thermal Shock Resistance, points 14 to 15
21

Alloy Composition

Carbon (C), % 0.050 to 0.17
0 to 0.030
Chromium (Cr), % 0.8 to 1.2
26 to 29
Iron (Fe), % 97 to 98.2
60.3 to 69.4
Manganese (Mn), % 0.4 to 0.65
0 to 2.0
Molybdenum (Mo), % 0.45 to 0.6
1.0 to 2.5
Nickel (Ni), % 0
3.5 to 5.2
Nitrogen (N), % 0
0.15 to 0.35
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0.15 to 0.4
0 to 0.6
Sulfur (S), % 0 to 0.025
0 to 0.010