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ASTM A387 Grade 12 Steel vs. S64512 Stainless Steel

Both ASTM A387 grade 12 steel and S64512 stainless steel are iron alloys. They have 85% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, 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 S64512 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 160
330
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 25
17
Fatigue Strength, MPa 190 to 230
540
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Shear Strength, MPa 300 to 330
700
Tensile Strength: Ultimate (UTS), MPa 470 to 520
1140
Tensile Strength: Yield (Proof), MPa 260 to 310
890

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 430
750
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 44
28
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
4.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
10
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
3.3
Embodied Energy, MJ/kg 21
47
Embodied Water, L/kg 51
110

Common Calculations

PREN (Pitting Resistance) 2.7
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 110
180
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 250
2020
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 16 to 18
40
Strength to Weight: Bending, points 17 to 18
31
Thermal Diffusivity, mm2/s 12
7.5
Thermal Shock Resistance, points 14 to 15
42

Alloy Composition

Carbon (C), % 0.050 to 0.17
0.080 to 0.15
Chromium (Cr), % 0.8 to 1.2
11 to 12.5
Iron (Fe), % 97 to 98.2
80.6 to 84.7
Manganese (Mn), % 0.4 to 0.65
0.5 to 0.9
Molybdenum (Mo), % 0.45 to 0.6
1.5 to 2.0
Nickel (Ni), % 0
2.0 to 3.0
Nitrogen (N), % 0
0.010 to 0.050
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0.15 to 0.4
0 to 0.35
Sulfur (S), % 0 to 0.025
0 to 0.025
Vanadium (V), % 0
0.25 to 0.4