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EN 1.4938 Stainless Steel vs. ASTM A387 Grade 12 Steel

Both EN 1.4938 stainless steel and ASTM A387 grade 12 steel are iron alloys. They have 85% of their average alloy composition in common. There are 31 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 EN 1.4938 stainless steel and the bottom bar is ASTM A387 grade 12 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 16 to 17
25
Fatigue Strength, MPa 390 to 520
190 to 230
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 540 to 630
300 to 330
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
470 to 520
Tensile Strength: Yield (Proof), MPa 640 to 870
260 to 310

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 750
430
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 30
44
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.3

Otherwise Unclassified Properties

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

Common Calculations

PREN (Pitting Resistance) 18
2.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
98 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
180 to 250
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 31 to 37
16 to 18
Strength to Weight: Bending, points 26 to 29
17 to 18
Thermal Diffusivity, mm2/s 8.1
12
Thermal Shock Resistance, points 30 to 35
14 to 15

Alloy Composition

Carbon (C), % 0.080 to 0.15
0.050 to 0.17
Chromium (Cr), % 11 to 12.5
0.8 to 1.2
Iron (Fe), % 80.5 to 84.8
97 to 98.2
Manganese (Mn), % 0.4 to 0.9
0.4 to 0.65
Molybdenum (Mo), % 1.5 to 2.0
0.45 to 0.6
Nickel (Ni), % 2.0 to 3.0
0
Nitrogen (N), % 0.020 to 0.040
0
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.5
0.15 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.025
Vanadium (V), % 0.25 to 0.4
0

Comparable Variants