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EN 1.4658 Stainless Steel vs. ASTM A387 Grade 12 Steel

Both EN 1.4658 stainless steel and ASTM A387 grade 12 steel are iron alloys. They have 60% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4658 stainless steel and the bottom bar is ASTM A387 grade 12 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
140 to 160
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 28
25
Fatigue Strength, MPa 530
190 to 230
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 81
73
Shear Strength, MPa 580
300 to 330
Tensile Strength: Ultimate (UTS), MPa 900
470 to 520
Tensile Strength: Yield (Proof), MPa 730
260 to 310

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
430
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
44
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Base Metal Price, % relative 25
2.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.5
1.6
Embodied Energy, MJ/kg 61
21
Embodied Water, L/kg 200
51

Common Calculations

PREN (Pitting Resistance) 49
2.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
98 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 1280
180 to 250
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32
16 to 18
Strength to Weight: Bending, points 26
17 to 18
Thermal Diffusivity, mm2/s 4.3
12
Thermal Shock Resistance, points 24
14 to 15

Alloy Composition

Carbon (C), % 0 to 0.030
0.050 to 0.17
Chromium (Cr), % 26 to 29
0.8 to 1.2
Cobalt (Co), % 0.5 to 2.0
0
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 50.9 to 63.7
97 to 98.2
Manganese (Mn), % 0 to 1.5
0.4 to 0.65
Molybdenum (Mo), % 4.0 to 5.0
0.45 to 0.6
Nickel (Ni), % 5.5 to 9.5
0
Nitrogen (N), % 0.3 to 0.5
0
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0 to 0.5
0.15 to 0.4
Sulfur (S), % 0 to 0.010
0 to 0.025