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ASTM A387 Grade 2 Steel vs. N08031 Stainless Steel

Both ASTM A387 grade 2 steel and N08031 stainless steel are iron alloys. They have a modest 35% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 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 ASTM A387 grade 2 steel and the bottom bar is N08031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 25
45
Fatigue Strength, MPa 190 to 250
290
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
81
Shear Strength, MPa 300 to 350
510
Tensile Strength: Ultimate (UTS), MPa 470 to 550
730
Tensile Strength: Yield (Proof), MPa 260 to 350
310

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 420
1100
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 45
12
Thermal Expansion, µm/m-K 13
18

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
39
Density, g/cm3 7.9
8.1
Embodied Carbon, kg CO2/kg material 1.6
7.1
Embodied Energy, MJ/kg 20
96
Embodied Water, L/kg 50
240

Common Calculations

PREN (Pitting Resistance) 2.4
52
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 120
270
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 320
230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16 to 20
25
Strength to Weight: Bending, points 17 to 19
22
Thermal Diffusivity, mm2/s 12
3.1
Thermal Shock Resistance, points 14 to 16
14

Alloy Composition

Carbon (C), % 0.050 to 0.21
0 to 0.015
Chromium (Cr), % 0.5 to 0.8
26 to 28
Copper (Cu), % 0
1.0 to 1.4
Iron (Fe), % 97.1 to 98.3
29 to 36.9
Manganese (Mn), % 0.55 to 0.8
0 to 2.0
Molybdenum (Mo), % 0.45 to 0.6
6.0 to 7.0
Nickel (Ni), % 0
30 to 32
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.025
0 to 0.020
Silicon (Si), % 0.15 to 0.4
0 to 0.3
Sulfur (S), % 0 to 0.025
0 to 0.010