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N08031 Stainless Steel vs. ASTM A387 Grade 9 Steel

Both N08031 stainless steel and ASTM A387 grade 9 steel are iron alloys. They have 44% of their average alloy composition in common. 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 N08031 stainless steel and the bottom bar is ASTM A387 grade 9 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 45
20 to 21
Fatigue Strength, MPa 290
160 to 240
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 81
75
Shear Strength, MPa 510
310 to 380
Tensile Strength: Ultimate (UTS), MPa 730
500 to 600
Tensile Strength: Yield (Proof), MPa 310
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Maximum Temperature: Mechanical, °C 1100
600
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1390
1410
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 12
26
Thermal Expansion, µm/m-K 18
13

Otherwise Unclassified Properties

Base Metal Price, % relative 39
6.5
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 7.1
2.1
Embodied Energy, MJ/kg 96
28
Embodied Water, L/kg 240
87

Common Calculations

PREN (Pitting Resistance) 52
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
83 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 230
140 to 310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 25
18 to 21
Strength to Weight: Bending, points 22
18 to 20
Thermal Diffusivity, mm2/s 3.1
6.9
Thermal Shock Resistance, points 14
14 to 17

Alloy Composition

Carbon (C), % 0 to 0.015
0 to 0.15
Chromium (Cr), % 26 to 28
8.0 to 10
Copper (Cu), % 1.0 to 1.4
0
Iron (Fe), % 29 to 36.9
87.1 to 90.8
Manganese (Mn), % 0 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 6.0 to 7.0
0.9 to 1.1
Nickel (Ni), % 30 to 32
0
Nitrogen (N), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.020
0 to 0.025
Silicon (Si), % 0 to 0.3
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.025
Vanadium (V), % 0
0 to 0.040