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ASTM A387 Grade 9 Steel vs. N08031 Stainless Steel

Both ASTM A387 grade 9 steel and N08031 stainless 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 ASTM A387 grade 9 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, % 20 to 21
45
Fatigue Strength, MPa 160 to 240
290
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
81
Shear Strength, MPa 310 to 380
510
Tensile Strength: Ultimate (UTS), MPa 500 to 600
730
Tensile Strength: Yield (Proof), MPa 230 to 350
310

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.015
Chromium (Cr), % 8.0 to 10
26 to 28
Copper (Cu), % 0
1.0 to 1.4
Iron (Fe), % 87.1 to 90.8
29 to 36.9
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.1
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 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.025
0 to 0.010
Vanadium (V), % 0 to 0.040
0