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ASTM A387 Grade 9 Steel vs. S42030 Stainless Steel

Both ASTM A387 grade 9 steel and S42030 stainless steel are iron alloys. They have a moderately high 92% 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 ASTM A387 grade 9 steel and the bottom bar is S42030 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 21
16
Fatigue Strength, MPa 160 to 240
250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
76
Shear Strength, MPa 310 to 380
410
Tensile Strength: Ultimate (UTS), MPa 500 to 600
670
Tensile Strength: Yield (Proof), MPa 230 to 350
410

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Mechanical, °C 600
780
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 26
28
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 10
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
10
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.1
2.5
Embodied Energy, MJ/kg 28
34
Embodied Water, L/kg 87
110

Common Calculations

PREN (Pitting Resistance) 12
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 110
92
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 310
440
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18 to 21
24
Strength to Weight: Bending, points 18 to 20
22
Thermal Diffusivity, mm2/s 6.9
7.7
Thermal Shock Resistance, points 14 to 17
24

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.3
Chromium (Cr), % 8.0 to 10
12 to 14
Copper (Cu), % 0
2.0 to 3.0
Iron (Fe), % 87.1 to 90.8
77.6 to 85
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
1.0 to 3.0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030
Vanadium (V), % 0 to 0.040
0