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ASTM A356 Grade 8 vs. S41425 Stainless Steel

Both ASTM A356 grade 8 and S41425 stainless steel are iron alloys. They have 81% of their average alloy composition in common. There are 32 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 A356 grade 8 and the bottom bar is S41425 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
280
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
17
Fatigue Strength, MPa 270
450
Poisson's Ratio 0.29
0.28
Reduction in Area, % 50
51
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 630
920
Tensile Strength: Yield (Proof), MPa 390
750

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Maximum Temperature: Mechanical, °C 440
810
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 38
16
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
13
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.0
2.9
Embodied Energy, MJ/kg 26
40
Embodied Water, L/kg 55
120

Common Calculations

PREN (Pitting Resistance) 4.7
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
150
Resilience: Unit (Modulus of Resilience), kJ/m3 390
1420
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22
33
Strength to Weight: Bending, points 21
27
Thermal Diffusivity, mm2/s 10
4.4
Thermal Shock Resistance, points 18
33

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.050
Chromium (Cr), % 1.0 to 1.5
12 to 15
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 95.4 to 97.4
74 to 81.9
Manganese (Mn), % 0.5 to 0.9
0.5 to 1.0
Molybdenum (Mo), % 0.9 to 1.2
1.5 to 2.0
Nickel (Ni), % 0
4.0 to 7.0
Nitrogen (N), % 0
0.060 to 0.12
Phosphorus (P), % 0 to 0.035
0 to 0.020
Silicon (Si), % 0.2 to 0.6
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.0050
Vanadium (V), % 0.050 to 0.15
0