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ASTM A356 Grade 8 vs. S15700 Stainless Steel

Both ASTM A356 grade 8 and S15700 stainless steel are iron alloys. They have 76% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A356 grade 8 and the bottom bar is S15700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
200 to 460
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
1.1 to 29
Fatigue Strength, MPa 270
370 to 770
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 630
1180 to 1890
Tensile Strength: Yield (Proof), MPa 390
500 to 1770

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 440
870
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 38
16
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
15
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.0
3.4
Embodied Energy, MJ/kg 26
47
Embodied Water, L/kg 55
140

Common Calculations

PREN (Pitting Resistance) 4.7
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
17 to 270
Resilience: Unit (Modulus of Resilience), kJ/m3 390
640 to 4660
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22
42 to 67
Strength to Weight: Bending, points 21
32 to 43
Thermal Diffusivity, mm2/s 10
4.2
Thermal Shock Resistance, points 18
39 to 63

Alloy Composition

Aluminum (Al), % 0
0.75 to 1.5
Carbon (C), % 0 to 0.2
0 to 0.090
Chromium (Cr), % 1.0 to 1.5
14 to 16
Iron (Fe), % 95.4 to 97.4
69.6 to 76.8
Manganese (Mn), % 0.5 to 0.9
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.2
2.0 to 3.0
Nickel (Ni), % 0
6.5 to 7.7
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.2 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.050 to 0.15
0