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S20910 Stainless Steel vs. ASTM A356 Grade 8

Both S20910 stainless steel and ASTM A356 grade 8 are iron alloys. They have 61% of their average alloy composition in common. There are 30 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 S20910 stainless steel and the bottom bar is ASTM A356 grade 8.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230 to 290
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 14 to 39
21
Fatigue Strength, MPa 310 to 460
270
Poisson's Ratio 0.28
0.29
Reduction in Area, % 56 to 62
50
Shear Modulus, GPa 79
73
Tensile Strength: Ultimate (UTS), MPa 780 to 940
630
Tensile Strength: Yield (Proof), MPa 430 to 810
390

Thermal Properties

Latent Heat of Fusion, J/g 300
260
Maximum Temperature: Mechanical, °C 1080
440
Melting Completion (Liquidus), °C 1420
1470
Melting Onset (Solidus), °C 1380
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 13
38
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 22
3.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.8
2.0
Embodied Energy, MJ/kg 68
26
Embodied Water, L/kg 180
55

Common Calculations

PREN (Pitting Resistance) 34
4.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 260
110
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 1640
390
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 33
22
Strength to Weight: Bending, points 24 to 27
21
Thermal Diffusivity, mm2/s 3.6
10
Thermal Shock Resistance, points 17 to 21
18

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.2
Chromium (Cr), % 20.5 to 23.5
1.0 to 1.5
Iron (Fe), % 52.1 to 62.1
95.4 to 97.4
Manganese (Mn), % 4.0 to 6.0
0.5 to 0.9
Molybdenum (Mo), % 1.5 to 3.0
0.9 to 1.2
Nickel (Ni), % 11.5 to 13.5
0
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 0.75
0.2 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.1 to 0.3
0.050 to 0.15