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ASTM A356 Grade 9 vs. S64512 Stainless Steel

Both ASTM A356 grade 9 and S64512 stainless steel are iron alloys. Both are furnished in the heat treated (HT) condition. They have 86% of their average alloy composition in common. There are 32 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 9 and the bottom bar is S64512 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
330
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17
17
Fatigue Strength, MPa 310
540
Poisson's Ratio 0.29
0.28
Reduction in Area, % 50
34
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 670
1140
Tensile Strength: Yield (Proof), MPa 460
890

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Maximum Temperature: Mechanical, °C 440
750
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
28
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
4.1

Otherwise Unclassified Properties

Base Metal Price, % relative 3.6
10
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.4
3.3
Embodied Energy, MJ/kg 33
47
Embodied Water, L/kg 56
110

Common Calculations

PREN (Pitting Resistance) 4.7
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
180
Resilience: Unit (Modulus of Resilience), kJ/m3 570
2020
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24
40
Strength to Weight: Bending, points 22
31
Thermal Diffusivity, mm2/s 11
7.5
Thermal Shock Resistance, points 19
42

Alloy Composition

Carbon (C), % 0 to 0.2
0.080 to 0.15
Chromium (Cr), % 1.0 to 1.5
11 to 12.5
Iron (Fe), % 95.2 to 97.2
80.6 to 84.7
Manganese (Mn), % 0.5 to 0.9
0.5 to 0.9
Molybdenum (Mo), % 0.9 to 1.2
1.5 to 2.0
Nickel (Ni), % 0
2.0 to 3.0
Nitrogen (N), % 0
0.010 to 0.050
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0.2 to 0.6
0 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.025
Vanadium (V), % 0.2 to 0.35
0.25 to 0.4