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S31655 Stainless Steel vs. ZA-8

S31655 stainless steel belongs to the iron alloys classification, while ZA-8 belongs to the zinc alloys. There are 32 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is S31655 stainless steel and the bottom bar is ZA-8.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
87 to 100
Elastic (Young's, Tensile) Modulus, GPa 200
85 to 86
Elongation at Break, % 39
1.3 to 8.0
Fatigue Strength, MPa 300
51 to 100
Poisson's Ratio 0.28
0.26
Rockwell B Hardness 88
54 to 65
Shear Modulus, GPa 78
34
Shear Strength, MPa 490
240 to 280
Tensile Strength: Ultimate (UTS), MPa 710
210 to 370
Tensile Strength: Yield (Proof), MPa 350
210 to 290

Thermal Properties

Latent Heat of Fusion, J/g 290
110
Maximum Temperature: Mechanical, °C 1010
100
Melting Completion (Liquidus), °C 1430
400
Melting Onset (Solidus), °C 1380
380
Specific Heat Capacity, J/kg-K 480
440
Thermal Conductivity, W/m-K 15
120
Thermal Expansion, µm/m-K 16
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
28
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
40

Otherwise Unclassified Properties

Base Metal Price, % relative 17
11
Density, g/cm3 7.8
6.3
Embodied Carbon, kg CO2/kg material 3.3
3.3
Embodied Energy, MJ/kg 46
62
Embodied Water, L/kg 160
420

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
2.8 to 28
Resilience: Unit (Modulus of Resilience), kJ/m3 310
260 to 490
Stiffness to Weight: Axial, points 14
7.5
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 25
9.3 to 17
Strength to Weight: Bending, points 23
12 to 18
Thermal Diffusivity, mm2/s 4.0
42
Thermal Shock Resistance, points 16
7.6 to 13

Alloy Composition

Aluminum (Al), % 0
8.0 to 8.8
Cadmium (Cd), % 0
0 to 0.0060
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 19.5 to 21.5
0
Copper (Cu), % 0 to 1.0
0.8 to 1.3
Iron (Fe), % 63.2 to 71.9
0 to 0.075
Lead (Pb), % 0
0 to 0.0060
Magnesium (Mg), % 0
0.015 to 0.030
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 0.5 to 1.5
0
Nickel (Ni), % 8.0 to 9.5
0 to 0.020
Nitrogen (N), % 0.14 to 0.25
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0 to 0.045
Sulfur (S), % 0 to 0.015
0
Tin (Sn), % 0
0 to 0.0030
Zinc (Zn), % 0
89.7 to 91.2