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S21904 Stainless Steel vs. ZA-12

S21904 stainless steel belongs to the iron alloys classification, while ZA-12 belongs to the zinc alloys. There are 31 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is S21904 stainless steel and the bottom bar is ZA-12.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
89 to 100
Elastic (Young's, Tensile) Modulus, GPa 200
83
Elongation at Break, % 17 to 51
1.6 to 5.3
Fatigue Strength, MPa 380 to 550
73 to 120
Poisson's Ratio 0.28
0.26
Shear Modulus, GPa 78
33
Shear Strength, MPa 510 to 620
240 to 300
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
260 to 400
Tensile Strength: Yield (Proof), MPa 390 to 910
210 to 320

Thermal Properties

Latent Heat of Fusion, J/g 290
120
Maximum Temperature: Mechanical, °C 980
100
Melting Completion (Liquidus), °C 1400
430
Melting Onset (Solidus), °C 1350
380
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 14
120
Thermal Expansion, µm/m-K 17
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
28
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
42

Otherwise Unclassified Properties

Base Metal Price, % relative 15
11
Density, g/cm3 7.7
6.0
Embodied Carbon, kg CO2/kg material 3.0
3.4
Embodied Energy, MJ/kg 43
64
Embodied Water, L/kg 160
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
4.0 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
260 to 620
Stiffness to Weight: Axial, points 14
7.6
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 36
12 to 19
Strength to Weight: Bending, points 23 to 29
15 to 20
Thermal Diffusivity, mm2/s 3.8
43
Thermal Shock Resistance, points 15 to 21
9.4 to 14

Alloy Composition

Aluminum (Al), % 0
10.5 to 11.5
Cadmium (Cd), % 0
0 to 0.0060
Carbon (C), % 0 to 0.040
0
Chromium (Cr), % 19 to 21.5
0
Copper (Cu), % 0
0.5 to 1.2
Iron (Fe), % 59.5 to 67.4
0 to 0.075
Lead (Pb), % 0
0 to 0.0060
Magnesium (Mg), % 0
0.015 to 0.030
Manganese (Mn), % 8.0 to 10
0
Nickel (Ni), % 5.5 to 7.5
0 to 0.020
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0 to 0.060
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
0 to 0.0030
Zinc (Zn), % 0
87.1 to 89