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ASTM A229 Spring Steel vs. ZA-12

ASTM A229 spring 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 (5, in this case) are not shown.

For each property being compared, the top bar is ASTM A229 spring steel and the bottom bar is ZA-12.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 490 to 550
89 to 100
Elastic (Young's, Tensile) Modulus, GPa 190
83
Elongation at Break, % 14
1.6 to 5.3
Fatigue Strength, MPa 710 to 790
73 to 120
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 72
33
Shear Strength, MPa 1020 to 1140
240 to 300
Tensile Strength: Ultimate (UTS), MPa 1690 to 1890
260 to 400
Tensile Strength: Yield (Proof), MPa 1100 to 1230
210 to 320

Thermal Properties

Latent Heat of Fusion, J/g 250
120
Maximum Temperature: Mechanical, °C 400
100
Melting Completion (Liquidus), °C 1450
430
Melting Onset (Solidus), °C 1410
380
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 50
120
Thermal Expansion, µm/m-K 12
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
28
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
42

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
11
Density, g/cm3 7.8
6.0
Embodied Carbon, kg CO2/kg material 1.4
3.4
Embodied Energy, MJ/kg 19
64
Embodied Water, L/kg 46
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
4.0 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 3260 to 4080
260 to 620
Stiffness to Weight: Axial, points 13
7.6
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 60 to 67
12 to 19
Strength to Weight: Bending, points 40 to 43
15 to 20
Thermal Diffusivity, mm2/s 14
43
Thermal Shock Resistance, points 54 to 60
9.4 to 14

Alloy Composition

Aluminum (Al), % 0
10.5 to 11.5
Cadmium (Cd), % 0
0 to 0.0060
Carbon (C), % 0.55 to 0.85
0
Copper (Cu), % 0
0.5 to 1.2
Iron (Fe), % 97.5 to 99
0 to 0.075
Lead (Pb), % 0
0 to 0.0060
Magnesium (Mg), % 0
0.015 to 0.030
Manganese (Mn), % 0.3 to 1.2
0
Nickel (Ni), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0.15 to 0.35
0 to 0.060
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 0
0 to 0.0030
Zinc (Zn), % 0
87.1 to 89

Comparable Variants