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ASTM A229 Spring Steel vs. SAE-AISI 1008 Steel

Both ASTM A229 spring steel and SAE-AISI 1008 steel are iron alloys. They have a very high 99% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is ASTM A229 spring steel and the bottom bar is SAE-AISI 1008 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 490 to 550
93 to 100
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14
22 to 33
Fatigue Strength, MPa 710 to 790
150 to 220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Shear Strength, MPa 1020 to 1140
220 to 230
Tensile Strength: Ultimate (UTS), MPa 1690 to 1890
330 to 370
Tensile Strength: Yield (Proof), MPa 1100 to 1230
190 to 310

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 50
62
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
6.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
7.9

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
1.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 19
18
Embodied Water, L/kg 46
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
78 to 91
Resilience: Unit (Modulus of Resilience), kJ/m3 3260 to 4080
92 to 260
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 60 to 67
12 to 13
Strength to Weight: Bending, points 40 to 43
13 to 15
Thermal Diffusivity, mm2/s 14
17
Thermal Shock Resistance, points 54 to 60
10 to 12

Alloy Composition

Carbon (C), % 0.55 to 0.85
0 to 0.1
Iron (Fe), % 97.5 to 99
99.31 to 99.7
Manganese (Mn), % 0.3 to 1.2
0.3 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.050
0 to 0.050

Comparable Variants