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ASTM A229 Spring Steel vs. S15500 Stainless Steel

Both ASTM A229 spring steel and S15500 stainless steel are iron alloys. They have 77% of their average alloy composition in common. 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 S15500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 490 to 550
290 to 430
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14
6.8 to 16
Fatigue Strength, MPa 710 to 790
350 to 650
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
75
Shear Strength, MPa 1020 to 1140
540 to 870
Tensile Strength: Ultimate (UTS), MPa 1690 to 1890
890 to 1490
Tensile Strength: Yield (Proof), MPa 1100 to 1230
590 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
820
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1410
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 50
17
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
13
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
2.7
Embodied Energy, MJ/kg 19
39
Embodied Water, L/kg 46
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
98 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 3260 to 4080
890 to 4460
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 60 to 67
32 to 53
Strength to Weight: Bending, points 40 to 43
26 to 37
Thermal Diffusivity, mm2/s 14
4.6
Thermal Shock Resistance, points 54 to 60
30 to 50

Alloy Composition

Carbon (C), % 0.55 to 0.85
0 to 0.070
Chromium (Cr), % 0
14 to 15.5
Copper (Cu), % 0
2.5 to 4.5
Iron (Fe), % 97.5 to 99
71.9 to 79.9
Manganese (Mn), % 0.3 to 1.2
0 to 1.0
Nickel (Ni), % 0
3.5 to 5.5
Niobium (Nb), % 0
0.15 to 0.45
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.030

Comparable Variants