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ASTM A225 Steel vs. S15500 Stainless Steel

Both ASTM A225 steel and S15500 stainless steel are iron 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 A225 steel and the bottom bar is S15500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 250
290 to 430
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21 to 23
6.8 to 16
Fatigue Strength, MPa 330 to 390
350 to 650
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
75
Shear Strength, MPa 390 to 520
540 to 870
Tensile Strength: Ultimate (UTS), MPa 620 to 830
890 to 1490
Tensile Strength: Yield (Proof), MPa 460 to 550
590 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
820
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
17
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
13
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.8
2.7
Embodied Energy, MJ/kg 24 to 25
39
Embodied Water, L/kg 48
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 170
98 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 580 to 820
890 to 4460
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22 to 29
32 to 53
Strength to Weight: Bending, points 21 to 25
26 to 37
Thermal Diffusivity, mm2/s 14
4.6
Thermal Shock Resistance, points 18 to 24
30 to 50

Comparable Variants