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ACI-ASTM CA15M Steel vs. AISI 304H Stainless Steel

Both ACI-ASTM CA15M steel and AISI 304H stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CA15M steel and the bottom bar is AISI 304H stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 20
40
Fatigue Strength, MPa 330
200
Poisson's Ratio 0.28
0.28
Reduction in Area, % 34
51
Shear Modulus, GPa 76
77
Tensile Strength: Ultimate (UTS), MPa 690
580
Tensile Strength: Yield (Proof), MPa 510
230

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 390
420
Maximum Temperature: Mechanical, °C 760
960
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1410
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 27
17
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
15
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.1
3.0
Embodied Energy, MJ/kg 29
43
Embodied Water, L/kg 100
150

Common Calculations

PREN (Pitting Resistance) 15
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
190
Resilience: Unit (Modulus of Resilience), kJ/m3 670
130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
21
Strength to Weight: Bending, points 22
20
Thermal Diffusivity, mm2/s 7.2
4.5
Thermal Shock Resistance, points 25
13

Alloy Composition

Carbon (C), % 0 to 0.15
0.040 to 0.1
Chromium (Cr), % 11.5 to 14
18 to 20
Iron (Fe), % 82.1 to 88.4
66.6 to 74
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0.15 to 1.0
0
Nickel (Ni), % 0 to 1.0
8.0 to 10.5
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 0.65
0 to 0.75
Sulfur (S), % 0 to 0.040
0 to 0.030