AISI 304H Stainless Steel vs. ASTM A387 Grade 12 Steel
Both AISI 304H stainless steel and ASTM A387 grade 12 steel are iron alloys. They have 72% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is AISI 304H stainless steel and the bottom bar is ASTM A387 grade 12 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 180 | |
140 to 160 |
Elastic (Young's, Tensile) Modulus, GPa | 200 | |
190 |
Elongation at Break, % | 40 | |
25 |
Fatigue Strength, MPa | 200 | |
190 to 230 |
Poisson's Ratio | 0.28 | |
0.29 |
Shear Modulus, GPa | 77 | |
73 |
Shear Strength, MPa | 400 | |
300 to 330 |
Tensile Strength: Ultimate (UTS), MPa | 580 | |
470 to 520 |
Tensile Strength: Yield (Proof), MPa | 230 | |
260 to 310 |
Thermal Properties
Latent Heat of Fusion, J/g | 290 | |
250 |
Maximum Temperature: Mechanical, °C | 960 | |
430 |
Melting Completion (Liquidus), °C | 1430 | |
1470 |
Melting Onset (Solidus), °C | 1380 | |
1420 |
Specific Heat Capacity, J/kg-K | 480 | |
470 |
Thermal Conductivity, W/m-K | 17 | |
44 |
Thermal Expansion, µm/m-K | 16 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
7.2 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 2.8 | |
8.3 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 15 | |
2.8 |
Density, g/cm3 | 7.8 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 3.0 | |
1.6 |
Embodied Energy, MJ/kg | 43 | |
21 |
Embodied Water, L/kg | 150 | |
51 |
Common Calculations
PREN (Pitting Resistance) | 19 | |
2.7 |
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
98 to 110 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 | |
180 to 250 |
Stiffness to Weight: Axial, points | 14 | |
13 |
Stiffness to Weight: Bending, points | 25 | |
24 |
Strength to Weight: Axial, points | 21 | |
16 to 18 |
Strength to Weight: Bending, points | 20 | |
17 to 18 |
Thermal Diffusivity, mm2/s | 4.5 | |
12 |
Thermal Shock Resistance, points | 13 | |
14 to 15 |
Alloy Composition
Carbon (C), % | 0.040 to 0.1 | |
0.050 to 0.17 |
Chromium (Cr), % | 18 to 20 | |
0.8 to 1.2 |
Iron (Fe), % | 66.6 to 74 | |
97 to 98.2 |
Manganese (Mn), % | 0 to 2.0 | |
0.4 to 0.65 |
Molybdenum (Mo), % | 0 | |
0.45 to 0.6 |
Nickel (Ni), % | 8.0 to 10.5 | |
0 |
Phosphorus (P), % | 0 to 0.045 | |
0 to 0.025 |
Silicon (Si), % | 0 to 0.75 | |
0.15 to 0.4 |
Sulfur (S), % | 0 to 0.030 | |
0 to 0.025 |