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ASTM A387 Grade 12 Steel vs. AISI 409Cb Stainless Steel

Both ASTM A387 grade 12 steel and AISI 409Cb stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 31 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 ASTM A387 grade 12 steel and the bottom bar is AISI 409Cb stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 25
24
Fatigue Strength, MPa 190 to 230
140
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
75
Shear Strength, MPa 300 to 330
270
Tensile Strength: Ultimate (UTS), MPa 470 to 520
420
Tensile Strength: Yield (Proof), MPa 260 to 310
200

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 430
710
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 44
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
8.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
2.2
Embodied Energy, MJ/kg 21
31
Embodied Water, L/kg 51
94

Common Calculations

PREN (Pitting Resistance) 2.7
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 110
83
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 250
100
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 16 to 18
15
Strength to Weight: Bending, points 17 to 18
16
Thermal Diffusivity, mm2/s 12
6.7
Thermal Shock Resistance, points 14 to 15
15

Alloy Composition

Carbon (C), % 0.050 to 0.17
0 to 0.060
Chromium (Cr), % 0.8 to 1.2
10.5 to 11.7
Iron (Fe), % 97 to 98.2
84.9 to 89.5
Manganese (Mn), % 0.4 to 0.65
0 to 1.0
Molybdenum (Mo), % 0.45 to 0.6
0
Nickel (Ni), % 0
0 to 0.5
Niobium (Nb), % 0
0 to 0.75
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0.15 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.040