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ASTM A182 Grade F12 Class 2 vs. AISI 321H Stainless Steel

Both ASTM A182 grade F12 class 2 and AISI 321H stainless steel are iron alloys. Both are furnished in the annealed condition. They have 72% 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 ASTM A182 grade F12 class 2 and the bottom bar is AISI 321H stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 22
40
Fatigue Strength, MPa 220
200
Poisson's Ratio 0.29
0.28
Reduction in Area, % 34
51
Shear Modulus, GPa 73
77
Shear Strength, MPa 340
400
Tensile Strength: Ultimate (UTS), MPa 540
580
Tensile Strength: Yield (Proof), MPa 310
230

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 430
940
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 43
15
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
16
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
3.2
Embodied Energy, MJ/kg 21
46
Embodied Water, L/kg 52
140

Common Calculations

PREN (Pitting Resistance) 2.8
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
190
Resilience: Unit (Modulus of Resilience), kJ/m3 260
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
21
Strength to Weight: Bending, points 19
20
Thermal Diffusivity, mm2/s 12
4.0
Thermal Shock Resistance, points 16
12

Alloy Composition

Carbon (C), % 0.1 to 0.2
0.040 to 0.1
Chromium (Cr), % 0.8 to 1.3
17 to 19
Iron (Fe), % 96.4 to 98.3
65.4 to 74
Manganese (Mn), % 0.3 to 0.8
0 to 2.0
Molybdenum (Mo), % 0.44 to 0.65
0
Nickel (Ni), % 0
9.0 to 12
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0.1 to 0.6
0 to 0.75
Sulfur (S), % 0 to 0.040
0 to 0.030
Titanium (Ti), % 0
0 to 0.7