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S82012 Stainless Steel vs. ASTM A369 Grade FP21

Both S82012 stainless steel and ASTM A369 grade FP21 are iron alloys. Both are furnished in the annealed condition. They have 79% of their average alloy composition in common. There are 31 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 S82012 stainless steel and the bottom bar is ASTM A369 grade FP21.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
20
Fatigue Strength, MPa 480
160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
74
Shear Strength, MPa 550
300
Tensile Strength: Ultimate (UTS), MPa 800
470
Tensile Strength: Yield (Proof), MPa 560
240

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Maximum Temperature: Mechanical, °C 950
470
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1380
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
41
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 11
4.0
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.4
1.8
Embodied Energy, MJ/kg 35
23
Embodied Water, L/kg 140
61

Common Calculations

PREN (Pitting Resistance) 24
6.2
Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
80
Resilience: Unit (Modulus of Resilience), kJ/m3 790
150
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 29
17
Strength to Weight: Bending, points 25
17
Thermal Diffusivity, mm2/s 3.9
11
Thermal Shock Resistance, points 23
14

Alloy Composition

Carbon (C), % 0 to 0.050
0.050 to 0.15
Chromium (Cr), % 19 to 20.5
2.7 to 3.4
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 71.3 to 77.9
94.3 to 96.2
Manganese (Mn), % 2.0 to 4.0
0.3 to 0.6
Molybdenum (Mo), % 0.1 to 0.6
0.8 to 1.1
Nickel (Ni), % 0.8 to 1.5
0
Nitrogen (N), % 0.16 to 0.26
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 0.8
0 to 0.5
Sulfur (S), % 0 to 0.0050
0 to 0.025