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S31803 Stainless Steel vs. ASTM A182 Grade FR

Both S31803 stainless steel and ASTM A182 grade FR are iron alloys. Both are furnished in the annealed condition. They have 70% 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 S31803 stainless steel and the bottom bar is ASTM A182 grade FR.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
170
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 29
28
Fatigue Strength, MPa 370
270
Poisson's Ratio 0.27
0.29
Reduction in Area, % 50
43
Shear Modulus, GPa 80
72
Shear Strength, MPa 460
320
Tensile Strength: Ultimate (UTS), MPa 710
490
Tensile Strength: Yield (Proof), MPa 500
360

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1060
410
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
52
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 17
3.3
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.6
1.6
Embodied Energy, MJ/kg 49
21
Embodied Water, L/kg 160
52

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
120
Resilience: Unit (Modulus of Resilience), kJ/m3 630
340
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
17
Strength to Weight: Bending, points 23
17
Thermal Diffusivity, mm2/s 4.3
14
Thermal Shock Resistance, points 20
14

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.2
Chromium (Cr), % 21 to 23
0
Copper (Cu), % 0
0.75 to 1.3
Iron (Fe), % 63.7 to 71.9
95.2 to 97.3
Manganese (Mn), % 0 to 2.0
0.4 to 1.1
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 4.5 to 6.5
1.6 to 2.2
Nitrogen (N), % 0.080 to 0.2
0
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.020
0 to 0.050