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S31727 Stainless Steel vs. ASTM A369 Grade FP2

Both S31727 stainless steel and ASTM A369 grade FP2 are iron alloys. They have 59% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is S31727 stainless steel and the bottom bar is ASTM A369 grade FP2.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
130
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
20
Fatigue Strength, MPa 240
160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 430
270
Tensile Strength: Ultimate (UTS), MPa 630
430
Tensile Strength: Yield (Proof), MPa 270
240

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 1010
420
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1390
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 24
2.6
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 4.7
1.6
Embodied Energy, MJ/kg 64
20
Embodied Water, L/kg 180
50

Common Calculations

PREN (Pitting Resistance) 35
2.5
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
75
Resilience: Unit (Modulus of Resilience), kJ/m3 190
150
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22
15
Strength to Weight: Bending, points 20
16
Thermal Shock Resistance, points 14
13

Alloy Composition

Carbon (C), % 0 to 0.030
0.1 to 0.2
Chromium (Cr), % 17.5 to 19
0.5 to 0.81
Copper (Cu), % 2.8 to 4.0
0
Iron (Fe), % 53.7 to 61.3
97.4 to 98.6
Manganese (Mn), % 0 to 1.0
0.3 to 0.61
Molybdenum (Mo), % 3.8 to 4.5
0.44 to 0.65
Nickel (Ni), % 14.5 to 16.5
0
Nitrogen (N), % 0.15 to 0.21
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 1.0
0.1 to 0.3
Sulfur (S), % 0 to 0.030
0 to 0.025