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ASTM A369 Grade FP5 vs. S21603 Stainless Steel

Both ASTM A369 grade FP5 and S21603 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 69% 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 ASTM A369 grade FP5 and the bottom bar is S21603 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
200
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20
45
Fatigue Strength, MPa 160
360
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
79
Shear Strength, MPa 300
490
Tensile Strength: Ultimate (UTS), MPa 470
690
Tensile Strength: Yield (Proof), MPa 240
390

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 510
990
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 13
17

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
17
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.7
3.6
Embodied Energy, MJ/kg 23
50
Embodied Water, L/kg 69
160

Common Calculations

PREN (Pitting Resistance) 6.8
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
270
Resilience: Unit (Modulus of Resilience), kJ/m3 140
380
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 17
25
Strength to Weight: Bending, points 17
22
Thermal Shock Resistance, points 13
15

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.030
Chromium (Cr), % 4.0 to 6.0
17.5 to 22
Iron (Fe), % 92.1 to 95.3
57.6 to 67.8
Manganese (Mn), % 0.3 to 0.6
7.5 to 9.0
Molybdenum (Mo), % 0.45 to 0.65
2.0 to 3.0
Nickel (Ni), % 0
5.0 to 7.0
Nitrogen (N), % 0
0.25 to 0.5
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 0.75
Sulfur (S), % 0 to 0.025
0 to 0.030