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ASTM A369 Grade FP21 vs. EN 1.4587 Stainless Steel

Both ASTM A369 grade FP21 and EN 1.4587 stainless steel are iron alloys. They have 42% 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 ASTM A369 grade FP21 and the bottom bar is EN 1.4587 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20
34
Fatigue Strength, MPa 160
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
80
Tensile Strength: Ultimate (UTS), MPa 470
540
Tensile Strength: Yield (Proof), MPa 240
250

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Maximum Temperature: Mechanical, °C 470
1100
Melting Completion (Liquidus), °C 1470
1420
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
17
Thermal Expansion, µm/m-K 13
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
36
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 1.8
6.3
Embodied Energy, MJ/kg 23
87
Embodied Water, L/kg 61
230

Common Calculations

PREN (Pitting Resistance) 6.2
43
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
150
Resilience: Unit (Modulus of Resilience), kJ/m3 150
150
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
18
Strength to Weight: Bending, points 17
18
Thermal Diffusivity, mm2/s 11
4.5
Thermal Shock Resistance, points 14
13

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.030
Chromium (Cr), % 2.7 to 3.4
24 to 26
Copper (Cu), % 0
2.0 to 3.0
Iron (Fe), % 94.3 to 96.2
32.7 to 41.9
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.8 to 1.1
4.0 to 5.0
Nickel (Ni), % 0
28 to 30
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.025