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ASTM A369 Grade FP21 vs. EN 1.4584 Stainless Steel

Both ASTM A369 grade FP21 and EN 1.4584 stainless steel are iron alloys. They have 52% 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 1.4584 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
150
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20
34
Fatigue Strength, MPa 160
170
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
79
Tensile Strength: Ultimate (UTS), MPa 470
500
Tensile Strength: Yield (Proof), MPa 240
210

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Maximum Temperature: Mechanical, °C 470
1100
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1430
1390
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 41
17
Thermal Expansion, µm/m-K 13
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
31
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 1.8
5.7
Embodied Energy, MJ/kg 23
78
Embodied Water, L/kg 61
200

Common Calculations

PREN (Pitting Resistance) 6.2
36
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
140
Resilience: Unit (Modulus of Resilience), kJ/m3 150
110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
17
Strength to Weight: Bending, points 17
17
Thermal Diffusivity, mm2/s 11
4.5
Thermal Shock Resistance, points 14
12

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.025
Chromium (Cr), % 2.7 to 3.4
19 to 21
Copper (Cu), % 0
1.0 to 3.0
Iron (Fe), % 94.3 to 96.2
41.7 to 52
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
24 to 26
Nitrogen (N), % 0
0 to 0.2
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 0.020