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ASTM A369 Grade FP91 vs. EN 1.4578 Stainless Steel

Both ASTM A369 grade FP91 and EN 1.4578 stainless steel are iron alloys. They have 76% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ASTM A369 grade FP91 and the bottom bar is EN 1.4578 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 19
51
Fatigue Strength, MPa 320
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77
Shear Strength, MPa 410
400
Tensile Strength: Ultimate (UTS), MPa 670
550
Tensile Strength: Yield (Proof), MPa 460
200

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Mechanical, °C 600
930
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 26
14
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
19
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.6
3.7
Embodied Energy, MJ/kg 37
51
Embodied Water, L/kg 88
160

Common Calculations

PREN (Pitting Resistance) 13
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
220
Resilience: Unit (Modulus of Resilience), kJ/m3 560
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
19
Strength to Weight: Bending, points 22
19
Thermal Diffusivity, mm2/s 6.9
3.9
Thermal Shock Resistance, points 18
12

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Carbon (C), % 0.080 to 0.12
0 to 0.040
Chromium (Cr), % 8.0 to 9.5
16.5 to 17.5
Copper (Cu), % 0
3.0 to 3.5
Iron (Fe), % 87.3 to 90.3
62.3 to 68.5
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.85 to 1.1
2.0 to 2.5
Nickel (Ni), % 0 to 0.4
10 to 11
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0 to 0.1
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0.2 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.015
Titanium (Ti), % 0 to 0.010
0
Vanadium (V), % 0.18 to 0.25
0
Zirconium (Zr), % 0 to 0.010
0