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EN 1.4525 Stainless Steel vs. ASTM A369 Grade FP91

Both EN 1.4525 stainless steel and ASTM A369 grade FP91 are iron alloys. They have 85% of their average alloy composition in common. There are 30 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 EN 1.4525 stainless steel and the bottom bar is ASTM A369 grade FP91.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 5.6 to 13
19
Fatigue Strength, MPa 480 to 540
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
75
Tensile Strength: Ultimate (UTS), MPa 1030 to 1250
670
Tensile Strength: Yield (Proof), MPa 840 to 1120
460

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Mechanical, °C 860
600
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 18
26
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
10

Otherwise Unclassified Properties

Base Metal Price, % relative 13
7.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.8
2.6
Embodied Energy, MJ/kg 39
37
Embodied Water, L/kg 130
88

Common Calculations

PREN (Pitting Resistance) 18
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 68 to 130
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1820 to 3230
560
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 36 to 45
24
Strength to Weight: Bending, points 29 to 33
22
Thermal Diffusivity, mm2/s 4.7
6.9
Thermal Shock Resistance, points 34 to 41
18

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Carbon (C), % 0 to 0.070
0.080 to 0.12
Chromium (Cr), % 15 to 17
8.0 to 9.5
Copper (Cu), % 2.5 to 4.0
0
Iron (Fe), % 70.4 to 79
87.3 to 90.3
Manganese (Mn), % 0 to 1.0
0.3 to 0.6
Molybdenum (Mo), % 0 to 0.8
0.85 to 1.1
Nickel (Ni), % 3.5 to 5.5
0 to 0.4
Niobium (Nb), % 0 to 0.35
0.060 to 0.1
Nitrogen (N), % 0 to 0.050
0.030 to 0.070
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0 to 0.8
0.2 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.025
Titanium (Ti), % 0
0 to 0.010
Vanadium (V), % 0
0.18 to 0.25
Zirconium (Zr), % 0
0 to 0.010