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EN 1.3956 Stainless Steel vs. ASTM A369 Grade FP91

Both EN 1.3956 stainless steel and ASTM A369 grade FP91 are iron alloys. They have 68% of their average alloy composition in common. There are 26 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 EN 1.3956 stainless steel and the bottom bar is ASTM A369 grade FP91.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 27
19
Fatigue Strength, MPa 240
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
75
Tensile Strength: Ultimate (UTS), MPa 650
670
Tensile Strength: Yield (Proof), MPa 330
460

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Maximum Temperature: Mechanical, °C 1080
600
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Base Metal Price, % relative 22
7.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.8
2.6
Embodied Energy, MJ/kg 68
37
Embodied Water, L/kg 180
88

Common Calculations

PREN (Pitting Resistance) 34
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
110
Resilience: Unit (Modulus of Resilience), kJ/m3 270
560
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23
24
Strength to Weight: Bending, points 21
22
Thermal Shock Resistance, points 18
18

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Carbon (C), % 0 to 0.060
0.080 to 0.12
Chromium (Cr), % 20.5 to 23.5
8.0 to 9.5
Iron (Fe), % 51.9 to 62.1
87.3 to 90.3
Manganese (Mn), % 4.0 to 6.0
0.3 to 0.6
Molybdenum (Mo), % 1.5 to 3.0
0.85 to 1.1
Nickel (Ni), % 11.5 to 13.5
0 to 0.4
Niobium (Nb), % 0.1 to 0.3
0.060 to 0.1
Nitrogen (N), % 0.2 to 0.4
0.030 to 0.070
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0.2 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025
Titanium (Ti), % 0
0 to 0.010
Vanadium (V), % 0.1 to 0.3
0.18 to 0.25
Zirconium (Zr), % 0
0 to 0.010