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EN 1.4981 Stainless Steel vs. ASTM A369 Grade FP9

Both EN 1.4981 stainless steel and ASTM A369 grade FP9 are iron alloys. They have 74% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4981 stainless steel and the bottom bar is ASTM A369 grade FP9.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
140
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 39
20
Fatigue Strength, MPa 210
160
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
75
Shear Strength, MPa 420
300
Tensile Strength: Ultimate (UTS), MPa 610
470
Tensile Strength: Yield (Proof), MPa 240
240

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Mechanical, °C 940
600
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 16
26
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
10

Otherwise Unclassified Properties

Base Metal Price, % relative 25
6.5
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.8
2.0
Embodied Energy, MJ/kg 67
28
Embodied Water, L/kg 150
87

Common Calculations

PREN (Pitting Resistance) 22
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
80
Resilience: Unit (Modulus of Resilience), kJ/m3 150
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21
17
Strength to Weight: Bending, points 20
17
Thermal Diffusivity, mm2/s 4.3
6.9
Thermal Shock Resistance, points 14
13

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.15
Chromium (Cr), % 15.5 to 17.5
8.0 to 10
Iron (Fe), % 59.6 to 66.7
87.1 to 90.3
Manganese (Mn), % 0 to 1.5
0.3 to 0.6
Molybdenum (Mo), % 1.6 to 2.0
0.9 to 1.1
Nickel (Ni), % 15.5 to 17.5
0
Niobium (Nb), % 0.4 to 1.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.3 to 0.6
0.5 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030