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EN 1.4971 Stainless Steel vs. AISI 440B Stainless Steel

Both EN 1.4971 stainless steel and AISI 440B stainless steel are iron alloys. They have 49% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4971 stainless steel and the bottom bar is AISI 440B stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
3.0 to 18
Fatigue Strength, MPa 270
260 to 850
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
77
Shear Strength, MPa 530
460 to 1110
Tensile Strength: Ultimate (UTS), MPa 800
740 to 1930
Tensile Strength: Yield (Proof), MPa 340
430 to 1860

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 570
390
Maximum Temperature: Mechanical, °C 1100
870
Melting Completion (Liquidus), °C 1460
1480
Melting Onset (Solidus), °C 1410
1370
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
23
Thermal Expansion, µm/m-K 15
10

Otherwise Unclassified Properties

Base Metal Price, % relative 70
9.0
Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 7.6
2.2
Embodied Energy, MJ/kg 110
31
Embodied Water, L/kg 300
120

Common Calculations

PREN (Pitting Resistance) 38
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
57 to 110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
27 to 70
Strength to Weight: Bending, points 23
24 to 45
Thermal Diffusivity, mm2/s 3.4
6.1
Thermal Shock Resistance, points 19
27 to 70

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.75 to 1.0
Chromium (Cr), % 20 to 22.5
16 to 18
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 37.1
78.2 to 83.3
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 2.5 to 3.5
0 to 0.75
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Tungsten (W), % 2.0 to 3.0
0