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EN 1.4008 Stainless Steel vs. EN 1.4971 Stainless Steel

Both EN 1.4008 stainless steel and EN 1.4971 stainless steel are iron alloys. They have 46% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.4008 stainless steel and the bottom bar is EN 1.4971 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 17
34
Fatigue Strength, MPa 300
270
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
81
Tensile Strength: Ultimate (UTS), MPa 670
800
Tensile Strength: Yield (Proof), MPa 500
340

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 390
570
Maximum Temperature: Mechanical, °C 760
1100
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 25
13
Thermal Expansion, µm/m-K 11
15

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
70
Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 2.1
7.6
Embodied Energy, MJ/kg 30
110
Embodied Water, L/kg 100
300

Common Calculations

PREN (Pitting Resistance) 14
38
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
220
Resilience: Unit (Modulus of Resilience), kJ/m3 630
280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
26
Strength to Weight: Bending, points 22
23
Thermal Diffusivity, mm2/s 6.7
3.4
Thermal Shock Resistance, points 23
19

Alloy Composition

Carbon (C), % 0 to 0.1
0.080 to 0.16
Chromium (Cr), % 12 to 13.5
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Iron (Fe), % 81.8 to 86.8
24.3 to 37.1
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0.2 to 0.5
2.5 to 3.5
Nickel (Ni), % 1.0 to 2.0
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.015
Tungsten (W), % 0
2.0 to 3.0