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EN 1.4971 Stainless Steel vs. EN 1.4021 Stainless Steel

Both EN 1.4971 stainless steel and EN 1.4021 stainless steel are iron alloys. They have 45% 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 1.4971 stainless steel and the bottom bar is EN 1.4021 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
11 to 17
Fatigue Strength, MPa 270
240 to 380
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
76
Shear Strength, MPa 530
390 to 530
Tensile Strength: Ultimate (UTS), MPa 800
630 to 880
Tensile Strength: Yield (Proof), MPa 340
390 to 670

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Maximum Temperature: Corrosion, °C 570
390
Maximum Temperature: Mechanical, °C 1100
760
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
30
Thermal Expansion, µm/m-K 15
11

Otherwise Unclassified Properties

Base Metal Price, % relative 70
7.0
Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 7.6
1.9
Embodied Energy, MJ/kg 110
27
Embodied Water, L/kg 300
100

Common Calculations

PREN (Pitting Resistance) 38
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
88 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 280
400 to 1160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
23 to 31
Strength to Weight: Bending, points 23
21 to 26
Thermal Diffusivity, mm2/s 3.4
8.1
Thermal Shock Resistance, points 19
22 to 31

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.16 to 0.25
Chromium (Cr), % 20 to 22.5
12 to 14
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 37.1
83.2 to 87.8
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 2.5 to 3.5
0
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