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EN 1.4021 Stainless Steel vs. EN 1.4458 Stainless Steel

Both EN 1.4021 stainless steel and EN 1.4458 stainless steel are iron alloys. They have 61% of their average alloy composition in common. There are 31 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 1.4021 stainless steel and the bottom bar is EN 1.4458 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 17
34
Fatigue Strength, MPa 240 to 380
150
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 630 to 880
510
Tensile Strength: Yield (Proof), MPa 390 to 670
190

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Maximum Temperature: Corrosion, °C 390
430
Maximum Temperature: Mechanical, °C 760
1100
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1400
1370
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 30
16
Thermal Expansion, µm/m-K 11
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
30
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 1.9
5.4
Embodied Energy, MJ/kg 27
75
Embodied Water, L/kg 100
200

Common Calculations

PREN (Pitting Resistance) 13
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 110
140
Resilience: Unit (Modulus of Resilience), kJ/m3 400 to 1160
89
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 23 to 31
17
Strength to Weight: Bending, points 21 to 26
18
Thermal Diffusivity, mm2/s 8.1
4.2
Thermal Shock Resistance, points 22 to 31
12

Alloy Composition

Carbon (C), % 0.16 to 0.25
0 to 0.030
Chromium (Cr), % 12 to 14
19 to 22
Copper (Cu), % 0
0 to 2.0
Iron (Fe), % 83.2 to 87.8
40.2 to 53
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 2.5
Nickel (Ni), % 0
26 to 30
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.025