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EN 1.4621 Stainless Steel vs. EN 1.4958 Stainless Steel

Both EN 1.4621 stainless steel and EN 1.4958 stainless steel are iron alloys. They have 68% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4621 stainless steel and the bottom bar is EN 1.4958 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 25
40
Fatigue Strength, MPa 190
170
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 320
430
Tensile Strength: Ultimate (UTS), MPa 500
630
Tensile Strength: Yield (Proof), MPa 270
190

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 510
500
Maximum Temperature: Mechanical, °C 970
1090
Melting Completion (Liquidus), °C 1440
1400
Melting Onset (Solidus), °C 1390
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 21
12
Thermal Expansion, µm/m-K 11
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 14
30
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 2.8
5.3
Embodied Energy, MJ/kg 41
75
Embodied Water, L/kg 140
200

Common Calculations

PREN (Pitting Resistance) 21
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
190
Resilience: Unit (Modulus of Resilience), kJ/m3 190
95
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
22
Strength to Weight: Bending, points 18
20
Thermal Diffusivity, mm2/s 5.7
3.2
Thermal Shock Resistance, points 17
15

Alloy Composition

Aluminum (Al), % 0
0.2 to 0.5
Carbon (C), % 0 to 0.030
0.030 to 0.080
Chromium (Cr), % 20 to 21.5
19 to 22
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0.1 to 1.0
0 to 0.5
Iron (Fe), % 74.4 to 79.7
41.1 to 50.6
Manganese (Mn), % 0 to 1.0
0 to 1.5
Nickel (Ni), % 0
30 to 32.5
Niobium (Nb), % 0.2 to 1.0
0 to 0.1
Nitrogen (N), % 0 to 0.030
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.7
Sulfur (S), % 0 to 0.015
0 to 0.010
Titanium (Ti), % 0
0.2 to 0.5