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EN 1.4621 Stainless Steel vs. ASTM A372 Grade K Steel

Both EN 1.4621 stainless steel and ASTM A372 grade K steel are iron alloys. They have 79% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4621 stainless steel and the bottom bar is ASTM A372 grade K steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 25
23
Fatigue Strength, MPa 190
440
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 320
490
Tensile Strength: Ultimate (UTS), MPa 500
780
Tensile Strength: Yield (Proof), MPa 270
620

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 970
440
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 21
48
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 14
4.4
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.8
1.8
Embodied Energy, MJ/kg 41
24
Embodied Water, L/kg 140
57

Common Calculations

PREN (Pitting Resistance) 21
2.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
160
Resilience: Unit (Modulus of Resilience), kJ/m3 190
1010
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
27
Strength to Weight: Bending, points 18
24
Thermal Diffusivity, mm2/s 5.7
13
Thermal Shock Resistance, points 17
23

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.18
Chromium (Cr), % 20 to 21.5
1.0 to 1.8
Copper (Cu), % 0.1 to 1.0
0
Iron (Fe), % 74.4 to 79.7
93.4 to 96.6
Manganese (Mn), % 0 to 1.0
0.1 to 0.4
Molybdenum (Mo), % 0
0.2 to 0.6
Nickel (Ni), % 0
2.0 to 3.3
Niobium (Nb), % 0.2 to 1.0
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.010