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EN 1.4621 Stainless Steel vs. EN 1.4618 Stainless Steel

Both EN 1.4621 stainless steel and EN 1.4618 stainless steel are iron alloys. They have 87% of their average alloy composition in common. There are 32 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 EN 1.4618 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 25
51
Fatigue Strength, MPa 190
240 to 250
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 320
480 to 500
Tensile Strength: Ultimate (UTS), MPa 500
680 to 700
Tensile Strength: Yield (Proof), MPa 270
250 to 260

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 510
410
Maximum Temperature: Mechanical, °C 970
900
Melting Completion (Liquidus), °C 1440
1400
Melting Onset (Solidus), °C 1390
1360
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 21
15
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 14
13
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.8
2.7
Embodied Energy, MJ/kg 41
39
Embodied Water, L/kg 140
150

Common Calculations

PREN (Pitting Resistance) 21
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
270 to 280
Resilience: Unit (Modulus of Resilience), kJ/m3 190
160 to 170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
24 to 25
Strength to Weight: Bending, points 18
22 to 23
Thermal Diffusivity, mm2/s 5.7
4.0
Thermal Shock Resistance, points 17
15 to 16

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 20 to 21.5
16.5 to 18.5
Copper (Cu), % 0.1 to 1.0
1.0 to 2.5
Iron (Fe), % 74.4 to 79.7
62.7 to 72.5
Manganese (Mn), % 0 to 1.0
5.5 to 9.5
Nickel (Ni), % 0
4.5 to 5.5
Niobium (Nb), % 0.2 to 1.0
0
Nitrogen (N), % 0 to 0.030
0 to 0.15
Phosphorus (P), % 0 to 0.040
0 to 0.070
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.010

Comparable Variants