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EN 1.4618 Stainless Steel vs. EN 1.4621 Stainless Steel

Both EN 1.4618 stainless steel and EN 1.4621 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 1.4618 stainless steel and the bottom bar is EN 1.4621 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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

Comparable Variants