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EN 1.4021 Stainless Steel vs. EN 1.4618 Stainless Steel

Both EN 1.4021 stainless steel and EN 1.4618 stainless steel are iron alloys. They have 82% 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 1.4021 stainless steel and the bottom bar is EN 1.4618 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 17
51
Fatigue Strength, MPa 240 to 380
240 to 250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Shear Strength, MPa 390 to 530
480 to 500
Tensile Strength: Ultimate (UTS), MPa 630 to 880
680 to 700
Tensile Strength: Yield (Proof), MPa 390 to 670
250 to 260

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Corrosion, °C 390
410
Maximum Temperature: Mechanical, °C 760
900
Melting Completion (Liquidus), °C 1440
1400
Melting Onset (Solidus), °C 1400
1360
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 30
15
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
13
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 1.9
2.7
Embodied Energy, MJ/kg 27
39
Embodied Water, L/kg 100
150

Common Calculations

PREN (Pitting Resistance) 13
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 110
270 to 280
Resilience: Unit (Modulus of Resilience), kJ/m3 400 to 1160
160 to 170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23 to 31
24 to 25
Strength to Weight: Bending, points 21 to 26
22 to 23
Thermal Diffusivity, mm2/s 8.1
4.0
Thermal Shock Resistance, points 22 to 31
15 to 16

Alloy Composition

Carbon (C), % 0.16 to 0.25
0 to 0.1
Chromium (Cr), % 12 to 14
16.5 to 18.5
Copper (Cu), % 0
1.0 to 2.5
Iron (Fe), % 83.2 to 87.8
62.7 to 72.5
Manganese (Mn), % 0 to 1.5
5.5 to 9.5
Nickel (Ni), % 0
4.5 to 5.5
Nitrogen (N), % 0
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