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EN 1.4021 Stainless Steel vs. S40930 Stainless Steel

Both EN 1.4021 stainless steel and S40930 stainless steel are iron alloys. They have a very high 98% 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 S40930 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 17
23
Fatigue Strength, MPa 240 to 380
130
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
75
Shear Strength, MPa 390 to 530
270
Tensile Strength: Ultimate (UTS), MPa 630 to 880
430
Tensile Strength: Yield (Proof), MPa 390 to 670
190

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Maximum Temperature: Corrosion, °C 390
460
Maximum Temperature: Mechanical, °C 760
710
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 30
25
Thermal Expansion, µm/m-K 11
10

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
8.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 1.9
2.3
Embodied Energy, MJ/kg 27
32
Embodied Water, L/kg 100
94

Common Calculations

PREN (Pitting Resistance) 13
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 110
80
Resilience: Unit (Modulus of Resilience), kJ/m3 400 to 1160
94
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23 to 31
16
Strength to Weight: Bending, points 21 to 26
16
Thermal Diffusivity, mm2/s 8.1
6.7
Thermal Shock Resistance, points 22 to 31
16

Alloy Composition

Carbon (C), % 0.16 to 0.25
0 to 0.030
Chromium (Cr), % 12 to 14
10.5 to 11.7
Iron (Fe), % 83.2 to 87.8
84.7 to 89.4
Manganese (Mn), % 0 to 1.5
0 to 1.0
Nickel (Ni), % 0
0 to 0.5
Niobium (Nb), % 0
0.080 to 0.75
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.020
Titanium (Ti), % 0
0.050 to 0.2