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EN 1.4658 Stainless Steel vs. S21640 Stainless Steel

Both EN 1.4658 stainless steel and S21640 stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4658 stainless steel and the bottom bar is S21640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
230
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 28
46
Fatigue Strength, MPa 530
320
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 81
78
Shear Strength, MPa 580
520
Tensile Strength: Ultimate (UTS), MPa 900
740
Tensile Strength: Yield (Proof), MPa 730
350

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 460
490
Maximum Temperature: Mechanical, °C 1100
940
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 13
17

Otherwise Unclassified Properties

Base Metal Price, % relative 25
17
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 4.5
3.6
Embodied Energy, MJ/kg 61
51
Embodied Water, L/kg 200
150

Common Calculations

PREN (Pitting Resistance) 49
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
280
Resilience: Unit (Modulus of Resilience), kJ/m3 1280
300
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32
27
Strength to Weight: Bending, points 26
23
Thermal Diffusivity, mm2/s 4.3
4.0
Thermal Shock Resistance, points 24
16

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 26 to 29
17.5 to 19.5
Cobalt (Co), % 0.5 to 2.0
0
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 50.9 to 63.7
63 to 74.3
Manganese (Mn), % 0 to 1.5
3.5 to 6.5
Molybdenum (Mo), % 4.0 to 5.0
0.5 to 2.0
Nickel (Ni), % 5.5 to 9.5
4.0 to 6.5
Niobium (Nb), % 0
0.1 to 1.0
Nitrogen (N), % 0.3 to 0.5
0.080 to 0.3
Phosphorus (P), % 0 to 0.035
0 to 0.060
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030