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S21904 Stainless Steel vs. EN 1.4958 Stainless Steel

Both S21904 stainless steel and EN 1.4958 stainless steel are iron alloys. They have 74% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is S21904 stainless steel and the bottom bar is EN 1.4958 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17 to 51
40
Fatigue Strength, MPa 380 to 550
170
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 510 to 620
430
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
630
Tensile Strength: Yield (Proof), MPa 390 to 910
190

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 430
500
Maximum Temperature: Mechanical, °C 980
1090
Melting Completion (Liquidus), °C 1400
1400
Melting Onset (Solidus), °C 1350
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
12
Thermal Expansion, µm/m-K 17
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 15
30
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 3.0
5.3
Embodied Energy, MJ/kg 43
75
Embodied Water, L/kg 160
200

Common Calculations

PREN (Pitting Resistance) 25
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
190
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
95
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 36
22
Strength to Weight: Bending, points 23 to 29
20
Thermal Diffusivity, mm2/s 3.8
3.2
Thermal Shock Resistance, points 15 to 21
15

Alloy Composition

Aluminum (Al), % 0
0.2 to 0.5
Carbon (C), % 0 to 0.040
0.030 to 0.080
Chromium (Cr), % 19 to 21.5
19 to 22
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 59.5 to 67.4
41.1 to 50.6
Manganese (Mn), % 8.0 to 10
0 to 1.5
Nickel (Ni), % 5.5 to 7.5
30 to 32.5
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0.15 to 0.4
0 to 0.030
Phosphorus (P), % 0 to 0.045
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.7
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0.2 to 0.5