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S21904 Stainless Steel vs. EN 1.7711 Steel

Both S21904 stainless steel and EN 1.7711 steel are iron alloys. They have 65% 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 1.7711 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
210 to 280
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17 to 51
16 to 22
Fatigue Strength, MPa 380 to 550
290 to 520
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 510 to 620
440 to 570
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
690 to 930
Tensile Strength: Yield (Proof), MPa 390 to 910
400 to 800

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 980
430
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1350
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
33
Thermal Expansion, µm/m-K 17
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 15
3.0
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.0
2.3
Embodied Energy, MJ/kg 43
32
Embodied Water, L/kg 160
54

Common Calculations

PREN (Pitting Resistance) 25
2.9
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
130 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
430 to 1690
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 36
24 to 33
Strength to Weight: Bending, points 23 to 29
22 to 27
Thermal Diffusivity, mm2/s 3.8
8.9
Thermal Shock Resistance, points 15 to 21
24 to 32

Alloy Composition

Aluminum (Al), % 0
0 to 0.015
Carbon (C), % 0 to 0.040
0.36 to 0.44
Chromium (Cr), % 19 to 21.5
0.9 to 1.2
Iron (Fe), % 59.5 to 67.4
96 to 97.5
Manganese (Mn), % 8.0 to 10
0.45 to 0.85
Molybdenum (Mo), % 0
0.5 to 0.65
Nickel (Ni), % 5.5 to 7.5
0
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0
0.25 to 0.35

Comparable Variants