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EN 1.4112 Stainless Steel vs. S21640 Stainless Steel

Both EN 1.4112 stainless steel and S21640 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 89% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4112 stainless steel and the bottom bar is S21640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
230
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 20
46
Fatigue Strength, MPa 280
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Shear Strength, MPa 470
520
Tensile Strength: Ultimate (UTS), MPa 750
740
Tensile Strength: Yield (Proof), MPa 430
350

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 400
490
Maximum Temperature: Mechanical, °C 910
940
Melting Completion (Liquidus), °C 1430
1430
Melting Onset (Solidus), °C 1390
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 10
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 10
17
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.6
3.6
Embodied Energy, MJ/kg 37
51
Embodied Water, L/kg 130
150

Common Calculations

PREN (Pitting Resistance) 22
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
280
Resilience: Unit (Modulus of Resilience), kJ/m3 480
300
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
27
Strength to Weight: Bending, points 24
23
Thermal Diffusivity, mm2/s 4.1
4.0
Thermal Shock Resistance, points 26
16

Alloy Composition

Carbon (C), % 0.85 to 1.0
0 to 0.080
Chromium (Cr), % 17 to 19
17.5 to 19.5
Iron (Fe), % 76.6 to 81.2
63 to 74.3
Manganese (Mn), % 0 to 1.0
3.5 to 6.5
Molybdenum (Mo), % 0.9 to 1.3
0.5 to 2.0
Nickel (Ni), % 0
4.0 to 6.5
Niobium (Nb), % 0
0.1 to 1.0
Nitrogen (N), % 0
0.080 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0.070 to 0.12
0