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EN 1.4594 Stainless Steel vs. S81921 Stainless Steel

Both EN 1.4594 stainless steel and S81921 stainless steel are iron alloys. They have a moderately high 91% 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 1.4594 stainless steel and the bottom bar is S81921 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11 to 17
29
Fatigue Strength, MPa 490 to 620
370
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
79
Shear Strength, MPa 620 to 700
460
Tensile Strength: Ultimate (UTS), MPa 1020 to 1170
710
Tensile Strength: Yield (Proof), MPa 810 to 1140
500

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 450
430
Maximum Temperature: Mechanical, °C 820
990
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 11
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 15
14
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 3.2
2.9
Embodied Energy, MJ/kg 45
41
Embodied Water, L/kg 130
150

Common Calculations

PREN (Pitting Resistance) 19
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 190
180
Resilience: Unit (Modulus of Resilience), kJ/m3 1660 to 3320
630
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 36 to 41
25
Strength to Weight: Bending, points 29 to 31
23
Thermal Diffusivity, mm2/s 4.4
4.0
Thermal Shock Resistance, points 34 to 39
20

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.030
Chromium (Cr), % 13 to 15
19 to 22
Copper (Cu), % 1.2 to 2.0
0
Iron (Fe), % 72.6 to 79.5
66.7 to 75.9
Manganese (Mn), % 0 to 1.0
2.0 to 4.0
Molybdenum (Mo), % 1.2 to 2.0
1.0 to 2.0
Nickel (Ni), % 5.0 to 6.0
2.0 to 4.0
Niobium (Nb), % 0.15 to 0.6
0
Nitrogen (N), % 0
0.14 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.7
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030