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AISI 321 Stainless Steel vs. EN 1.7378 Steel

Both AISI 321 stainless steel and EN 1.7378 steel are iron alloys. They have 73% 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 AISI 321 stainless steel and the bottom bar is EN 1.7378 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34 to 50
17
Fatigue Strength, MPa 220 to 270
330
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
74
Shear Strength, MPa 420 to 460
430
Tensile Strength: Ultimate (UTS), MPa 590 to 690
700
Tensile Strength: Yield (Proof), MPa 220 to 350
490

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Maximum Temperature: Mechanical, °C 870
460
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1400
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
39
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 16
4.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.2
2.3
Embodied Energy, MJ/kg 45
33
Embodied Water, L/kg 140
61

Common Calculations

PREN (Pitting Resistance) 19
5.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 230
110
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 310
630
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 25
25
Strength to Weight: Bending, points 20 to 22
22
Thermal Diffusivity, mm2/s 4.1
10
Thermal Shock Resistance, points 13 to 15
20

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Boron (B), % 0
0.0015 to 0.0070
Carbon (C), % 0 to 0.080
0.050 to 0.1
Chromium (Cr), % 17 to 19
2.2 to 2.6
Iron (Fe), % 65.3 to 74
94.6 to 96.1
Manganese (Mn), % 0 to 2.0
0.3 to 0.7
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 9.0 to 12
0
Nitrogen (N), % 0 to 0.1
0 to 0.010
Phosphorus (P), % 0 to 0.045
0 to 0.020
Silicon (Si), % 0 to 0.75
0.15 to 0.45
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0 to 0.7
0.050 to 0.1
Vanadium (V), % 0
0.2 to 0.3