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EN 1.7701 Steel vs. AISI 321H Stainless Steel

Both EN 1.7701 steel and AISI 321H stainless steel are iron alloys. They have 72% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is EN 1.7701 steel and the bottom bar is AISI 321H stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 480
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 670 to 2010
580

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 420
940
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 44
15
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
16
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.9
3.2
Embodied Energy, MJ/kg 26
46
Embodied Water, L/kg 52
140

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24 to 71
21
Strength to Weight: Bending, points 22 to 45
20
Thermal Diffusivity, mm2/s 12
4.0
Thermal Shock Resistance, points 20 to 59
12

Alloy Composition

Carbon (C), % 0.48 to 0.56
0.040 to 0.1
Chromium (Cr), % 0.9 to 1.2
17 to 19
Iron (Fe), % 96.2 to 97.7
65.4 to 74
Manganese (Mn), % 0.7 to 1.1
0 to 2.0
Molybdenum (Mo), % 0.15 to 0.3
0
Nickel (Ni), % 0
9.0 to 12
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.4
0 to 0.75
Sulfur (S), % 0 to 0.025
0 to 0.030
Titanium (Ti), % 0
0 to 0.7
Vanadium (V), % 0.1 to 0.2
0