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EN 1.7003 Steel vs. AISI 321 Stainless Steel

Both EN 1.7003 steel and AISI 321 stainless steel are iron alloys. They have 71% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is EN 1.7003 steel and the bottom bar is AISI 321 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 200
170 to 210
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 520 to 1780
590 to 690

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 410
870
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 46
16
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.0
16
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
3.2
Embodied Energy, MJ/kg 19
45
Embodied Water, L/kg 48
140

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18 to 63
21 to 25
Strength to Weight: Bending, points 18 to 42
20 to 22
Thermal Diffusivity, mm2/s 12
4.1
Thermal Shock Resistance, points 15 to 53
13 to 15

Alloy Composition

Carbon (C), % 0.35 to 0.42
0 to 0.080
Chromium (Cr), % 0.4 to 0.6
17 to 19
Iron (Fe), % 97.7 to 98.8
65.3 to 74
Manganese (Mn), % 0.5 to 0.8
0 to 2.0
Nickel (Ni), % 0
9.0 to 12
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0 to 0.4
0 to 0.75
Sulfur (S), % 0 to 0.035
0 to 0.030
Titanium (Ti), % 0
0 to 0.7