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EN 1.4971 Stainless Steel vs. AISI 321 Stainless Steel

Both EN 1.4971 stainless steel and AISI 321 stainless steel are iron alloys. They have 61% of their average alloy composition in common. There are 31 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 1.4971 stainless steel and the bottom bar is AISI 321 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
170 to 210
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
34 to 50
Fatigue Strength, MPa 270
220 to 270
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
77
Shear Strength, MPa 530
420 to 460
Tensile Strength: Ultimate (UTS), MPa 800
590 to 690
Tensile Strength: Yield (Proof), MPa 340
220 to 350

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 570
480
Maximum Temperature: Mechanical, °C 1100
870
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
16
Thermal Expansion, µm/m-K 15
17

Otherwise Unclassified Properties

Base Metal Price, % relative 70
16
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 7.6
3.2
Embodied Energy, MJ/kg 110
45
Embodied Water, L/kg 300
140

Common Calculations

PREN (Pitting Resistance) 38
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
190 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 280
130 to 310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
21 to 25
Strength to Weight: Bending, points 23
20 to 22
Thermal Diffusivity, mm2/s 3.4
4.1
Thermal Shock Resistance, points 19
13 to 15

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.080
Chromium (Cr), % 20 to 22.5
17 to 19
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 37.1
65.3 to 74
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
9.0 to 12
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0 to 0.1
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0
0 to 0.7
Tungsten (W), % 2.0 to 3.0
0