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EN 1.4971 Stainless Steel vs. AISI 439 Stainless Steel

Both EN 1.4971 stainless steel and AISI 439 stainless steel are iron alloys. They have 50% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (5, 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 439 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
160
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
23
Fatigue Strength, MPa 270
170
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
77
Shear Strength, MPa 530
310
Tensile Strength: Ultimate (UTS), MPa 800
490
Tensile Strength: Yield (Proof), MPa 340
250

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 570
530
Maximum Temperature: Mechanical, °C 1100
890
Melting Completion (Liquidus), °C 1460
1510
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
25
Thermal Expansion, µm/m-K 15
11

Otherwise Unclassified Properties

Base Metal Price, % relative 70
9.0
Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 7.6
2.3
Embodied Energy, MJ/kg 110
34
Embodied Water, L/kg 300
120

Common Calculations

PREN (Pitting Resistance) 38
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
95
Resilience: Unit (Modulus of Resilience), kJ/m3 280
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
18
Strength to Weight: Bending, points 23
18
Thermal Diffusivity, mm2/s 3.4
6.7
Thermal Shock Resistance, points 19
16

Alloy Composition

Aluminum (Al), % 0
0 to 0.15
Carbon (C), % 0.080 to 0.16
0 to 0.030
Chromium (Cr), % 20 to 22.5
17 to 19
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 37.1
77.1 to 82.8
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0 to 0.5
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0 to 0.030
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0
0.2 to 1.1
Tungsten (W), % 2.0 to 3.0
0