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EN 1.4655 Stainless Steel vs. EN 1.4958 Stainless Steel

Both EN 1.4655 stainless steel and EN 1.4958 stainless steel are iron alloys. They have 72% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4655 stainless steel and the bottom bar is EN 1.4958 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23 to 25
40
Fatigue Strength, MPa 320
170
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 460
430
Tensile Strength: Ultimate (UTS), MPa 720 to 730
630
Tensile Strength: Yield (Proof), MPa 450 to 480
190

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 440
500
Maximum Temperature: Mechanical, °C 1050
1090
Melting Completion (Liquidus), °C 1420
1400
Melting Onset (Solidus), °C 1370
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 13
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 15
30
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 2.9
5.3
Embodied Energy, MJ/kg 41
75
Embodied Water, L/kg 160
200

Common Calculations

PREN (Pitting Resistance) 26
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 160
190
Resilience: Unit (Modulus of Resilience), kJ/m3 510 to 580
95
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 26
22
Strength to Weight: Bending, points 23
20
Thermal Diffusivity, mm2/s 4.0
3.2
Thermal Shock Resistance, points 20
15

Alloy Composition

Aluminum (Al), % 0
0.2 to 0.5
Carbon (C), % 0 to 0.030
0.030 to 0.080
Chromium (Cr), % 22 to 24
19 to 22
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 1.0 to 3.0
0 to 0.5
Iron (Fe), % 63.6 to 73.4
41.1 to 50.6
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 0.1 to 0.6
0
Nickel (Ni), % 3.5 to 5.5
30 to 32.5
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0.050 to 0.2
0 to 0.030
Phosphorus (P), % 0 to 0.035
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.7
Sulfur (S), % 0 to 0.015
0 to 0.010
Titanium (Ti), % 0
0.2 to 0.5