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EN 1.4951 Stainless Steel vs. EN 1.4369 Stainless Steel

Both EN 1.4951 stainless steel and EN 1.4369 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 81% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4951 stainless steel and the bottom bar is EN 1.4369 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
260
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 38
40
Fatigue Strength, MPa 190
330
Impact Strength: V-Notched Charpy, J 98
91
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
77
Shear Strength, MPa 430
580
Tensile Strength: Ultimate (UTS), MPa 630
850
Tensile Strength: Yield (Proof), MPa 220
390

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 450
420
Maximum Temperature: Mechanical, °C 1100
940
Melting Completion (Liquidus), °C 1410
1400
Melting Onset (Solidus), °C 1360
1360
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 25
14
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 4.3
3.0
Embodied Energy, MJ/kg 61
43
Embodied Water, L/kg 190
150

Common Calculations

PREN (Pitting Resistance) 26
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
280
Resilience: Unit (Modulus of Resilience), kJ/m3 130
380
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
31
Strength to Weight: Bending, points 21
26
Thermal Diffusivity, mm2/s 3.9
4.0
Thermal Shock Resistance, points 14
18

Alloy Composition

Carbon (C), % 0.040 to 0.080
0.070 to 0.15
Chromium (Cr), % 24 to 26
17.5 to 19.5
Iron (Fe), % 49.1 to 57
63 to 70.2
Manganese (Mn), % 0 to 2.0
5.0 to 7.5
Nickel (Ni), % 19 to 22
6.5 to 8.5
Nitrogen (N), % 0 to 0.1
0.2 to 0.3
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 0.7
0.5 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015