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Half-hard AISI 201LN vs. Half-hard AISI 205

Both half-hard AISI 201LN and half-hard AISI 205 are iron alloys. Both are furnished in the half-hard temper. They have a moderately high 91% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is half-hard AISI 201LN and the bottom bar is half-hard AISI 205.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 320
350
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 25
20
Fatigue Strength, MPa 540
560
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 680
730
Tensile Strength: Ultimate (UTS), MPa 1060
1160
Tensile Strength: Yield (Proof), MPa 770
870

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 880
880
Melting Completion (Liquidus), °C 1410
1380
Melting Onset (Solidus), °C 1370
1340
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 17
18

Otherwise Unclassified Properties

Base Metal Price, % relative 12
11
Density, g/cm3 7.7
7.6
Embodied Carbon, kg CO2/kg material 2.6
2.6
Embodied Energy, MJ/kg 38
37
Embodied Water, L/kg 140
150

Common Calculations

PREN (Pitting Resistance) 20
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
210
Resilience: Unit (Modulus of Resilience), kJ/m3 1520
1900
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 38
42
Strength to Weight: Bending, points 30
32
Thermal Shock Resistance, points 23
24

Alloy Composition

Carbon (C), % 0 to 0.030
0.12 to 0.25
Chromium (Cr), % 16 to 17.5
16.5 to 18.5
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 67.9 to 73.5
62.6 to 68.1
Manganese (Mn), % 6.4 to 7.5
14 to 15.5
Nickel (Ni), % 4.0 to 5.0
1.0 to 1.7
Nitrogen (N), % 0.1 to 0.25
0.32 to 0.4
Phosphorus (P), % 0 to 0.045
0 to 0.060
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030