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Half-Hard 201 Stainless Steel

Half-hard AISI 201 is AISI 201 stainless steel in the half-hard temper. The graph bars on the material properties cards below compare half-hard AISI 201 to: wrought austenitic stainless steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Brinell Hardness

360

Elastic (Young's, Tensile) Modulus

200 GPa 29 x 106 psi

Elongation at Break

21 %

Fatigue Strength

550 MPa 80 x 103 psi

Poisson's Ratio

0.28

Shear Modulus

77 GPa 11 x 106 psi

Shear Strength

740 MPa 110 x 103 psi

Tensile Strength: Ultimate (UTS)

1180 MPa 170 x 103 psi

Tensile Strength: Yield (Proof)

850 MPa 120 x 103 psi

Thermal Properties

Latent Heat of Fusion

280 J/g

Maximum Temperature: Corrosion

410 °C 770 °F

Maximum Temperature: Mechanical

880 °C 1620 °F

Melting Completion (Liquidus)

1410 °C 2570 °F

Melting Onset (Solidus)

1370 °C 2500 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

15 W/m-K 8.7 BTU/h-ft-°F

Thermal Expansion

17 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

2.5 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.9 % IACS

Otherwise Unclassified Properties

Base Metal Price

12 % relative

Density

7.7 g/cm3 480 lb/ft3

Embodied Carbon

2.6 kg CO2/kg material

Embodied Energy

38 MJ/kg 16 x 103 BTU/lb

Embodied Water

140 L/kg 17 gal/lb

Common Calculations

PREN (Pitting Resistance)

19

Resilience: Ultimate (Unit Rupture Work)

220 MJ/m3

Resilience: Unit (Modulus of Resilience)

1840 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

43 points

Strength to Weight: Bending

32 points

Thermal Diffusivity

4.0 mm2/s

Thermal Shock Resistance

26 points

Alloy Composition

Iron (Fe)Fe 67.5 to 75
Chromium (Cr)Cr 16 to 18
Manganese (Mn)Mn 5.5 to 7.5
Nickel (Ni)Ni 3.5 to 5.5
Silicon (Si)Si 0 to 1.0
Nitrogen (N)N 0 to 0.25
Carbon (C)C 0 to 0.15
Phosphorus (P)P 0 to 0.060
Sulfur (S)S 0 to 0.030

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Further Reading

ASTM A666: Standard Specification for Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate, and Flat Bar

ASTM A240: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications

ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels

Corrosion of Austenitic Stainless Steels: Mechanism, Mitigation and Monitoring, H. S. Khatak and B. Raj (editors), 2002

Austenitic Stainless Steels: Microstructure and Mechanical Properties, P. Marshall, 1984

ASM Specialty Handbook: Stainless Steels, J. R. Davis (editor), 1994

Advances in Stainless Steels, Baldev Raj et al. (editors), 2010