# 1/8-Hard 201L Stainless Steel

1/8-hard AISI 201L is AISI 201L stainless steel in the 1/8-hard temper. The graph bars on the material properties cards below compare 1/8-hard AISI 201L 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

250

Elastic (Young's, Tensile) Modulus

200 *GPa* 29 *x 10 ^{6} psi*

Elongation at Break

39 *%*

Fatigue Strength

370 *MPa* 54 *x 10 ^{3} psi*

Poisson's Ratio

0.28

Shear Modulus

77 *GPa* 11 *x 10 ^{6} psi*

Shear Strength

550 *MPa* 80 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

810 *MPa* 120 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

430 *MPa* 63 *x 10 ^{3} 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* 2580 *°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

2.4 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

2.9 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

12 *% relative*

Density

7.7 *g/cm ^{3}* 480

*lb/ft*

^{3}Embodied Carbon

2.6 *kg CO _{2}/kg material*

Embodied Energy

38 *MJ/kg* 16 *x 10 ^{3} BTU/lb*

Embodied Water

140 *L/kg* 17 *gal/lb*

## Common Calculations

PREN (Pitting Resistance)

19

Resilience: Ultimate (Unit Rupture Work)

270 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

480 *kJ/m ^{3}*

Stiffness to Weight: Axial

14 *points*

Stiffness to Weight: Bending

25 *points*

Strength to Weight: Axial

29 *points*

Strength to Weight: Bending

25 *points*

Thermal Diffusivity

4.0 *mm ^{2}/s*

Thermal Shock Resistance

18 *points*

## Alloy Composition

Fe | 67.9 to 75 | |

Cr | 16 to 18 | |

Mn | 5.5 to 7.5 | |

Ni | 3.5 to 5.5 | |

Si | 0 to 0.75 | |

N | 0 to 0.25 | |

P | 0 to 0.045 | |

C | 0 to 0.030 | |

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

Welding Metallurgy of Stainless Steels, Erich Folkhard et al., 2012

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

Properties and Selection: Irons, Steels and High Performance Alloys, ASM Handbook vol. 1, ASM International, 1993

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

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