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UNS S41041 Stainless Steel

S41041 stainless steel is a martensitic stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the heat treated (HT) condition. It has a moderately high tensile strength among the wrought martensitic stainless steels in the database.

The graph bars on the material properties cards below compare S41041 stainless steel to: wrought martensitic 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

240

Elastic (Young's, Tensile) Modulus

190 GPa 28 x 106 psi

Elongation at Break

17 %

Fatigue Strength

350 MPa 51 x 103 psi

Impact Strength: V-Notched Charpy

31 J 23 ft-lb

Poisson's Ratio

0.28

Reduction in Area

56 %

Shear Modulus

76 GPa 11 x 106 psi

Shear Strength

560 MPa 81 x 103 psi

Tensile Strength: Ultimate (UTS)

910 MPa 130 x 103 psi

Tensile Strength: Yield (Proof)

580 MPa 84 x 103 psi

Thermal Properties

Latent Heat of Fusion

270 J/g

Maximum Temperature: Corrosion

430 °C 800 °F

Maximum Temperature: Mechanical

740 °C 1360 °F

Melting Completion (Liquidus)

1450 °C 2640 °F

Melting Onset (Solidus)

1410 °C 2560 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

29 W/m-K 17 BTU/h-ft-°F

Thermal Expansion

10 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

2.9 % IACS

Electrical Conductivity: Equal Weight (Specific)

3.3 % IACS

Otherwise Unclassified Properties

Base Metal Price

8.5 % relative

Density

7.8 g/cm3 480 lb/ft3

Embodied Carbon

2.2 kg CO2/kg material

Embodied Energy

31 MJ/kg 13 x 103 BTU/lb

Embodied Water

100 L/kg 12 gal/lb

Common Calculations

PREN (Pitting Resistance)

13

Resilience: Ultimate (Unit Rupture Work)

140 MJ/m3

Resilience: Unit (Modulus of Resilience)

860 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

32 points

Strength to Weight: Bending

27 points

Thermal Diffusivity

7.8 mm2/s

Thermal Shock Resistance

33 points

Alloy Composition

Among wrought stainless steels, the composition of S41041 stainless steel is notable for including aluminum (Al) and niobium (Nb). Aluminum is used to improve oxidation resistance. It can also enhance the effects of heat treatment. Niobium is primarily used to improve yield strength, particularly at elevated temperatures.

Iron (Fe) 84.5 to 87.8
Chromium (Cr) 11.5 to 13
Manganese (Mn) 0.4 to 0.6
Niobium (Nb) 0.15 to 0.45
Silicon (Si) 0 to 0.5
Nickel (Ni) 0 to 0.5
Carbon (C) 0.13 to 0.18
Molybdenum (Mo) 0 to 0.2
Aluminum (Al) 0 to 0.050
Phosphorus (P) 0 to 0.030
Sulfur (S) 0 to 0.030

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

Followup Questions

Similar Alloys

Further Reading

ASTM A565: Standard Specification for Martensitic Stainless Steel Bars for High-Temperature Service

Welding Metallurgy and Weldability of Stainless Steels, John C. Lippold and Damian J. Kotecki, 2005

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

Corrosion of Stainless Steels, A. John Sedriks, 1996

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

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