UNS S30441 Stainless Steel
S30441 stainless steel is an austenitic stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. It has a moderately low tensile strength among the wrought austenitic stainless steels in the database.
The graph bars on the material properties cards below compare S30441 stainless steel 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
170
Elastic (Young's, Tensile) Modulus
200 GPa 28 x 106 psi
Elongation at Break
45 %
Fatigue Strength
210 MPa 31 x 103 psi
Poisson's Ratio
0.28
Rockwell B Hardness
81
Shear Modulus
76 GPa 11 x 106 psi
Shear Strength
400 MPa 59 x 103 psi
Tensile Strength: Ultimate (UTS)
580 MPa 84 x 103 psi
Tensile Strength: Yield (Proof)
230 MPa 34 x 103 psi
Thermal Properties
Latent Heat of Fusion
300 J/g
Maximum Temperature: Corrosion
460 °C 860 °F
Maximum Temperature: Mechanical
940 °C 1730 °F
Melting Completion (Liquidus)
1420 °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 8.6 BTU/h-ft-°F
Thermal Expansion
16 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
2.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.6 % IACS
Otherwise Unclassified Properties
Base Metal Price
18 % relative
Density
7.8 g/cm3 490 lb/ft3
Embodied Carbon
3.4 kg CO2/kg material
Embodied Energy
50 MJ/kg 21 x 103 BTU/lb
Embodied Water
150 L/kg 18 gal/lb
Common Calculations
PREN (Pitting Resistance)
20
Resilience: Ultimate (Unit Rupture Work)
210 MJ/m3
Resilience: Unit (Modulus of Resilience)
140 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
21 points
Strength to Weight: Bending
20 points
Thermal Diffusivity
4.0 mm2/s
Thermal Shock Resistance
13 points
Alloy Composition
Among wrought stainless steels, the composition of S30441 stainless steel is notable for including tungsten (W) and containing a comparatively high amount of silicon (Si). Tungsten interacts with other alloying elements to a greater extent than usual, which makes it hard to broadly characterize its effects. Silicon content is typically governed by metallurgical processing concerns, but it can also be added for the purpose of improving oxidation resistance.
| Fe | 62 to 71.7 | |
| Cr | 17.5 to 19.5 | |
| Ni | 8.0 to 10.5 | |
| Cu | 1.5 to 2.5 | |
| Si | 1.0 to 2.0 | |
| Mn | 0 to 2.0 | |
| W | 0.2 to 0.8 | |
| Nb | 0.1 to 0.5 | |
| N | 0 to 0.1 | |
| C | 0 to 0.080 | |
| P | 0 to 0.045 | |
| S | 0 to 0.030 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM A240: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
Welding Metallurgy and Weldability of Stainless Steels, John C. Lippold and Damian J. Kotecki, 2005
Corrosion of Austenitic Stainless Steels: Mechanism, Mitigation and Monitoring, H. S. Khatak and B. Raj (editors), 2002
Pressure Vessels: External Pressure Technology, 2nd ed., Carl T. F. Ross, 2011
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
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015