ASTM A479 UNS S31254 Round Bars Overview
ASTM A479 UNS S31254 round bar also known as S31254, 1.4547 or 6% Molybdenum grade, offers high corrosion resistance, especially in aggressive chloride-containing environments. The high molybdenum content in SMO 254 material improves pitting and crevice corrosion resistance, stress corrosion cracking resistance, high temperature strength, and enhanced durability and toughness. Making UNS S31254 6MO an ideal material choice for chemical processing, oil and gas, and seawater applications.
Applications of ASTM A479 F44 Round Bars
Chemical processing equipment
Desalination equipment
Oil and gas industry equipment
Pulp and paper processing equipment
Marine equipment, such as seawater pumps and valves
Heat exchangers
Food processing equipment
AISI 254 SMO Round Bars Chemical Composition
| Grade | UNS | C≤ | Mn | P≤ | S≤ | Si≤ | Cr | Mo | Ni | Cu |
| 254SMO | S31254 | 0.02 | 1 | 0.03 | 0.01 | 0.8 | 19.5-20.5 | 6.0-6.5 | 17.5-18.5 | 0.5-1.0 |
Astm A479/ A276 Bars And Rods Mechanical Properties
| Mechanical properties | Tensile, min, ksi[MPa] | Yield, min, ksi[MPa] | Elongation, %(min) |
| S31254 | 95 [650] | 44 [300] | 35 |
UNS S31254 F44 SS Bars Size and Dimensions
- Diameter: 5-500mm
- Length: 0-1200mm, or as per client requirement
- Diameter tolertance: H7, H9, H10, H11
