347 Stainless Steel Strip

Introduction to 347 Stainless Steel Strip Properties

347 stainless steel strip is a specialized niobium-stabilized chromium-nickel austenitic grade that offers corrosion resistance comparable to 304/304L. This premium stainless steel strip stands out for its exceptional performance in high-temperature applications ranging from 800-1500°F, where niobium stabilization prevents chromium carbide precipitation.

Advanced Performance Characteristics

Temperature Performance:

• Excellent oxidation resistance up to 1500°F
• Superior creep and stress rupture properties compared to 304/304L
• Outstanding low-temperature toughness
• Non-magnetic in annealed condition

Corrosion Resistance:

• Enhanced resistance compared to 321 grade in strongly oxidizing environments
• Excellent intergranular corrosion resistance
• Superior resistance to polythionic acid stress corrosion (crucial for oil refineries)
• Exceptional performance in aqueous environments

Welding Properties:

The 347 stainless steel strip offers:

• Excellent weldability with AWS ER347 bare wire
• Compatible with E347 covered electrodes
• Superior intergranular corrosion resistance in as-welded condition

Technical Standards and Specifications

International Standards:

• UNS: S34700, S34709
• W. NR.: 1.4550
• ASTM: A 240, A262 PRACTICE E
• ASME: SA 240
• AMS: 5512
• PWA: 300, F17 LCS
• MSRR: 5632

The versatility and high-temperature stability of 347 stainless steel strip make it the preferred choice for applications requiring excellent corrosion resistance and reliable performance in elevated temperature environments.