Tube stainless steel SAF® 3006

aeronautical

Overview
SAF® 3006 (UNS S83071) is a high‑alloy duplex (austenitic‑ferritic) stainless steel engineered for enhanced corrosion resistance in acidic and caustic environments. It is specifically specified for heat exchanger tubing in chemical and petrochemical applications, offering a cost‑effective alternative to austenitic stainless steels and nickel‑based alloys while enabling lighter construction due to higher mechanical strength.

Quick facts
Product form: Heat exchanger tubing
Standard sizes: OD 0.75 – 1" (19.05 – 25.4 mm); WT 0.049 – 0.083" (1.24 – 2.11 mm); other sizes available on request
Standard: ASTM A789/790
Common applications:

• Caustic evaporators
• Acid coolers
• Condensers

Chemical composition (nominal), %
C | Si | Mn | P | S | Cr | Ni | Mo | N
≤0.030 | 0.02 | 1.0 | ≤0.030 | ≤0.015 | 30 | 7 | 3.2 | 0.35

Performance & advantages
This super‑duplex grade provides high mechanical strength—allowing lighter constructions—and excellent resistance to acids and caustic media. Compared with super‑duplex SAF® 2507 (UNS S32750), SAF® 3006 shows equal or improved resistance to pitting and crevice corrosion in chloride‑bearing environments. Suitable for use with or without seawater cooling.

Technical characteristics

• Designation: SAF® 3006 (UNS S83071)
• Product form: Heat exchanger tubing
• Standard sizes: OD 0.75 – 1" (19.05 – 25.4 mm); WT 0.049 – 0.083" (1.24 – 2.11 mm); other sizes on request
• Applicable standard: ASTM A789/790
• Chemical composition (nominal): C ≤0.030%; Si 0.02%; Mn 1.0%; P ≤0.030%; S ≤0.015%; Cr 30%; Ni 7%; Mo 3.2%; N 0.35%
• Typical applications: Caustic evaporators, acid coolers, condensers
• Key benefits: High corrosion resistance in acid/caustic environments; high mechanical strength enabling lighter construction; cost‑effective alternative to austenitic stainless steels and nickel alloys; suitable with or without seawater cooling