B366 HASTELLOY B3/UNS N10675 LAP JOINT STB END BW PIPE FITTING

Overview

Hastelloy B-3 is a nickel-molybdenum alloy with excellent resistance to pitting, corrosion, and stress-corrosion cracking plus, thermal stability superior to that of alloy B-2. In addition, this nickel steel alloy has great resistance to knife-line and heat–affected zone attack. Alloy B-3 also withstands sulfuric, acetic, formic and phosphoric acids, and other non-oxidizing media. Furthermore, this nickel alloy has excellent resistance to hydrochloric acid at all concentrations and temperatures. Hastelloy B-3's distinguishing feature is its ability to maintain excellent ductility during transient exposures to intermediate temperatures. Such exposures are routinely experienced during heat treatments associated with fabrication.

Specification

ASTM B622 Standard Specification for Seamless Nickel and Nickel-Cobalt Alloy Pipe and Tube.

Chemical Composition

Characteristics:

• 1. Maintains excellent ductility during transient exposures to intermediate temperatures.
• 2. Excellent resistance to pitting, corrosion and stress-corrosion cracking.
• 3. Excellent resistance to knife-line and heat-affected zone attack.
• 4. Excellent resistance to acetic, formic and phosphoric acids and other non-oxidizing media.
• 5. Resistance to hydrochloric acid at all concentrations and temperatures.
• 6. Thermal stability superior to HASTELLOY B-2.

Applications:

• 1. Chemical processes
• 2. Vacuum furnaces
• 3. Mechanical components in reducing environments