Hastelloy® B-3

Hastelloy® B-3® is a nickel-molybdenum alloy with excellent resistance to hydrochloric acid at all concentrations and temperatures. It also withstands sulfuric, acetic, formic and phosphoric acids, and other nonoxidizing media. B-3 alloy has a special chemistry designed to achieve greater thermal stability than B-2 alloy, resulting in easier fabrication.

Because this alloy contains no significant chromium addition it should NOT be used in oxidizing media or in presence of oxidizing salts, such as ferric or cupric salts. The latter may form when iron or copper is present in a system containing hydrochloric acid. Likewise alloy B-3 does not withstand wet chlorine gas or hypochlorite bleach.

Chemistry

 NiCrMoMnCuSiCSPTiAlCoNbVFe
MIN 65.0 1.0 27.0 -- -- -- -- -- -- -- -- -- -- -- 1.0
MAX -- 3.0 32.0 1.0 0.2 0.1 0.01 0.01 0.03 0.2 0.5 3.0 0.2 0.2 3.0

Specifications

ASME SB 333ASME SB 335ASME SB 366
ASME SB 619ASME SB 619 Class I or II
ASME SB 622ASME SB 626
ASTM B 333ASTM B 335
ASTM B 366
ASTM B 472
ASTM B 619
ASTM B 619 Class I or III
ASTM B 626
UNS N10675

Inventory

Hastelloy® B-3 Weld Wire

Features

• Resists hydrochloric acid at all concentrations and temperatures
• Withstands wet HCl gas, sulfuric, acetic and phosphoric acids
• Excellent resistance to pitting and to stress corrosion cracking

Applications

• Acetic acid production, initial phase in presence of iodide catalyst
• Methyl methacrylate production with hot 98 % H2SO4
• Production of herbicides, insecticides, ethylene glycol, ethyl benzene

Physical Properties

Density: 0.333 lb/inch3
Melting Point: 2500-2585°F
Electrical Resistivity: 651 Ohm - circ mil/ft

Temperature,°F 200 400 600 800 1000 1200 1400 1600
Coefficient* of Thermal Expansion, in/in°F x 10-6 5.7 6.1 6.3 6.5 6.6 6.5 7.1 7.6
Modulus of Elasticity Dynamic, psi x 10-6 30.9 30.1 29.3 28.3 27.2 26.5 24.9 23.3

* 70°F to indicated temperature.

Mechanical Properties

Average Tensile Data, Sheet*

Temperature,°F 70 200 400 600 800 1000
Ultimate Tensile Strength, ksi 125.0 120.7 110.0 104.4 102.0 97.8
0.2% Yield Strength, ksi 60.6 55.3 47.0 43.5 42.4 39.0
Elongation, % 53.4 56.9 59.7 63.4 62.0 59.0

* Limited data for 0.125" bright annealed sheet