Alloy 59: Complete Properties & Application Guide

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Overview

Alloy 59 (UNS N06059 / W.Nr. 2.4605) is a high-chromium, high-molybdenum nickel alloy with outstanding corrosion resistance in both oxidizing and reducing environments. Its optimized chemistry with minimal iron and carbon content provides superior performance compared to C-276 and C-22 in many aggressive media.

Chemical Composition

The chemical composition of Alloy 59 is carefully controlled to achieve its unique combination of properties and performance characteristics.

Element	Min %	Max %
Nickel (Ni)	Balance	Balance
Chromium (Cr)	22.0	24.0
Molybdenum (Mo)	15.0	16.5
Iron (Fe)	—	1.5
Carbon (C)	—	0.01
Cobalt (Co)	—	0.3
Manganese (Mn)	—	0.5
Silicon (Si)	—	0.10

Mechanical Properties at Room Temperature

The mechanical properties of Alloy 59 vary depending on product form and heat treatment condition. The data below represents typical values for solution-annealed material.

Property	Value
Tensile Strength	690 MPa
Yield Strength (0.2% offset)	310 MPa
Elongation in 2 inches	60%
Density	8.60 g/cm3
Melting Point	1360 °C
Max Service Temperature	1040 °C

Corrosion Resistance

Exceptional resistance to mineral acids including hydrochloric, sulfuric, and nitric acids. Superior resistance to localized corrosion (pitting and crevice) in chloride-containing environments. Excellent resistance to stress corrosion cracking. Low carbon content prevents sensitization during welding.

Applications

The unique combination of properties makes Alloy 59 suitable for a wide range of demanding applications:

• Chemical Processing: Reactors, heat exchangers, and columns handling aggressive media.
• Flue Gas Desulfurization: Scrubber internals and absorber vessels.
• Pharmaceutical: High-purity process equipment and piping systems.
• Waste Treatment: Incineration scrubbers and waste gas treatment equipment.
• Sour Gas: Components for oil and gas environments containing H2S and CO2.

Available Product Forms

Hangbo Alloy Group manufactures and supplies Alloy 59 in the following product forms, conforming to ASTM, AMS, and ASME specifications:

• Round Bars: Diameters from 6 mm to 300 mm, hot-finished or cold-drawn, solution annealed.
• Seamless Tubes & Pipes: Sizes from 6 mm OD to 219 mm OD, various wall thicknesses.
• Plates & Sheets: Thicknesses from 0.5 mm to 50 mm, hot-rolled or cold-rolled.
• Forgings: Custom flanges, rings, discs, and complex shapes per customer drawing.
• Welding Wire: Diameters 0.8 mm to 5.0 mm, precision-wound coils and spools.

Related Standards

Standard	Description
ASTM B575	Plate, Sheet, and Strip
ASTM B622	Seamless Pipe and Tube
ASTM B619	Welded Pipe
ASTM B574	Bar and Rod
ASTM B564	Forgings
VdTUV 515	German Approval

Contact Us for Alloy 59

Hangbo Alloy Group maintains extensive inventory of Alloy 59 in all standard product forms. We can provide mill test certificates, third-party inspection reports (SGS, TUV), and custom processing services.

For quotations, material certifications, or technical consultation, contact our sales team or call +86-136-1165-6360. We typically respond within 10 minutes.