Super Alloy AL 600™ (UNS N06600)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Other Designations
Fabrication and Heat Treatment
Machinability
Forming
Welding
Heat Treatment
Forging
Hot Working
Cold Working
Applications

Introduction

Super alloys are also called high performance alloys. They have the capacity to function under very high temperatures and extreme mechanical stress, and also where high surface stability is required. They have good creep and oxidation resistance.

Super alloys contain many elements in a variety of combinations so as to achieve the required result. Strengthening of super alloys is performed by solid-solution hardening, work hardening, and precipitation hardening methods.

There are three types of alloys, namely cobalt-base, nickel-base, and iron-base. All of these can be used at temperatures above 540°C (1000°F).

Super alloy AL 600™ is a general purpose structural engineering material that is ideal for use at elevated temperatures. The alloy has strength, corrosion resistance, stability, and durability, which are essential for such conditions.

The following datasheet will provide more details about super alloy AL 600™.

Chemical Composition

The following table shows the chemical composition of super alloy AL 600™.

Element Content (%)
Chromium, Cr 14-17
Iron, Fe 6-10
Manganese, Mn 1 max
Copper, Cu 0.5 max
Silicon, Si 0.5 max
Carbon, C 0.15 max
Sulfur, S 0.015 max
Nickel, Ni 72 max

Physical Properties

The physical properties of super alloy AL 600™ are outlined in the following table.

Properties Metric Imperial
Density 8.47 g/cm³ 0.306 lb/in³
Melting point 1399°C 2550°F

Other Designations

Equivalent materials to super alloy AL 600™ are provided in the table below.

AMS 5540 AMS 5580 AMS 5665 AMS 5687 ASTM B163
ASTM B166 ASTM B167 ASTM B168 ASTM B516 ASTM B517
ASTM B564 DIN 2.4816 MIL N-23228 MIL N-23229 MIL N-6710
MIL T-23227 QQ W390

Fabrication and Heat Treatment

Machinability

Traditional machining methods used for iron-based alloys can be used for super alloy AL 600™. During high-speed operations such as turning, grinding, or milling, it is recommended that water-based coolants are used. The use of heavy lubricants while drilling, tapping, broaching or boring is suitable. In cases where turning with a continuous cut is performed, carbide tools are suitable.

Forming

Super alloy AL 600™ can be formed using conventional methods as it has good ductility. Powerful equipment is required.

Welding

Super alloy AL 600™ is weldable using all the conventional methods. Some of the commonly used methods are gas-tungsten arc welding, shielded metal-arc welding, gas metal-arc welding and submerged-arc welding. It is recommended that matching alloy filler metal should be used. Before the welding process begins, the surface to be welded should be cleaned and should be free from oil, paint or crayon stains.

Heat Treatment

Super alloy AL 600™ can be solution annealed at 1010°C (1850°F) for 15 minutes and air cooled.

Forging

Forging of super alloy AL 600™ should be performed in the range of 1232-1038°C (2250-1900°F).

Hot Working

Super alloy AL 600™ can be hot worked in the range of 1232- 871°C (2250-1600°F). It has low ductility in the range of 649-871°C (1200-1600F), hence working in that temperature range should be avoided.

Cold Working

Super alloy AL 600™ can be cold worked using conventional tooling. To minimize galling and provide a neat finish, soft die materials containing bronze and zinc alloys are recommended. However, the life of the die is short.

Applications

Super alloy AL 600™ is used in the following:

  • Chemical process equipment
  • Heaters
  • Gas turbine components
  • Heat exchangers
  • Heat treatment furnace components and fittings.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Submit