Super Alloy Ametek 899A™ (UNS N02270)

Topics Covered

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

Introduction

Super alloys comprise different kinds of elements in a variety of combinations to obtain the desired result. They have good creep and oxidation resistance. They can function at very high temperatures and severe mechanical stress, and also where high surface stability is required. There are three groups of alloys such as cobalt-based, nickel-based, and iron-based alloys. All of these can function at temperatures above 540°C (1000°F).

Ametek 899A™ is a nickel-based alloy. The following datasheet gives more details about Ametek 899A™.

Chemical Composition

The chemical composition of Ametek 899A™ is outlined in the following table.

Element Content (%)
Nickel, Ni ≥ 99.97
Carbon, C 0.0050-0.020
Iron, Fe ≤ 0.0050
Copper, Cu ≤ 0.0010
Sulfur, S ≤ 0.0010
Silicon, Si ≤ 0.0010
Manganese, Mn ≤ 0.0010

Physical Properties

The following table shows the physical properties of annealed Ametek 899A™.

Properties Metric Imperial
Density 8.90 g/cm³ 0.322 lb/in³
Melting point 1455°C 2650°F

Mechanical Properties

The mechanical properties of Ametek 899A™ are displayed in the following table.

Properties Metric Imperial
Tensile strength 345-400 MPa 50000-58000 psi
Yield strength (at strain 0.200%) 103-138 MPa 14900-20000 psi
Poisson’s ratio 0.31 0.31
Elongation at break (typical) 40-45% 40-45%
Hardness, Rockwell B ≤ 46 ≤ 46
Hardness, Vickers 64-90 64-90

Thermal Properties

The thermal properties of Ametek 899A™ are highlighted in the following table.

Properties Metric Imperial
Thermal conductivity (at 70°C/158°F) 86 W/mK 597 BTU in/hr.ft².°F

Other Designations

Other designations that are equivalent to Ametek 899A™ include:

  • ASTM F1
  • ASTM F3

Fabrication and Heat Treatment

Machinability

Ametek 899A™ can be machined using conventional methods.

Forming

Ametek 899A™ can be formed using conventional methods.

Welding

Ametek 899A™ is welded using conventional methods.

Heat Treatment

Ametek 899A™ is heat treated by annealing at 816°C (1500°F) followed by cooling.

Forging

Ametek 899A™ is forged at temperatures ranging from 705 to 1038°C (1300 to 1900°F).

Hot Working

Ametek 899A™ is hot worked at temperatures ranging from 705 to 983°C (1300 to 1800°F).

Cold Working

Ametek 899A™ can be easily cold worked using conventional techniques.

Annealing

Ametek 899A™ is annealed at 816°C (1500°F) followed by cooling.

Hardening

Ametek 899A™ is hardened by cold working.

Applications

Ametek 899A™ is used in the following applications:

  • Electronic cathodes or anodes
  • Resistance thermometers
  • Fluorescent light components

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