Super Alloy Ametek 899L (UNS N02200)

Topics Covered

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

Introduction

Super alloys were designed with the primary aim of providing high performance at elevated temperatures. According to the Haynes International Annual Report 2007, approximately 38.5 billion pounds per annum of supper alloys are produced.

Super alloy Ametek 899L is a commercially pure (99%) wrought nickel alloy. Although pure, this alloy does contain small quantities of other elements totaling less than 1%.

The following sections will discuss in detail about super alloy Ametek 899L.

Chemical Composition

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

Element Content (%)
Iron, Fe 0.4 max
Manganese, Mn 0.35 max
Silicon, Si 0.35 max
Copper, Cu 0.25 max
Carbon, C 0.15 max
Sulfur, S 0.01 max
Nickel, Ni Remainder

Physical Properties

The physical properties of Ametek 899L are tabulated below.

Properties Metric Imperial
Density 8.88 g/cm3 0.321 lb/in3
Melting point 1453 °C 2647 °F

Mechanical Properties

The following table shows mechanical properties of Ametek 899L (annealed high purity nickel strip).

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

Thermal Properties

The thermal properties of Ametek 899L (annealed high purity nickel strip).

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

Other Designations

Equivalent materials to Ametek 899L are listed below:

  • ASTM B160
  • ASTM B161
  • ASTM B162
  • ASTM B163
  • ASTM B366
  • ASTM B725
  • ASTM B730
  • DIN 2.4060
  • DIN 2.4066

Fabrication and Heat Treatment

Machinability

Ametek 899L can be machined using standard tooling. Commercially pure nickel is soft and gummy to machine. High-speed-steel tools are recommended rather than carbide tooling. Care should be taken to maintain a high positive rake angle on cutting tools.

Forming

Ametek 899L can be formed using all the traditional methods applied for plain carbon steel; however more power is required for forming nickel.

Forging

Forging can be performed at 1232-926°C (2250-1700°F).

Welding

Welding of Ametek 899L can be performed using all the traditional welding methods especially shielded metal-arc, gas tungsten-arc and gas metal-arc welding methods. Nickel filler wire or electrodes should be used.

Annealing

Annealing can be ideally performed at 815°C (1500°F). However it can also be done within 926 and 704°C (1700 and 1300°F) based on the degree of cold working and time at temperature.

Hot Working

Hot working can be performed by heating the alloy to 1204-649°C (2200-1200°F).

Cold Working

Ametek 899L can be cold worked using traditional tooling.

Applications

Ametek 899L is used in the following areas:

  • Rechargeable batteries
  • Electronic parts
  • Resistance to corrosion applications such as foods and handling alkaline solutions.

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