Nov 25 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Fabrication and Heat Treatment
Machinability
Forming
Welding
Forging
Cold Working
Annealing
Applications
Introduction
Super alloys or high performance alloys contain many elements in a variety of combinations to reach a desired result. These alloys are suitable for use in environments with high temperatures and severe mechanical stress, and also in cases where high surface stability is needed. Super alloys provide good creep and oxidation resistance.
Strengthening of super alloys is performed by work hardening, solid-solution hardening, and precipitation hardening methods.
HAYNES(r) 230 is a nickel-chromium and tungsten alloy belonging to the high temperature, oxidation resistant, and high strength alloy group. It can be used effectively at temperatures up to 1149°C (2100°F).
The following datasheet will provide more details about HAYNES(r) 230.
Chemical Composition
The following table shows the chemical composition of HAYNES(r) 230.
|
Element |
Content (%) |
|
Nickel, Ni |
56.16-65.7 |
|
Chromium, Cr |
20-24 |
|
Tungsten, W |
13-15 |
|
Molybdenum, Mo |
1-3 |
|
Manganese, Mn |
1 |
|
Silicon, Si |
0.25-0.75 |
|
Carbon, C |
0.050-0.090 |
Physical Properties
The physical properties of HAYNES(r) 230 are outlined in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
8.96 g/cm³ |
0.324 lb/in³ |
|
Melting point |
1343°C |
2450°F |
Mechanical Properties
The mechanical properties of HAYNES(r) 230 are provided below.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
485 MPa |
70300 psi |
|
Yield strength |
275 MPa |
39900 psi |
|
Elongation at break |
15.0 % |
15.0 % |
Other Designations
Equivalent materials to HAYNES(r) 230 are:
-
AMS 5878
-
AMS 5891
-
ASTM B435
-
ASTM B564
-
ASTM B572
-
ASTM B619
-
ASTM B622
-
ASTM B626
Fabrication and Heat Treatment
Machinability
Traditional machining methods used for iron-based alloys can be used for HAYNES(r) 230. 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
HAYNES(r) 230 can be formed using conventional methods as it has good ductility. Powerful equipment is required.
Welding
HAYNES(r) 230 is weldable using all the conventional methods. Some of the commonly used methods are metal-arc welding, gas-tungsten arc welding, shielded 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 free from oil, paint or crayon stains.
Forging
Forging of HAYNES(r) 230 should be performed in the range of 1177-927°C (2150-1700°F).
Cold Working
HAYNES(r) 230 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.
Annealing
Annealing of HAYNES(r) 230 is performed at 1218°C (2225°F) and then followed by fast cooling or water quenching.
Applications
HAYNES(r) 230 is used in gas turbine hot section components e.g. thermocouple protection tubes, combustion cans, heat exchangers and industrial furnace fittings and muffles.