TSING SHAN STEEL INDUSTRIAL LIMITED
TSING SHAN STEEL INDUSTRIAL LIMITED
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Inconel 718 is a Gamma Prime strengthened alloy with excellent mechanical properties at elevated temperatures, as well as cryogenic temperatures. Suitable for temperatures upto around 1300 F. Can be readily worked and age hardened.
Excellent strength from -423 degrees F to 1300 degrees F (-253 degrees C to 705 degrees C). Age hardenable and may be welded in fully aged condition, Excellent oxidation resistance up to 1800 degrees F (980 degrees C). Typically sold in the solution annealed temper, but can be ordered aged, cold worked, or cold worked & aged.
Uses for Inconel 718 tend to be in the field of gas turbine components and cryogenic storage tanks. Jet engines, pump bodies and parts, rocket motors and thrust reversers, nuclear fuel element spacers, hot extrusion tooling. Other popular uses are high strength bolting, and down hole shafting.
Chemical Requirements | |||||||
|---|---|---|---|---|---|---|---|
|
| Ni | Fe | Mo | Mn | Si | Cr | C |
| Max | 55.0 | Bal | 3.30 | 0.35 | 0.35 | 21.0 | 0.08 |
| Min | 50.0 |
| 2.80 |
|
| 17.0 |
|
Mechanical Property Requirements | |||||
|---|---|---|---|---|---|
|
| Ultimate Tensile | Yield Strength (0.2% OS) | Elong. in 2 in. (50mm) or 4D min, % | R/A | Hardness Brinell |
| Min | 185 KSi | 150 KSi | 12 | 15 | 331 |
| Max | |||||
| Min | 1275 MPa | 1034 MPa | |||
| Max | |||||
| Form | Standard |
|---|---|
| Metal Type | UNS N07718 |
| Bar | ASTM B637 AMS 5662 AMS 5663 AMS 5664 PWA 1009 PWA 1010 GE B50TF15 |
| Wire | AMS 5832 |
| Sheet | ASTM B670 AMS 5596 AMS 5597 PWA 1033 GE B50TF14 ASTM B670 ASTM B637 |
| Plate | ASTM B670 AMS 5596 AMS 5597 PWA 1033 GE B50TF15 ASTM B670 ASTM B637 |
| Tube | AMS 5589 AMS 5590 |
| Pipe | AMS 5589 AMS 5590 |
| Fitting |
|
| Forging | ASTM B637 AMS 5562 AMS 5663 AMS 5664 PWA 1009 PWA 1010 GE B50TF15 |
| Weld Wire | A5.14 ERNiFeCr-2 |
| Weld Electrode | |
| Din | 2.4668 |
Nickel & cobalt base corrosion, temperature and wear-resistant alloys, such as Inconel 718, are classified as moderate to difficult when machining, however, it should be emphasized that these alloys can be machined using conventional production methods at satisfactory rates. During machining these alloys work harden rapidly, generate high heat during cutting, weld to the cutting tool surface and offer high resistance to metal removal because of their high shear strengths. The following are key points which should be considered during machining operations:
CAPACITY - Machine should be rigid and overpowered as much as possible.
RIGIDITY - Work piece and tool should be held rigid. Minimize tool overhang.
TOOL SHARPNESS - Make sure tools are sharp at all times. Change to sharpened tools at regular intervals rather than out of necessity. A 0.015 inch wear land is considered a dull tool.
TOOLS - Use positive rake angle tools for most machining operations. Negative rake angle tools can be considered for intermittent cuts and heavy stock removal. Carbide-tipped tools are suggested for most applications. High speed tools can be used, with lower production rates, and are often recommended for intermittent cuts.
POSITIVE CUTS - Use heavy, constant, feeds to maintain positive cutting action. If feed slows and the tool dwells in the cut, work hardening occurs, tool life deteriorates and close tolerances are impossible.
LUBRICATION - lubricants are desirable, soluble oils are recommended especially when using carbide tooling. Detailed machining parameters are presented Tables 16 and17. General plasma cutting recommendations are presented in Table 18.
