718 Cold Reduced Nickel Bar - AMS 5962
Alloy 718 cold reduced nickel bar is a precipitation hardening nickel-chromium alloy containing significant amounts of columbium, aluminum, molybdenum and titanium. The alloy is cold worked after solution annealing and is typically used for high strength fasteners requiring a room temperature minimum tensile strength of 220 ksi after precipitation hardening. It is typically used at temperatures up to 900° F. This grade has oxidation resistance up to 1800° F. Alloy 718 cold reduced nickel is multiple melted usually with either a vacuum induction melt (VIM) followed by a vacuum arc remelt (VAR), or a vacuum induction melt (VIM) followed by an electroslag remelt (ESR).
- Inventory & Specs
- Chemical Composition
- Physical Properties
- Mechanical Properties
- Datasheet
- Additional Info
Inventory Size Ranges for 718 CR
| Type | Thickness | AMS Standards | Get a Quote |
|---|---|---|---|
| Bar | 0.260" - 1.635" | AMS 5962, AMS 5662 (Chem only) | Get a Quote |
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Characteristics of Inconel 718 CR
718 CR is known for its high tensile and yield strength, especially after precipitation hardening. It achieves a minimum tensile strength of 220 ksi (1517 MPa) after precipitation hardening. This material shows excellent resistance to creep and stress rupture at high temperatures, typically up to 1300°F (704°C).
Working with Inconel 718 CR
Inconel 718 CR is challenging to machine due to its high strength and tendency to work harden. Careful selection of cutting tools, machining parameters, and potentially specialized techniques like dry machining are important considerations.
Other industry standards we comply with:
- PWA LCS
- GE Aircraft Engine (GT193)
- GE Aviation S-SPEC-35 AeDMS S-400
- RR SABRe Edition 2
- DFARS Compliant
Common Trade Names
- Nickel 718 Cold Reduced
- Alloy 718 Cold Reduced
- Inconel® 718 Cold Reduced
Industry Applications for 718 CR
- Gas turbine engine components
- Fasteners and structural supports
- Cryogenic storage tanks
Chemical Composition
| Element | Min | Max | |
|---|---|---|---|
| Ni | Nickel | 50.0 | 55.0 |
| Al | Aluminum | 0.20 | 0.80 |
| Si | Silicon | - | 0.35 |
| Cr | Chromium | 17.0 | 21.0 |
| Co | Cobalt | - | 1.00 |
| P | Phosphorus | - | 0.015 |
| Nb | Columbium | 4.75 | 5.50 |
| B | Boron | - | 0.006 |
| S | Sulfur | - | 0.15 |
| Mo | Molybdenum | 2.80 | 3.30 |
| C | Carbon | - | 0.08 |
| Cu | Copper | - | 0.30 |
| Ti | Titanium | 0.65 | 1.15 |
| Mn | Manganese | - | 0.35 |
| Fe | Iron | - | Balance |
Physical Properties
- Density: 0.297 lbs/in3 (8.22 g/cm3)
- Machinability Rating: 12% of B-1112
Typical stock removal rate: 20 surface feet/minute with high-speed tooks, 80 surface feet/minute with carbide.
Carbide tooling preferred for turning operations, but high-speed steel preferred for milling (to avoid tooth chipping). Use relatively heavy cuts and low speeds to minimize surface work hardening. Roughing cuts are usually made before hardening, finishing cuts after hardening. Allow a contraction due to hardening of about 0.001 inch per inch of the workpiece dimensions.
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 160 ksi min. |
| Yield Strength | 120 ksi min. |
| Elongation (4D) | 12% min. |
| Hardness | Rc32 min. |
| Reduction of Area | 18% min. |