Alloy Wire International
Datasheet: Inconel® 686
Inconel® 686
This Nickel-Chromium-Molybdenum-Tungsten alloy has exceptional resistance to sulfuric or hydrochloric acids, and to crevice or pitting corrosion in hot acid solutions which out performs Hastelloy C grades in mixed acids.
Available in all profile options
Key Features
This alloy ideal for marine service having excellent resistance to general, galvanic, and localized corrosion and hydrogen embrittlement in seawater. INCONEL® 686 also has a high operating of up to 1000°C which is ideal for applications such as bolts, nuts and studs in the fasteners industry.
Typical Applications
Inconel® 686 is known to be suitable for the following applications:
Chemical Processing
Petrochemical processing
Marine Engineering
Acid Processing
Oil & Gas extraction
Pulp & Paper production
Pollution control
Waste treatment
Welding
Designations
UNS N06686
W.Nr. 2.4606
Ni-Cr-Mo-W
NiCr21Mo16W
Specifications
ASTM B574
ASTM B575
ASTM B619
ISO 15156-3 (NACE MR0175)
Chemical Composition
The chemical composition of Inconel® 686 is indicated in the table below:
| Element | Min % | Max % |
|---|---|---|
| Ni | Balance | Balance |
| Cr | 19.0 | 23.00 |
| Mo | 15.0 | 17.0 |
| W | 3.0 | 4.4 |
| Ti | 0.02 | 0.25 |
| Fe | – | 1.0 |
| C | – | 0.01 |
| Mn | – | 0.75 |
| S | – | 0.02 |
| Si | – | 0.08 |
| P | – | 0.04 |
Alloy Details
Inconel® 686 density, melting point, coefficient of expansion, modulus of rigidity, and elasticity is indicated in the table below:
| Density | Melting Point | Coefficient of Expansion | Modulus of Elasticity |
|---|---|---|---|
| 8.73 g/cm3 | 1338 – 1380 °C | 11.97 gm/m °C (20 – 100 °C) | 207.0 kN/mm2 |
| 0.315 lb/in3 | 2440 – 2516 °F | 6.650 x 10-6 in/in °F (70 – 212 °F) | 30000 ksi |
Properties
The typical mechanical properties of Inconel® 686:
| Annealed | ||
|---|---|---|
| Approx. tensile strength | <1000 N/mm² | <145i ksi |
| Approx. operating temperature depending on load** and environment | Up to 1000°C | Up to 1832°F |
| Spring Temper | ||
|---|---|---|
| Approx. tensile strength | 1200 – 1600 N/mm² | 174 – 232 ksi |
| Approx. operating temperature depending on load** and environment | Up to 1000°C | Up to 1832°F |
The above tensile strength ranges are typical. If you require different please ask.
*Trade name of Special Metals Group of Companies
** High temperature static applications
