1. Introduce
– Precipitation-hardenable nickel-based alloy with additions of Al, Cr, and Nb
– Low carbon version of Inconel 738
– Excellent oxidation resistance at temperatures above 704°C
– UNS R30783
* Inconel
- Features
– Resists oxidation and submersion in oxidizing and sulfurizing atmospheres above 900℃
– Non-corrosive to organic and salt solutions
– Excellent mechanical properties such as tensile and yield strength up to about 600℃ - Applications
– High temperature heat resistant equipment(Heat treatment furnace, boiler, jet engine parts, electric heater parts) - Types
– Incoenl 600/601, Inconel 625, Inconel 690, Inconel 718, Inconel 718+, Inconel X-750, etc.
* UNS
- Abbreviation for Unified Numbering Systems for Metals and Alloys
- Unified unique numbering system for metals and alloys
- A representative number that is compatible with metals and alloys defined in many material-related codes such as ASTM, AISI, ASME, AWS, etc.
* R : Reactive and Refractory Metals and Alloys
* UNS R30783 : 30XXX : Cobalt
2. Property
– Good strength, corrosion resistance, high temperature creep-rupture strength
| Element | Impact |
|---|---|
| Cr | Provides corrosion resistance, oxidation resistance |
| Co | Highly strengthening element, provides strength and creep properties |
| Mo | Highly strengthened element, high temperature oxidation resistance, cryogenic oxidation resistance, weldability |
| W | Highly strengthening element, provides high temperature creep properties |
[Inconel 738LC Chemical Composition (%)]
| Ni | Cr | Fe | C |
|---|---|---|---|
| 58.79 ~ 68.28 | 15.70 ~ 16.30 | Max. 0.05 | 0.09 ~ 0.13 |
| Al | Ti | Si | Mn |
|---|---|---|---|
| 3.20 ~ 3.70 | 3.20 ~ 3.70 | Max. 0.30 | Max. 0.02 |
| Mo | S | Co | Nb |
|---|---|---|---|
| 1.50 ~ 2.00 | Max. 0.02 | 3.00 ~ 9.00 | 0.60 ~ 1.10 |
| W | Ta | Zr | B |
|---|---|---|---|
| 2.40 ~ 2.80 | 1.50 ~ 2.00 | 0.03 ~ 0.08 | Max. 0.01 |
[Inconel 738LC Mechanical Properties]
| Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) |
|---|---|---|
| 1150 | 760 | 22 |
[Inconel 738LC Physical Properties]
| Density (g/㎤) | Melting Range (℃) |
|---|---|
| 8.27 | 1345 |
3. Standard & Specification
– Specification : UNS R30783
| ASTM | B637 |
| SAE | AMS 5596, AMS 5709 |
4. Available Form
– Bar, Rod
– Sheet, Strip, Plate
– Pipe, Tube
5. Application & Product
– Aerospace, Petrochemical
| Application | Product |
|---|---|
| Aerospace | rings, casings, combustors, turbine blades, high temperature fasteners in compressors, turbines and exhaust systems |
| Petrochemical | Reactors, heat exchangers, piping |
(1) High Temperature Fasteners / (2) Casings / (3) Reactors
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