Alloy Wire International
Datasheet: Hastelloy˘ C-4
Hastelloy˘ C-4
This Nickel-Chromium-Molybdenum alloy tolerates high temperatures and gives a design freedom in areas where weld geometry makes excessive heat build-up unavoidable. Resistance to general and localised corrosion and stress corrosion cracking is generally similar to Hastelloy C-276. With its high contents of Chromium and Molybdenum, Hastelloy C-4 is able to withstand both oxidizing and non-oxidizing acids, and is resistant to pitting and crevice attacks in the presence of chlorides and other halides. Like other nickel alloys, Hastelloy C-4 is ductile, easy to form and weld.
Hastelloy C-4 is also known as Nicrofer 6616.
Available in all profile options
Key Features
Hastelloy C-4 offers the following key features:
Excellent resistance to stress-corrosion cracking and to oxidizing atmospheres at high temperature.
Exceptional resistance to a wide variety of chemical process environments including, hot contaminated mineral acids, solvents, chlorine, formic and acetic acids, and salt waters.
Typical Applications
Hastelloy C-4 is known to be suitable for the following applications:
Designations
W.NR 2.4610
UNS N06455
AWS 052
Specifications
ASTM B574
ASTM B619
Chemical Composition
The chemical composition of Hastelloy C-4 is indicated in the table below:
| Element | Min % | Max % |
|---|---|---|
| Cr | 14.00 | 18.00 |
| Mo | 14.00 | 17.00 |
| Fe | – | 3.00 |
| C | – | 0.015 |
| Si | – | 0.08 |
| Co | – | 2.00 |
| Mn | – | 1.00 |
| P | – | 0.04 |
| S | – | 0.03 |
| Ti | – | 0.70 |
| Ni | Bal |
Alloy Details
Hastelloy C-4 density, melting point, coefficient of expansion, and modulus of elasticity is indicated in the table below:
| Density | Melting Point | Coefficient of Expansion | Modulus of Rigidity | Modulus of Elasticity |
|---|---|---|---|---|
| 8.64 g/cm³ | 1399 °C | 10.8 μm/m °C (20 – 100 °C) | 81.2 kN/mm² | 212.4 kN/mm² |
| 0.312 lb/in³ | 2550 °F | 6.0 x 10-6 in/in °F (70 – 212 °F) | 11777 ksi | 30807 ksi |
Heat treatment of finished parts
The typical heat treatment of Hastelloy C-4:
| Condition as supplied by AWI | Type | Temperature | Time | Cooling |
|---|---|---|---|---|
| Annealed or Spring Temper | Stress Relieve | 400 – 450 °C (750 – 840 °F) | 2 Hr | Air |
Properties
The typical mechanical properties of Hastelloy C-4:
| Annealed | ||
|---|---|---|
| Approx. tensile strength | <1100 N/mm² | <159 ksi |
| Approx. operating temperature depending on load** and environment | -200 to +400 °C | -330 to +750 °F |
| Spring Temper | ||
|---|---|---|
| Approx. tensile strength | 1300 – 1700 N/mm² | 189 – 247 ksi |
| Approx. operating temperature depending on load** and environment | -200 to +400 °C | -330 to +750 °F |
The above tensile strength ranges are typical. If you require different please ask.
*Trade name of Haynes International
