Hastelloy C4
Description:
Hastelloy C-4 is a Nickel-Chromium-Molybdenum alloy that offers exceptional stabilization at the elevated temperatures, good ductility and resistance to corrosion properties. It retains its characteristics even after aging up to 1200oF to 1900oF or 649oC to 1038oC. Alloy C-4 offers resistance to grain development precipitation in the welding area so it is highly suitable for the chemical processes in the welding condition. It offers extremely high resistance to stress corrosion cracking and oxidizing conditions up to 1900oF or 1038oC.
Hastelloy C-4 offers resistance to mineral acids, organic and inorganic acids, sea water and brine solutions. It has service temperature up to 1900oF or 1038oC. Outstanding resistance to high temperature corrosion and stress corrosion cracking. Great material for use in chemical processing plants and nuclear fuel processing.
Other Designations:
Other designations that are equivalent to Hastelloy(r) C-4 include:
· ASTM B574
· ASTM B575
· ASTM B619
· ASTM B622
· ASTM B626
· DIN 2.4610
Chemical Composition:
The chemical composition of Hastelloy C-4 is outlined in the following table.
|
Element |
Content (%) |
|
Chromium, Cr |
14-18 |
|
Molybdenum, Mo |
14-17 |
|
Iron, Fe |
3 max |
|
Cobalt, Co |
2 max |
|
Manganese, Mn |
1 max |
|
Titanium, Ti |
0.7 max |
|
Silicon, Si |
0.08 max |
|
Phosphorus, P |
0.04 max |
|
Sulfur, S |
0.03 max |
|
Carbon, C |
0.015 max |
|
Nickel, Ni |
Remainder |
Mechanical Properties:
The mechanical properties of Hastelloy C-4 are outlined in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
738 MPa |
107000 psi |
|
Yield strength ( @ 0.2% offset) |
492 MPa |
71400 psi |
|
Elastic modulus |
211 GPa |
30600 ksi |
|
Elongation at break (in 50.8 mm) |
42% |
42% |
Machinability:
Hastelloy C-4 can be machined using conventional methods.
Forming:
Hastelloy C-4 can be easily formed using conventional techniques.
Welding:
Except submerged arc and oxy-acetylene welding methods, Hastelloy (r ) C-4 can be welded using all other welding methods.
Heat Treatment:
Hastelloy C-4 is heat treated by annealing at 1066°C (1950°F) followed by quenching.
Forging:
Hastelloy C-4 is hot forged at 955 to 1177°C (1750 to 2150°F).
Hot Working:
Hastelloy C-4 is hot extruded or hot worked similar to that of stainless steels.
Cold Working:
Hastelloy C-4 can be cold worked using conventional methods.
Annealing:
Hastelloy C-4 is annealed at 1066°C (1950°F) followed by quenching.
Aging:
Hastelloy C-4 is aged at 649°C (1200°F) for 10 h in order to improve its yield strength and ductility without decreasing its ultimate tensile strength.
Hardening:
Hastelloy C-4 is hardened by cold working.
Applications:
Chemical processing equipment
Nuclear fuel processing