Hastelloy C-276 Forged Ring | High-Temperature Corrosion Resistant Alloy Forgings | ASTM B564 Standard
Hastelloy C-276 Forged Ring | High-Temperature Corrosion Resistant Alloy Forgings | ASTM B564 Standard
C-276 forged rings are high-performance nickel-chromium-molybdenum alloy forgings widely used in industrial equipment operating in extremely corrosive environments, such as petrochemical, marine engineering, and environmental desulfurization units. They are renowned for their excellent corrosion resistance, high-temperature strength, and resistance to stress corrosion cracking, making them particularly suitable for highly corrosive environments such as those containing chlorine, wet chlorine, and hypochlorites.
Technical Parameters:
Mechanical Properties:
Tensile Strength ≥690 MPa
Yield Strength ≥275 MPa
Elongation ≥40%
Density approx. 8.9 g/cm³
Melting Point Range: 1325–1370°C
Heat treatment state: Generally, it is solution treated to ensure optimal corrosion resistance and processing performance.
Application Scenarios
C-276 forged rings are commonly used in the manufacture of critical connection components for high-pressure, highly corrosive environments, such as:
- Flanges and valves in petroleum refining plants
- End caps and sealing rings in chemical reactors
- Pressure vessel interfaces in seawater desalination systems
- Pipeline connections in flue gas desulfurization (FGD) equipment
Mean Coefficient of Thermal Expansion:
| Temperature Range | |||
| °F | °C | in/in °F | cm/cm °C |
| 200 | 93 | 6.8 x 10-6 | 12.24 x 10-6 |
| 400 | 204 | 7.0 x 10-6 | 12.60 x 10-6 |
| 600 | 316 | 7.2 x 10-6 | 12.96 x 10-6 |
| 800 | 427 | 7.4 x 10-6 | 13.32 x 10-6 |
Recommended Tool Types & Machining Conditions:
| Operations | Carbide Tools |
| Roughing, with severeinterruption | Turning or Facing C-2 andC-3 grade: Negative rakesquare insert, 45° SCEA1,1/32 in. nose radius. Tooholder: 5° neg. back rake5° neg. side rake. Speed:30-50 sfm,0.004-0.008 in.feed, 0.150 in depth of cut.Dry2, oil3, or water-base coolant 4. |
| Normal roughing | Turning or Facing C-2 orC-3 grade: Negative ratesquare insert, 45° SCEA,1/32 in nose radius. Tooholder: 5° neg. back rake5° neg. side rake. Speed:90 sfm depending on rigidity of set up, 0.010 infeed, 0.150 in. depth ofcut. Dry, oil, or water-base coolant. |
| Finishing | Turning or Facing C-2 0rC-3 grade: Positive rakesquare insert, if possible45° SCEA, 1/32 in.noseradius. Tool holder: 5° pos.back rake, 5° pos. siderake.Speed: 95-110 sfm0.005-0.007 in. feed,0.040 in. depth of cut. Dryor water-base coolant. |
| Rough Boring | C-2 or C-3 grade: lf inserttype boring bar, use standard positive raketools with largest possibleSCEA and 1/16 in. nose radius. lf brazed tool bargrind 0° back rake, 10° posside rake, 1/32 in. nose radius and largest possible SCEA.Speed: 70 sfm depending on the rigidityof setup, 0.005-0.008 infeed, 1/8 in. depth of cut.Dry, oil or water-base coolant. |
| Finish Boring | C-2 or C-3 grade: Usestandard positive raketools on insert type bars.Grind brazed tools as fofinish turning and facingexcept back rake may bebest at 0°. Speed: 95-110sfm,0.002-0.004 in feed.Water-base coolant. |
Chemical Composition:
| Element | Ni | Mo | Cr | Fe | W | Co | Mn | C | V | P | S | Si |
| Minimum(%) | - | 15 | 14.5 | 4 | 3 | - | - | - | - | - | - | - |
| Max(%) | Bal. | 17 | 16.5 | 7 | 4.5 | 2.5 | 1 | 0.01 | 0.35 | 0.04 | 0.03 | 0.08 |
Processing Flow Chart:
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