Forged Fitting, ASTM B564 NO8811 (Incoloy 800HT) Ni-Fe-Cr Alloy Concentric Reducer ANSI B16.5
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Forged Fitting, ASTM B564 NO8811 (Incoloy 800HT) Ni-Fe-Cr Alloy Concentric Reducer ANSI B16.5
ASTM B564 is a standard specification for Nickel Alloy Forgings. The nickel-iron-chromium alloys are UNS NO8120, UNS NO8800, UNS NO8810, and UNS NO8811. Alloy UNS NO8800 is normally employed in service temperatures up to and including 1100 °F (593 °C). Alloys UNS NO8810, NO8120, and UNS N08811 are normally employed in service temperatures above 1100 °F (593 °C) where resistance to creep and rupture is required, and are annealed to develop controlled grain size for optimum properties in this temperature range.
A forged concentric reducer manufactured from nickel-iron-chromium alloy UNS N08811 (Incoloy 800HT) in accordance with ASTM B564 specification. It's also a modified version of alloy 800. With significantly higher creep rupture strength. The higher strength results from close control of carbon, aluminum and titanium contents in conjunction with a high temp anneal.
This product is intended for use in high-temperature service applications requiring excellent creep rupture strength, oxidation resistance, and carburization resistance, typically in petrochemical, chemical processing, and power generation industries.
1.Chemical & Mechanical Properties
| Chemical Composition (%) | ||||||||||
| Grade | Ni | Fe | Cr | Cu | Ti | Al | C | Mn | S | Si |
| Incoloy 800 | 30.0-35.0 | 39.5 min | 19.0-23.0 | .75 max | .15-.60 | .15-.60 | .1 max | 1.5 max | .015 max | 1.0 max |
| Incoloy 800H | 30.0-35.0 | 39.5 min | 19.0-23.0 | .75 max | .15-.60 | .15-.60 | .05-.10 max | 1.5 max | .015 max | 1.0 max |
| Incoloy 800HT | 30.0-35.0 | 39.5 min | 19.0-23.0 | .75 max | .25-.60 | .85-1.20 | .06-.10 max | 1.5 max | .015 max |
1.0 max |
Mechanical Properties
|
Tensile Strength |
Yield Strength (0.2%Offset) |
Elongation |
Density |
Melting Point |
|
75000Psi / 520Mpa |
30000Psi / 205Mpa |
30%-35% |
7.94 g/cm3 |
1350 °C-1400℃ |
2. Key Adventages
- The 800HT modification was to control carbon (0.05 to 0.10%) and grain size to (>ASTM 5) to optimize stress rupture properties. Incoloy 800 HT has further modifications to the combined titanium and aluminum levels (0.85 to 1.2%) to ensure optimum high temperature properties. The alloy is dual certified and combines the properties of both forms.
- The chemical balance allows the alloy to exhibit excellent resistance to carburization, oxidation and nitriding atmospheres. 800HT will not become embrittled even after long periods of usage in the 1200-1600 deg F range where many stainless steels become brittle.
- Excellent cold forming characteristics typically associated with the nickel-chromium alloys are exhibited with 800HT. When cold formed extensively the grain size produces a visibly undulated surface called “orange peel”. 800HT can be welded by the common techniques used on stainless steels.
3. Key Applications
-
Petrochemical Industry
-
Power Generation
-
Industrial Furnaces & Heat Treating Equipment
-
Chemical Processing
-
Nuclear Industry
-
Aerospace & Marine Engineering
-
Other High-Temperature Applications
Available Tests
| Test Type | Standard |
| Chemical Composition Analysis (PMI) | Spectrometer (XRF/OES), ASTM E1019, ASTM B564 |
| Tensile & Impact Test | ASTM E8/E8M, ASTM A370, Charpy V-Notch (Low/Room Temperature) |
| Hardness Test | ASTM E10 (Brinell), ASTM E18 (Rockwell), Vickers |
| Corrosion Resistance Test | ASTM B117 (Salt Spray), Intergranular Corrosion Test, High-Temperature Oxidation Test |
| Non-Destructive Testing (NDT) | UT (Ultrasonic), MT (Magnetic Particle), PT (Liquid Penetrant), RT (Radiographic Testing) |
| Hydrostatic/Pneumatic Pressure Test | ASTM B564, ASME B16.9, Pressure Test for Forged Pipe Fittings (1.5×Working Pressure) |
| Dimensional & Visual Inspection | ASTM B564, ASME B16.9, CMM, Gauge Inspection, Surface Finish Test |
| Material Test Certificate (MTC) | EN 10204 3.1/3.2, ASTM B564 |
| High-Temperature Creep Test | ASTM E139, ASTM B564 High-Temperature Performance Test Standard |
| Forging Quality Test | Metallographic Inspection, Internal Defect Detection, ASTM B564 Forging Requirement |
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