Specifications
Surface Treatments
Certifications
- ISO 9001 - 2015 Certified
- PED 2014/68/EC
- NACE MR0175/ISO 15156-2
- NORSOK M-650
- DFAR
- MERKBLATT AD 2000 W2/W7/W10
ASTM B564 Incoloy 800H Forgings (UNS N08810 / N08811)
ASTM B564 is the cover specification for nickel and nickel-alloy forgings across a wide list of UNS designations, including UNS N08810 (Incoloy 800H) and UNS N08811 (Incoloy 800HT). It covers forged flanges, forged fittings, valve bodies, pressure-vessel parts, rolled rings and rough-machined blanks supplied in solution-annealed condition for service to 815 deg C (1500 deg F) under ASME Section VIII Division 1. The most recent published revision is ASTM B564-23 and the ASME adoption is SB-564, published in ASME Section II Part B. TorqBolt supplies ASTM B564 Incoloy 800H forgings up to 1500 kg piece weight, including ASME B16.5 flanges (NPS 1/2 inch to 24 inch, Class 150 to 2500) and forged fittings to ASME B16.11, with EN 10204 type 3.1 by default and type 3.2 with Lloyds Register / DNV / BV / SGS / TUV witness on call-out.
Full Scope of ASTM B564
ASTM B564 covers wrought-and-forged product in nickel and nickel-alloy UNS designations. The scope is forged flanges, forged fittings, valve bodies, rolled rings, hammer-forged or upset blanks, and rough-machined product produced by open-die or closed-die forging from ingot, billet or pre-forged stock. The specification governs chemistry, mechanical floors, forging-ratio practice, heat treatment, dimensional tolerances, ultrasonic test and certification. ASTM B564 does NOT cover seamless pipe and tube (B407), rod and bar (B408) or plate (B409). It does cover the bar-from-forging supplied as forging stock above 100 mm cross-section.
ASTM B564 Revision History
| Revision | Year | Notable change |
|---|---|---|
| B564-23 | 2023 | Current revision; added two further UNS designations |
| B564-21 | 2021 | Prior revision |
| B564-15 | 2015 | Aligned grain-size verification with B407 / B409 |
ASTM B564 Chemistry Limits for Incoloy 800H / 800HT
ASTM B564 references the same chemistry windows as ASTM B407 / B408 / B409 for UNS N08810 and N08811. The chemistry table is reproduced below; cross-verify the limits against ASTM B564-23 cover sheet and the Special Metals technical bulletin before mill release.
| Element | N08810 (800H) | N08811 (800HT) |
|---|---|---|
| Carbon (C) | 0.05 to 0.10 | 0.06 to 0.10 |
| Manganese (Mn) | 1.50 max | 1.50 max |
| Sulfur (S) | 0.015 max | 0.015 max |
| Silicon (Si) | 1.00 max | 1.00 max |
| Copper (Cu) | 0.75 max | 0.75 max |
| Nickel (Ni) | 30.0 to 35.0 | 30.0 to 35.0 |
| Chromium (Cr) | 19.0 to 23.0 | 19.0 to 23.0 |
| Aluminium (Al) | 0.15 to 0.60 | 0.25 to 0.60 |
| Titanium (Ti) | 0.15 to 0.60 | 0.25 to 0.60 |
| Al + Ti combined | 0.30 to 1.20 | 0.85 to 1.20 |
| Iron (Fe) | balance | balance |
ASTM B564 Room-Temperature Mechanical Floors
| Property | N08810 forging | N08811 forging |
|---|---|---|
| Tensile strength (Rm) | >= 450 MPa (65 ksi) | >= 450 MPa (65 ksi) |
| 0.2 percent proof stress (Rp0.2) | >= 170 MPa (25 ksi) | >= 170 MPa (25 ksi) |
| Elongation A5 | >= 30 percent | >= 30 percent |
| Hardness HB max | 184 | 184 |
| ASTM grain size | 5 or coarser | 5 or coarser |
Forging Ratio and Hot-Working Practice
ASTM B564 does not mandate a single forging-ratio number. Instead it requires the forging to be worked from ingot to finished shape with sufficient hot work to develop the specified mechanical properties and ASTM grain size 5 or coarser on the through-thickness test sample. Typical TorqBolt mill practice is 3:1 minimum forging reduction from billet to finished shape, with higher ratios for sub-section pieces and rolled rings. The hot-working temperature window is 1149 deg C to 982 deg C (2100 deg F to 1800 deg F) for primary working, with finishing strokes completed above 927 deg C to avoid carbide precipitation in the heat-affected zone.
Solution-Anneal After Forging
Solution-anneal in the high-temperature 1149 deg C minimum cycle is mandatory after forging for the H and HT grades to dissolve carbide networks, develop the ASTM grain size 5 or coarser envelope and meet the creep-rupture floor required by ASME Section VIII allowable-stress tables. Quench is rapid air cool or water quench depending on section thickness. Stress-relief at intermediate temperatures (480 deg C to 760 deg C) is avoided because it sensitises the heat-affected zone and reduces creep-rupture strength.
Inspection and Non-Destructive Test
Visual inspection per ASTM B564 paragraph 16 is mandatory on every forging. Liquid-penetrant test per ASTM E165 is required on machined surfaces of pressure-containing forgings. Ultrasonic test per ASTM A388 acceptance level chosen by the purchaser is required on forgings above 100 mm cross-section intended for pressure-vessel service. Macroetch per ASTM E381 is required on a representative section from each heat to confirm absence of pipe, segregation and porosity in the forging centre.
ASME SB-564 Adoption
ASME Section II Part B publishes SB-564 as the boiler and pressure vessel code adoption of ASTM B564. SB-564 is the qualified source specification for Incoloy 800H / 800HT forgings used in ASME Section VIII Division 1 pressure vessels with maximum design temperature 815 deg C (1500 deg F). Forged flanges to ASME B16.5 and B16.47, forged fittings to ASME B16.11 and forged valve bodies to API 600 / API 6A are routinely produced under SB-564.
Compliant TorqBolt Product Range
| Form | Specification + size range | Page |
|---|---|---|
| Forgings (open-die + closed-die) | up to 1500 kg piece weight | Forgings |
| Flanges | ASME B16.5, NPS 1/2 inch to 24 inch, Class 150 to 2500 | Flanges |
| Forged fittings | ASME B16.11, NPS 1/2 inch to 4 inch, Class 3000 / 6000 | Fittings |
| Machined components | per project drawing, forged blanks | Machined Components |
| Centrifugally cast tubes (companion A608) | ethylene-cracker form | Centrifugally Cast Tubes |
Cross-References and Companion Specifications
- ASTM B407: Seamless pipe and tube in the same UNS designations
- ASTM B408: Rod and bar (forging stock)
- ASTM B409: Plate, sheet and strip
- ASME Section VIII Division 1: Pressure-vessel code adoption
- API 660: Heat-exchanger forged-tubesheet specification
- ASME B16.5 / B16.47 / B16.11: Flange and forged-fitting dimensional standards
Frequently Asked Questions
Q. What products does ASTM B564 cover?
ASTM B564 is the cover specification for nickel and nickel-alloy forgings in a long list of UNS designations, including N08810 (Incoloy 800H) and N08811 (Incoloy 800HT). It covers forged flanges, fittings, valve bodies, pressure-vessel parts and rolled rings supplied in solution-annealed condition for service to 815 deg C (1500 deg F).
Q. Is ASTM B564 adopted by ASME?
Yes. ASME Section II Part B publishes SB-564 as the boiler and pressure vessel code adoption of ASTM B564. SB-564 is the qualified source specification for ASME Section VIII Division 1 forged components in Incoloy 800H / 800HT, including flanges to ASME B16.5 and B16.47.
Q. What is the minimum forging ratio for ASTM B564?
ASTM B564 does not mandate a single forging-ratio number; instead it requires the forging to be worked from ingot to finished shape with sufficient hot work to develop the specified mechanical properties and ASTM grain size 5 or coarser. Typical mill practice is 3:1 minimum forging reduction from billet to finished shape, with higher ratios for sub-section pieces.
Q. Does ASTM B564 require heat treatment after forging?
Yes for Incoloy 800H and 800HT. The solution-anneal high-temperature cycle (1149 deg C minimum, rapid cool) is mandatory after forging to dissolve carbide networks, develop ASTM grain size 5 or coarser and meet the mechanical property and creep floor.
Q. Can ASTM B564 forgings be supplied with NACE MR0175 compliance?
Yes. Incoloy 800H forgings to ASTM B564 are supplied with NACE MR0175 / ISO 15156 compliance for sour-service applications when the operating envelope permits, with hardness verification by Rockwell B method and impact testing at the agreed test temperature.
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