21 Oktober 2026

ASTM B564 UNS N06625 Flanges: Grad 1 vs Grade 2

Schnelle Antwort: ASTM B564 covers nickel-alloy forgings, einschließlich UNS N06625 Flansche, but it recognizes two heat-treatment conditions. Grad 1 is annealed and is normally employed up to 1100°F (593°C). Grad 2 is solution annealed and is normally employed above 1100°F where resistance to creep and rupture is required. These are specification conditions—not universal design limits. The purchase order must also define the flange standard, Größe, Klasse, gegenüber, bore and testing.

View Inconel 625 Flansche

Buyers often write only “ASTM B564 UNS N06625 flange.” That identifies the material route, but it does not fully define the required item. Grad 1 versus Grade 2 affects heat-treatment condition and intended temperature regime, während ASME B16.5 or another dimensional standard controls a different part of the order.

Was ASTM B564 Abdeckungen

ASTM B564 is a material specification for nickel-alloy forgings. Für UNS N06625, it sets requirements associated with chemistry, Wärmebehandlung, mechanical properties and testing. It does not, by itself, define every flange dimension or pressure-temperature rating.

Keep the standards separate: ASTM B564 answers “what forged material and condition?” A dimensional standard such as ASME B16.5 answers “what flange dimensions, Toleranzen, marking and pressure-temperature framework?” The project specification and purchase order connect both.

ASTM B564 Grad 1 vs Grade 2

Überprüfen Grad 1 Grad 2
Zustand Geglüht Lösungsgeglüht
ASTM service note Normally employed up to 1100°F (593°C) Normally employed above 1100°F (593°C) where creep and rupture resistance are required
Buyer action State Grade 1 and verify the required condition on the MTC State Grade 2 and verify the solution-annealed condition and project requirements
Auswechslung Do not substitute one grade for the other without engineering and purchasing approval.

The 1100°F boundary is not permission to select a flange from temperature alone. Auslegungsdruck, applicable code rules, Korrosionsumgebung, fabrication history, mating components and project-specific acceptance criteria still need review. Hot working or subsequent reannealing can also affect properties, so the delivered condition and traceability matter.

ASTM B564 vs ASME B16.5

ASTM B564 Und ASME B16.5 are complementary, not competing specifications. A usable order may identify ASTM B564 UNS N06625 Grad 1 oder Note 2 for the forged material, Dann ASME B16.5 for the applicable flange size, Klasse, Abmessungen, Toleranzen, marking and testing framework.

"Legierung 625 flange” is therefore incomplete. Buyers should add flange type, NPS oder DN, Klasse oder PN, gegenüber, Bohrung oder passender Rohrplan, Maßnorm und Ausgabe. Pressure class is not a material grade, and Grade 1 oder Note 2 is not a pressure rating.

What to Check on the MTC

The MTC should be checked against the purchase order and the adopted specification edition. Zumindest, review:

  1. Materielle Identität: ASTM B564, UNS N06625 and the ordered Grade 1 oder Note 2 Zustand.
  2. Rückverfolgbarkeit: heat or lot reference connected to the flange marking and item documentation.
  3. Wärmebehandlung: the reported condition and any required temperature record or statement.
  4. Chemistry and mechanical results: actual reported values assessed against the governing edition and purchase order.
  5. Required tests: only the examinations, supplementary requirements and acceptance criteria actually invoked by the order.
  6. Certification scope: document type, manufacturer identity, inspector or third-party endorsement when contractually required.

Producer datasheets are useful for typical alloy behaviour, but typical values are not acceptance limits for a purchase order. Acceptance should follow the cited material specification, dimensional standard and project requirements.

RFQ Checklist for UNS N06625 Flansche

RFQ field Information to state
Material ASTM B564 UNS N06625, Grad 1 oder Note 2, with edition if controlled by the project
Flange definition Typ, NPS/DN, class/PN, gegenüber, Bohr- oder Rohrplan, und Maßstandard
Service Design and operating temperature/pressure, process medium and relevant upset or cleaning conditions
Quality plan MTC-Typ, NTE, PMI, Härte, supplementary requirements and third-party inspection when required
Kommerzielle Details Menge, Ziel, Verpackung, requested delivery and approved manufacturer restrictions

Häufig gestellte Fragen

Ist ASTM B564 das gleiche wie Inconel 625?

NEIN. ASTM B564 is a product/material specification. UNS N06625 is the alloy designation commonly associated with Alloy 625; Inconel is a trademark. A controlled order should cite the applicable specification, UNS-Nummer, grade or condition and product details.

Tut ASTM B564 define flange pressure class?

NEIN. Grad 1 and Grade 2 describe material conditions. Pressure class belongs to the applicable flange standard and must be evaluated with temperature, material grouping and code requirements.

Kann benoten 2 replace Grade 1?

Nicht automatisch. Even if Grade 2 is solution annealed, substitution can affect the approved specification, design review, documentation and commercial scope. Obtain formal approval first.

Which standard applies to Alloy 625 Flansche?

ASTM B564 wird häufig verwendet für UNS N06625 forged flange material. The flange also needs an applicable dimensional standard such as ASME B16.5, or another project-specified standard for its size and type.

Primary References

Request an Alloy 625 Flange Review

Senden Sie die erforderliche Note, Flanschtyp, Größe, Klasse, gegenüber, langweilig, Menge, Servicebedingungen, dimensional standard and inspection requirements. SASAFLANGE can review the item list and identify missing details before quotation.

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