View Inconel 625 Bridas

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

Qué ASTM B564 Covers

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

ASTM B564 Calificación 1 frente a grado 2

The 1100°F boundary is not permission to select a flange from temperature alone. Presión de diseño, applicable code rules, ambiente de corrosión, 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 y ASME B16.5 are complementary, not competing specifications. A usable order may identify ASTM B564 UNS N06625 Calificación 1 or Grade 2 for the forged material, entonces ASME B16.5 for the applicable flange size, clase, dimensiones, tolerancias, marking and testing framework.

“Alloy 625 flange” is therefore incomplete. Buyers should add flange type, NPS o DN, clase o PN, frente a, diámetro interior o tabla de tubería correspondiente, estándar dimensional y edición. Pressure class is not a material grade, y grado 1 or Grade 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. Como mínimo, review:

1. Identidad material: ASTM B564, UNS N06625 and the ordered Grade 1 or Grade 2 condición.
2. Trazabilidad: heat or lot reference connected to the flange marking and item documentation.
3. Tratamiento térmico: 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 Bridas

Preguntas frecuentes

Es ASTM B564 lo mismo que inconel 625?

No. 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, número UNS, grade or condition and product details.

Hace ASTM B564 define flange pressure class?

No. Calificación 1 y grado 2 describe material conditions. Pressure class belongs to the applicable flange standard and must be evaluated with temperature, material grouping and code requirements.

Can Grade 2 replace Grade 1?

No automáticamente. 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 bridas?

ASTM B564 se utiliza comúnmente para 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

• ASTM B564-25 specification page — scope and Grade 1/Grade 2 service notes.
• ASME B16.5-2025 descripción general — flange ratings, dimensiones, tolerancias, marking and testing scope.
• Special Metals INCONEL alloy 625 boletín — typical alloy data; not a substitute for specification acceptance limits.