ASTM B550 Zirconium Wire: Grades and Order Requirements

ASTM B550/B550M covers zirconium and zirconium alloy bar and wire. When specifying zirconium wire, identify the grade, dimensions, material condition and applicable edition before selecting inspection and documentation. Compliance with a material specification must be demonstrated for the supplied lot.

Grades and specification scope

The specification identifies grades including UNS R60702, unalloyed zirconium, and R60705, a zirconium-niobium alloy. The grades have different requirements: consult the contracted edition for the applicable chemistry, mechanical properties, dimensions and inspection. A limit for one grade must not be applied to every grade. ASTM B550/B550M covers bar and wire; it is not a blanket specification for forgings or every other product form.

For a quotation, state the UNS grade, wire diameter and tolerance, coil or straight length, surface and delivery condition, quantity, required inspection and material certificates. Confirm availability and the edition and product form for the individual order.

Corrosion and service selection

Zirconium may be considered for certain chemical process environments. Corrosion resistance depends on the complete medium, concentration, temperature, impurities, flow, crevices and exposure time. Evaluate the actual process and use relevant corrosion evidence; material designation alone does not establish a corrosion rate, equipment life or suitability in every acid or mixed chemical environment.

Nuclear applications and material records

ASTM B550 designation by itself does not establish qualification for nuclear service. Nuclear applications may require different material specifications, traceability, testing and project approval. Confirm the applicable requirements with the responsible design authority before procurement. A material certificate describes the supplied material and agreed tests; it does not qualify a finished component.

Frequently asked questions

Does ASTM B550 cover zirconium wire?

Yes. Specify the applicable edition and confirm the ordered grade, dimensions and condition.

Are R60702 and R60705 interchangeable?

No. Select the grade against the design and the contracted material requirements.

Explore our zirconium wire category or request a quotation with your grade, dimensions, condition, application and documentation requirements.