ASTM Standard Reference
ASTM B387/B387M-23
Molybdenum and Molybdenum Alloy Bar, Rod, and Wire
Reference status
Standard at a Glance
Publication Status
Active edition, last updated 10 February 2023.
Material Family
Unalloyed molybdenum, TZM and a specified molybdenum–tungsten alloy.
Product Forms
Bar, rod and wire.
Publisher
ASTM International. The official record and purchased publication are the authoritative sources.
Scope
What This Standard Covers
ASTM B387/B387M-23 is a product specification for bar, rod and wire made from defined unalloyed molybdenum and molybdenum-alloy material groups.
The standard includes chemical and mechanical requirements for the covered forms. Its wire scope starts at ≥0.02 in (≥0.51 mm); smaller electronic wire is addressed by ASTM F289.
Procurement use
Materials and Product Forms
The material-number framework is aligned with the related flat-product specification, but the applicable requirements are specific to bar, rod and wire.
- Molybdenum 360, 361 and 365 — defined unalloyed molybdenum routes;
- Alloy 363 and Alloy 364 — TZM material routes;
- Alloy 366 — molybdenum–30 % tungsten material;
- covered product forms are bar, rod and wire at sizes within the standard’s scope.
Inquiry preparation
Ordering and Verification Points
A quotation should be based on the customer’s governing specification and the requirements stated in the inquiry, drawing, purchase order or project documentation. Include:
- the full ASTM designation and required edition;
- the material grade, alloy or manufacturing route stated by the project;
- the required product form, dimensions, tolerances, condition and surface requirements;
- quantity, inspection and test requirements, acceptance criteria and requested inspection documents;
- any supplementary requirements, drawing references, packing instructions and delivery destination.
Cross-reference
Relationship to Other Standards
ASTM B386/B386M addresses flat products. ASTM F289 covers smaller wire and rod intended for electronic applications under its own grade and dimensional framework. ASTM B1024/B1024M addresses isotropic unalloyed molybdenum.
Related designations are not automatically equivalent. Any comparison with EN, ISO, DIN, GOST, TU, manufacturer grades or customer specifications must be checked against the applicable technical documents and certificates. Apply SI and inch-pound requirements separately; do not mix values from the two systems when assessing conformity.
Access
Copyright and Official Publication
MNK-G.S.A does not reproduce the copyrighted ASTM document, protected tables or acceptance limits on this page. The summary is an original procurement reference. Obtain the governing publication from ASTM International.
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Related MNK pages
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Molybdenum & TZM Materials
Supply forms, sourcing scope and technical inquiry requirements for molybdenum materials.
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Source Against the Required Standard
Send the designation, grade, product form, dimensions, quantity, inspection-document requirements and delivery destination. MNK-G.S.A will verify the sourcing basis before quotation.
Technical Sources & Revision
Source: ASTM International. ASTM B387/B387M-23
Document / edition: ASTM B387/B387M-23
Source used for: The public ASTM International catalogue record supports the document identity, edition and scope summary on this page. It is used for the stated material or product coverage and the named test or inspection method, where applicable. It does not establish product conformity or replace numerical requirements in the full publication.
Technical source review:
Review scope: the public publisher record and this procurement summary, not a clause-by-clause audit of the full standard. For acceptance, use the governing publication, purchase specification and product or test documentation.