ASTM F1267 is the governing standard for flattened expanded metal. This page sets out the scope of the document, reproduces the full specification table, and lists the ISO/ASTM/DIN cross-references cited in datasheets and purchase orders.
ASTM F1267 — Scope
ASTM F1267 specifies the designation system, dimensions and tolerances of flattened expanded metal — mesh count or nominal opening, wire diameter and the permissible aperture deviations. Alloy chemistry, mechanical testing and delivery condition are governed by separate documents in the same standards family.
Tolerance Classes
ASTM F1267 defines tolerance limits on the average aperture and on the maximum single aperture, tightening as the aperture gets finer. For test-sieve duty the tighter ISO 3310-1 tolerances apply instead of the general cloth tolerances — specify sieve grade explicitly if the mesh will be used for particle-size analysis.
Specifications Defined by ASTM F1267
| Mesh designation (SWD x LWD) | SWD (mm) | LWD (mm) | Strand width (mm) | Strand thickness (mm) | Open area (%) |
|---|---|---|---|---|---|
| 6x12 | 6 | 12 | 1.0 | 1.0 | 62 |
| 10x20 | 10 | 20 | 1.5 | 1.5 | 66 |
| 12.5x25 | 12.5 | 25 | 2.0 | 2.0 | 60 |
| 16x34 | 16 | 34 | 2.0 | 2.0 | 70 |
| 22x50 | 22 | 50 | 3.0 | 3.0 | 67 |
Companion Standards
ASTM F1267 controls the geometry of flattened expanded metal. Companions frequently cited alongside it: ISO 565 / ASTM E11 (test-sieve aperture series), ISO 3310-1 (test sieves of metal wire cloth), ISO 4783 (selection of wire and aperture combinations), ISO 9044 (industrial woven wire cloth), and ISO 2941 (collapse/burst rating for finished filter elements).
When to Specify ASTM F1267
ASTM F1267 is the US-market reference; for metric programs pair it with the ISO designation so both markets read the order identically.
