ISO 2804:1996

Overview - ISO 2804:1996 (As‑sintered pellets of hardmetal / carbide - Dimensions)

ISO 2804:1996 specifies standardized dimensions and tolerances for as‑sintered hardmetal (carbide) pellets used as cores for wire, bar and tube drawing dies. The standard defines a series of outside diameters, a range of bore sizes, certain internal dimensions and associated machining allowances and tolerances. It applies to pellets with cylindrical bores intended for application groups A to F as defined in ISO 1684 (steel/non‑ferrous wire, bar and tube drawing dies).

Key topics and technical requirements

• Dimensional series: Standardized outside diameters (do2), bore sizes (do1) and internal dimensions for pellet types (figures and tables provide type I, II, III for wire pellets and specific shapes for bar/tube pellets).
• Tolerances: Detailed tolerances for outside diameter, bore diameter and height (ho2) are given in tabular form (tables 2–4 and 7–9). These tolerances govern manufacturing and inspection limits.
• Machining allowance: Specified machining allowances on do1 for bar/tube pellets (table 6). Minimum machining allowances and how to determine do1 when ordering are described.
• Designation rules: Defined designation format for ordering and documentation (e.g., “Pellet for drawing die ISO 2804‑A 14‑0.6”), including code‑letters A–F for application (A = steel wire, B = non‑ferrous wire, C–F = bar/tube variants).
• Scope limits: Applies only to as‑sintered pellets with cylindrical bores and to application groups A–F (see ISO 1684 for die specifications and application definitions).
• Ordering considerations: Several dimensions (e.g., certain radii, some internal measures) are to be agreed between customer and supplier rather than being fully standardized.

Applications and users

ISO 2804:1996 is practical for:

• Pellet manufacturers standardizing product lines for drawing dies.
• Drawing die manufacturers / toolmakers who machine and finish as‑sintered pellets into final dies conforming to ISO 1684.
• Wire, bar and tube producers specifying die cores to ensure consistent drawing performance and interchangeability.
• Quality and procurement teams verifying tolerances, machining allowances and correct designation in orders and inspection plans.

Benefits include improved cooperation between suppliers and die manufacturers, predictable machining conditions and consistent die performance.

Related standards

• ISO 1684 - Wire, bar and tube drawing dies with hardmetal (carbide) core - specifications (normative reference for application groups and die requirements).

Keywords: ISO 2804:1996, as‑sintered pellets, hardmetal, carbide, drawing dies, wire drawing, bar drawing, tube drawing, dimensions, tolerances, machining allowance, ISO 1684, pellet designation.