ISO 5019-6:2005

Overview

ISO 5019-6:2005 - "Refractory bricks - Dimensions - Part 6: Basic bricks for oxygen steel-making converters" specifies standardized dimensions for basic refractory bricks used to line oxygen steel‑making converters. Prepared by ISO/TC 33 (Refractories), this second edition extends the size range and provides a common basis for manufacturing, specifying and building converter hot-face/working linings.

Key topics and requirements

• Scope: Dimensions of basic refractory bricks for oxygen steel‑making converters, with calculated volumes and the internal lining diameter each brick size suits (diameters given without allowance for joint thickness).
• Size range: The standard covers 18 lining thicknesses, from 250 mm up to 1 200 mm, enabling common design increments for converter linings.
• Brick profiles: For every lining thickness ISO 5019-6 defines a rectangular brick (zero taper) and multiple tapered bricks - either four rates of taper for smaller thicknesses or five to six rates of taper for larger thicknesses.
• Controlled dimensions:
  • Constant median dimension: 150 mm (median size maintained across bricks).
  • Uniform course height: 100 mm (course height of brick courses).
• Brick designation system: Conventional codes use two digit groups separated by a slash (e.g., 50/20). The first group = brick length (lining thickness) in cm (A/10); the second = taper value (C – D) in millimetres; a single zero denotes a rectangular brick.
• Data tables: Table 1 in the standard lists A, B, C/D dimensions, calculated volumes and the internal diameters suitable for each brick size.
• Tolerances: Dimensional tolerances are subject to agreement between purchaser and supplier (not fixed in the standard).

Applications and users

ISO 5019-6 is practical for:

• Refractory manufacturers - for producing bricks to consistent, interoperable sizes.
• Steelmakers and plant engineers - designing and installing basic oxygen converter linings.
• Lining designers and refractory engineers - selecting brick types (taper, thickness) to achieve desired lining geometry and heat/chemical performance.
• Procurement and quality control teams - specifying orders, checking conformity and managing inventory of standard brick sizes.

Benefits include improved interchangeability, simplified inventory, reliable lining geometry calculations and clearer supplier–buyer communication.

Related standards

ISO 5019 is a multipart series on refractory brick dimensions. Related parts include:

• Part 1: Rectangular bricks
• Part 2: Arch bricks
• Part 3: Rectangular checker bricks for regenerative furnaces
• Part 4: Dome bricks for electric arc furnace roofs
• Part 5: Skewbacks

Keywords: ISO 5019-6:2005, refractory bricks, brick dimensions, oxygen steel-making converters, lining thickness, taper, course height, median dimension, refractory standards.