BS ISO 14788:2005
$102.76
Continuous hot-dip zinc-5% aluminium alloy coated steel sheet
| Published By | Publication Date | Number of Pages |
| BSI | 2005 | 22 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 9 | 3.6 4 Requirements 4.1 Chemical composition Table 1 — Chemical composition (heat analysis) , % Base-metal quality Mn Ti |
| 10 | Table 2 — Limits on additional chemical elements , % Element Cu a Ni a Cr a, b Mo a, b Nb c V c, d Ti d Table 3 — Product analysis tolerances , % Element Maximum of specified element Tolerance over maximum specified 4.2 Mechanical properties 4.2.1 Commercial and drawing qualities Zinc-5 % aluminium alloy coated steel sheet of designations 01, 02, 03,and 04 is supplied under the following a) Ordering condition A): steel when ordered to mechanical properties shall, at the time the steel is made 4.2.2 Structural quality The mechanical properties, at the time the steel is made available for shipment, shall satisfy the requirements |
| 11 | Table 4 — Mechanical properties Base-metal quality a A min. d % Designation Name 4.3 Coating 4.3.1 Coating mass |
| 12 | 4.3.2 Coating adherence Table 5 — Mechanical properties of structural-quality steels Grade R e a min Table 6 — Coating mass test limits for zinc-5 % aluminium alloy coated steel sheet Coating designation Triple-spot test Single-spot test |
| 13 | Table 6 — ( continued ) Triple-spot test Single-spot test Coating designation Table 7 — Coating adherence — Bend test mandrel diameter Coated metal-180° bend mandrel diameter, mm Base-metal quality |
| 14 | 4.4 Weldability 4.5 Painting 4.6 Surface treatment 4.6.1 Mill passivation 4.6.2 Oiling 4.7 Coated coil joining 4.8 Dimensional and shape tolerances A. The tolerances for thickness of the base metal shall be as given in ISO 16160 for hot-rolled steel, and 5 Sampling 5.1 Chemical composition A heat analysis of each heat shall be made by the manufacturer to determine compliance with the |
| 15 | 5.2 Tensile test 5.3 Coating tests 5.3.1 Coating mass 5.3.1.1 The producer shall develop a testing plan with a frequency sufficient to adequately characterize 5.3.2 Triple-spot test The triple-spot test result shall be the average coating mass found on the three specimens taken according 5.3.3 Single-spot test 5.4 Coating adherence 5.5 Retest 6 Test methods 6.1 Tensile tests a) Option A — Determine the actual base-metal thickness through direct measurement of the substrate of a |
| 16 | 6.2 Coating properties 6.2.1 Coating mass 6.2.2 Coating adherence Bend tests shall be conducted in accordance with the methods specified in ISO 7438. 7 Designation system The designation system includes the coating name, coating type, coating mass, coating condition, surface 7.1 Coating name The letters ZA are used to indicate the zinc-5 % aluminium alloy coating. 7.2 Coating type The designators T1 and T2 are used to indicate the type of coating (see 1.4). 7.3 Coating mass 7.4 Coating condition The conditions of coating designations are: N: normal spangle coating (as-produced); S: smooth finish (skin passed). |
| 17 | 7.5 Surface treatment The surface treatment designations are: O oiling; CO mill passivation plus oiling; C mill passivation. 7.6 Base-metal quality The base-metal quality designations are: 01 Commercial; 02 Drawing; 03 Deep drawing aluminum killed (non-aging); 04 Extra deep drawing (stabilized interstitial free). Three digits as described in Table 5 indicate structural grades. 7.7 Examples 7.7.1 An example of a complete designation is ZAT1 160NC02. This designation example includes the ZA: Zinc-5 % aluminium alloy coating; T1: coating Type 1; 160: coating mass designation; N: normal spangle coating condition; C: mill passivation; 02: drawing quality. 7.7.2 An example of a complete designation for one of the structural-quality products is ZAT2 150SCO350. ZA: Zinc-5 % aluminium alloy coating; T2: coating type 2; 150: coating mass designation; CO: mill passivation plus oiling; 350: structural steel grade. |
| 18 | 8 Resubmission 8.2 The manufacturer has the right to present the rejected products to a new examination for compliance 9 Workmanship 10 Inspection and acceptance 10.2 Steel that is reported to be defective after arrival at the user’s works shall be set aside, properly and 11 Marking a) manufacturer’s name or identifying brand; b) reference to this International Standard, i.e. ISO 14788; c) product designation (coating, type, coating mass, coating condition, surface treatment and quality or d) order number; e) product dimensions; f) lot number; g) mass. 12 Information to be supplied by the purchaser To adequately specify requirements in accordance with this International Standard, enquiries and orders a) reference to this International Standard, i.e. ISO 14788; |
| 19 | b) complete designation of the material, i.e. coating name, coating type, coating mass, coating condition, d) the application (name of part), if available; e) ordering condition A or B; f) mill passivation, if required (see 4.5.1); g) oiling, if required (see 4.5.2); h) report of heat analysis and/or mechanical properties, if required (see 4.1 and 4.2); i) details of fabrication, special requirements or application (i.e. coating performance, non-fluting, paintability, j) inspection and tests for acceptance prior to shipment from the producer’s works, if required (see |
| 20 | Annex A Orders requiring base-metal thickness Figure A.1 — Calculation of the average coated product thickness Table A.1 — Average thickness for coating mass — Total both sides Coating designation Average coating thickness 1) for calculation mm |
| 21 | Bibliography [1] ASTM A875/A875M — Standard Specification for Steel Sheet, Zinc-5 % Aluminum Alloy-Coated by [2] JIS G3317 — Hot-dip zinc-5 % aluminum alloy-coated steel sheets and coils 1) |
