\n| Certifying authority<\/td>\n | Bureau of Indian Standards (BIS)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n The 2024 QCO specifies implementation with immediate effect for IS 1673:1984. The 2025 amendment deferring certain other entries does not list Serial No. 67 among the deferred entries.<\/p>\n Accordingly, manufacturers covered by the QCO must obtain the applicable BIS licence and comply with the Standard Mark requirements before supplying the regulated product in the Indian market.<\/p>\n Important:<\/strong> QCO applicability should always be checked against the latest Ministry of Steel notifications, including any subsequent amendments or product-specific exemptions.<\/p>\n3. Product Scope under IS 1673:1984<\/h2>\nIS 1673:1984 covers cold-drawn mild steel wire intended for cold heading and thread rolling.<\/p>\n The standard specifies two grades of wire and covers the following principal characteristics:<\/p>\n \n- Chemical composition<\/li>\n
- Mechanical properties<\/li>\n
- Tensile strength<\/li>\n
- Reverse torsion behaviour<\/li>\n
- Crushing characteristics<\/li>\n
- Dimensions and tolerances<\/li>\n
- Freedom from defects<\/li>\n<\/ul>\n
The manufacturer should identify the exact grade, diameter range and product configuration proposed for certification.<\/p>\n A product made to a different Indian Standard should not automatically be considered covered by IS 1673 merely because it is also mild steel wire.<\/p>\n 4. Technical and Quality Requirements under IS 1673:1984<\/h2>\nThe standard establishes technical requirements to ensure that the wire is suitable for cold forming operations.<\/p>\n 4.1 Chemical Composition<\/h3>\nChemical composition is an important factor in determining the formability and mechanical behaviour of mild steel wire.<\/p>\n The standard specifies chemical requirements for the applicable grades. The relevant chemical parameters include:<\/p>\n \n- Carbon<\/li>\n
- Manganese<\/li>\n
- Sulphur<\/li>\n
- Phosphorus<\/li>\n
- Silicon<\/li>\n<\/ul>\n
The chemical composition must conform to the applicable limits specified in IS 1673:1984, including its applicable amendments.<\/p>\n Manufacturers should maintain traceability between incoming steel, heat numbers, production batches and finished wire coils.<\/p>\n 4.2 Mechanical Properties<\/h3>\nThe wire must satisfy the mechanical requirements prescribed by the standard.<\/p>\n Important mechanical characteristics include:<\/p>\n \n- Ultimate tensile strength<\/li>\n
- Reverse torsion performance<\/li>\n
- Crushing test performance<\/li>\n<\/ul>\n
These tests help establish whether the wire has the required strength and can withstand the forming operations for which it is intended.<\/p>\n 4.3 Reverse Torsion Test<\/h3>\nThe reverse torsion test is used to assess the wire’s ability to withstand repeated twisting without unacceptable failure.<\/p>\n The test helps identify problems associated with material quality, internal defects and processing conditions.<\/p>\n 4.4 Crushing Test<\/h3>\nThe crushing test evaluates the wire’s behaviour under the deformation conditions specified in the standard.<\/p>\n It is an important quality check for wire intended for cold forming applications.<\/p>\n 4.5 Dimensions and Tolerances<\/h3>\nThe wire must comply with the dimensional requirements specified in IS 1673:1984.<\/p>\n Manufacturers should establish suitable inspection arrangements for:<\/p>\n \n- Wire diameter<\/li>\n
- Dimensional tolerances<\/li>\n
- Product consistency<\/li>\n
- Surface condition<\/li>\n<\/ul>\n
4.6 Freedom from Defects<\/h3>\nThe finished wire should be free from defects that may adversely affect its intended use.<\/p>\n Manufacturers should establish suitable inspection and process controls to prevent unacceptable surface defects and other non-conformities.<\/p>\n Note: Exact numerical limits, test conditions and acceptance criteria must be taken from the applicable edition of IS 1673:1984 and its amendments. They should not be replaced with generic mild-steel wire specifications.<\/em><\/p>\n5. Testing Requirements for BIS Certification<\/h2>\nProduct testing is an important part of BIS certification.<\/p>\n The BIS laboratory information system lists testing requirements for IS 1673:1984, including the following parameters:<\/p>\n \n\n\n| Test \/ Inspection<\/th>\n | Purpose<\/th>\n<\/tr>\n | \n| Chemical analysis \u2013 Carbon<\/td>\n | Verification of carbon content<\/td>\n<\/tr>\n | \n| Chemical analysis \u2013 Manganese<\/td>\n | Verification of manganese content<\/td>\n<\/tr>\n | \n| Chemical analysis \u2013 Sulphur<\/td>\n | Verification of sulphur content<\/td>\n<\/tr>\n | \n| Chemical analysis \u2013 Phosphorus<\/td>\n | Verification of phosphorus content<\/td>\n<\/tr>\n | \n| Chemical analysis \u2013 Silicon<\/td>\n | Verification of silicon content<\/td>\n<\/tr>\n | \n| Ultimate tensile strength<\/td>\n | Verification of mechanical strength<\/td>\n<\/tr>\n | \n| Reverse torsion test<\/td>\n | Evaluation of torsional performance<\/td>\n<\/tr>\n | \n| Crushing test<\/td>\n | Evaluation of deformation behaviour<\/td>\n<\/tr>\n | \n| Dimensions and tolerances<\/td>\n | Verification of dimensional conformity<\/td>\n<\/tr>\n | \n| Freedom from defects<\/td>\n | Assessment of surface and product quality<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n The final testing programme should be established using the current standard, amendments and applicable BIS product certification requirements.<\/p>\n Laboratory testing charges:<\/strong> BIS LIMS entries show laboratory-specific charges. One published laboratory scope lists a total testing charge of \u20b915,000 for IS 1673:1984, with individual test charges displayed separately. This is a laboratory-specific reference, not a universal BIS testing fee. Actual charges should be confirmed with the selected laboratory.<\/p>\n6. Manufacturing and Quality Control Requirements<\/h2>\nA manufacturer applying for BIS certification should demonstrate that its production and inspection arrangements are capable of consistently producing wire conforming to IS 1673:1984.<\/p>\n Depending on the actual manufacturing process, the following operations may be relevant:<\/p>\n \n- Procurement and inspection of steel wire rod.<\/li>\n
- Verification of incoming raw material.<\/li>\n
- Wire drawing.<\/li>\n
- Intermediate process inspection.<\/li>\n
- Heat treatment or other processing, where applicable to the manufacturing route.<\/li>\n
- Final dimensional inspection.<\/li>\n
- Mechanical and chemical testing.<\/li>\n
- Coil identification and batch traceability.<\/li>\n
- Final inspection and dispatch control.<\/li>\n<\/ol>\n
The actual manufacturing process and equipment required will depend on the product and the manufacturer’s declared scope.<\/p>\n The factory should maintain suitable records for raw materials, production, inspection, testing, non-conforming products and calibration.<\/p>\n 7. Documents Required for BIS Certification<\/h2>\nThe following documents are generally relevant when preparing a BIS application for Mild Steel Wire, Cold Heading Quality.<\/p>\n | |