BIS Certification for Steel Wire for Mechanical Springs Part-1 cold drawn unalloyed steel wire IS 4454 (Part 1): 2001.

This Indian Standard defines the requirements for cold-drawn unalloyed steel wire used in mechanical springs. It is issued by the Bureau of Indian Standards (BIS) to ensure the wire has the right strength and flexibility and also ensure the wire is:

• Made with proper chemical composition for consistent spring performance
• Strong enough to handle repeated loading and stress in mechanical use
• Suitable for cold drawing to achieve required hardness and flexibility
• Free from defects that may affect spring formation or durability
• Tested for mechanical properties and dimensional accuracy for reliable use

BIS certification as per IS 4454 (part 1) is required for all entities involved in the production and sale of steel wire in India. It’s applicable for:

• Manufacturers – Must obtain BIS certification for cold-drawn steel wires made in India.
• Importers – Must ensure imported products are BIS certified before sale.
• Suppliers/Distributors – Must sell only BIS-compliant product in the market.

• R (Required): Test must be done in the manufacturer’s in-house laboratory
• S (Subcontracting Allowed): Test can be done in a BIS-recognized or NABL-accredited external laboratory

• Element Analysis Test (R) – Checks carbon, manganese, silicon, sulfur, phosphorus, and other elements as per standard limits
• Instrumental Chemical Testing (S) – Uses spectrometer or approved methods to verify correct composition
• Product Analysis Check (R/S) – Ensures final wire composition stays within permitted variation limits

• Diameter Measurement Test (R) – Confirms wire size is within allowed tolerance range
• Surface Inspection (R) – Checks for cracks, rust, scratches, seams, or other surface defects
• Cast Test (R) – Ensures wire is properly straight and does not show unwanted spiral shape when released
• Finish Check (R) – Verifies coating or surface condition is smooth and uniform

• Tensile Strength Test (R) – Confirms wire strength as per required grade and application
• Torsion Test (R) – Checks wire ability to withstand twisting without breaking
• Wrapping Test (R) – Ensures wire does not crack when tightly coiled around a mandrel
• Bend Test (S) – Checks flexibility and resistance to fracture under bending (for larger sizes)
• Coiling & Stretching Test (S) – Evaluates spring behavior and elasticity for fine wires

• Batch or Heat-wise Testing (R)—Each production lot is tested for consistency
• Test Record Maintenance (R)—Proper documentation of all quality checks is maintained
• Marking & Labelling Check (R)—Ensures correct BIS marking, grade, and product details are applied
• Decarburization Check (R/S) – Ensures surface layer quality, mainly for higher-grade wires like DM and DH

1. Online Registration: Manufacturers register on the BIS Manak Online Portal by submitting company details, factory information, and product specifications. Foreign manufacturers must appoint an Authorized Indian Representative (AIR) in India.
2. Testing at BIS-Approved Laboratory: Product samples are tested in BIS-approved laboratories to evaluate electrical safety, insulation resistance, heating efficiency, durability, and overall performance as per requirements.
3. Application Submission: The application is submitted along with laboratory test reports, technical documents, manufacturing process details, and factory information. Foreign manufacturers must also provide AIR-related documents.
4. Factory Inspection: BIS officials conduct an on-site inspection of the manufacturing unit to verify production processes, quality control systems, safety measures, and compliance with the standard.
5. Grant of BIS License: If all requirements are successfully met, BIS issues the certification license under Scheme-I, allowing the manufacturer to produce and sell certified products.
6. Use of ISI Mark: After certification approval, the manufacturer is permitted to use the ISI mark along with a CM/L number on the product, confirming compliance with the standard.

• Application fee for foreign manufacturers is payable via SWIFT (SAARC countries may pay in INR with applicable GST).
• Audit charges for foreign manufacturers vary based on country/location.
• Marking fee depends on the product category and production volume (MSME benefits may apply).
• Testing charges are paid directly to BIS-approved laboratories.
• Consultancy fees depend on product type and factory location.