ANNEXURE TO ENQUIRY FOR ELECTRO FORGED GRATINGS

TECHNICAL SPECIFICATION FOR HOT DIP GALVANIZING

The hot dip galvanised MS solid flat shall conform to the relevant IS specification briefed here below:

1. MATERIAL:

a) This Mild Steel Flat shall have the chemical composition maximum

Sulphur - 0.050 %.

Phosphorus - 0.050 %,

Carbon - 0.23 %.

Manganese -1.50 %

b) Zinc shall conform to grade Zn 98 specified IS: 209-1966 & IS: 4826-1979 with up to date

amendments.

2. ZINC COATING:

The minimum Zinc coating shall be 610 gm/sq m. Shall be in accordance with IS: 4759-1996 for heavily coated

hard quality.

3. GALVANISING: Shall be as per IS: 2629-1985 with up-to-date amendments.

4. UNIFORMITY OF ZINC COATING: Shall be as per IS: 2633-1972 with up-to-date amendments.

5. TENSILE PROFERTIES: The tensile strength of the Flat after galvanizing shall be as per IS: 2062 ensuring

MS Flat Mechanical properties as per IS-1608 1972.

6. FREEDOM FROM DEFECTS: As per IS: 2629-1966 with up-to-date amendments, be ensured.

7. TESTS: During the process of manufacture/fabrication and finish all tests for chemical, mechanical,

galvanizing tests as per IS: 2062-1999, IS: 2663-1972, IS: 4759, IS: 6745-1972 be ensured. Test Certificate

towards chemical composition shall be submitted for each lot offered for inspection.

The below said tests shall be conducted in presence of THIRD PARTY at your works.

a) Visual physical inspection and measurement of specified dimensions.

b) Coating test as per IS: 4759-1996, IS: 2633-1972 & 1979 & IS:67451972.

c) Adhesion test as per IS: 2629-1966, IS: 6745-1972.

d) Tensile strength and breaking load and elongation determined as per IS: 2062-1972 with up-to-date

amendments.