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Reg. 10
MATERIALS OF CONSTRUCTION

STEEL PLATES, RIVETS, SECTION AND BARS IN CARBON STEEL

Chemical Analysis

(a) The steel shall not contain more than 0.05 per cent of sulphur or phosphorus.

(b) A sulphur print test shall be taken from the material of each charge used for rivet bars for the purpose of ensuring that sulphur segregates are not concentrated in the core. The stage in manufacture at which this test is made shall be at the option of the Steel-Maker.

(c) When the material is required for flame cutting and/or welding, the carbon content shall not exceed 0.30% and special precautions shall be taken when the carbon content exceeds 0.26%.

When steels are intended for service temperatures over 700°F the silicon content shall be not less than 0.10% or alternatively, the material shall pass the proof test for creep quality of carbon steel plates of boiler quality.

(d) Plates having thickness of 12 mm and less than that, not intended for hot forming, can be supplied in unnormalized or as rolled condition subject to the condition that the code of manufacture provides for the same. For plates having thickness more than 12mm,  not intended for hot forming, shall be supplied in the normalized conditions:

Provided that the normalizing may be exempted if it is demonstrated by the manufacturer that equivalent properties can be produced by the rolling subsequent cooling.

NOTE:- The boiler manufacturer may, if he so wishes order a check analysis.


 
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Message from Chairman of Central Boilers Board About Central Boiler Board History of Indian Boiler Regulations Foreword Contents Chapter Wise Contents Regulation Wise List of Amendments
Indian Boilers Act 1923 Ibr Forms Home Search Help Contact Us