HIC – General
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HIC plate is a carbon steel plate, such as A516 grade 70,
which has been further tested to demonstrate that it is resistant to hydrogen induced cracking.
The steel plate must meet all the standard requirements of the grade – such as chemical composition and have the same mechanical properties – but the manufacturing process has been developed so that when the steel is tested the cracks that form have certain maxima. This gives designers the confidence to use carbon steel boiler plate in sour service avoiding much more expensive stainless steel plate.
It is mainly used for pressure vessel and boiler manufacture in the oil and gas and petrochemical industries where the oil has high sulphur content – known as sour service. Whilst more expensive than normal carbon steel boiler plate, it is significantly cheaper than stainless steel whilst having improved cracking resistance helping to reduce maintenance and full life costs – as well as improved safety over standard boiler plate.
When steels are evaluated for resistance (not immunity) to HIC one of the key factors is the level of sulphur in the steel and typically maximum allowable levels are 0.003% in plates if the acceptance tests in TM0284 are to be met.
You can get HIC plate in the following ASTM grades. A516 gr 70, A516 gr 65 and A516 gr 60.
Quality steel supplied for:
oil & gas, petrochemical & process,construction & shipbuilding industries
HIC Characteristics | HIC Test Certs | HIC Sizes & Dimensions
