Q245R steel Vs Q245R (R-HIC) steel

Q245R steel is an ordinary boiler plate, the current executive standard number: GB/T 713-2014, the current flaw detection executive standard: NB/T 47013.3-2015. The rolling process is divided into: hot rolling AR, controlled rolling CR, usually heat treatment process is normal N. Normally, the thickness of 36mm or more is required for normalizing delivery, but with the permission of the user, 36mm or more can also be delivered in hot rolled AR and controlled rolling CR. The Q245R steel plate usually has an impact energy temperature of 0°C. The impact energy value requires 34J or more.
 
Steel Q245R (R-HIC) is a hydrogen sulfide resistant plate. The normal heat treatment is normalizing, the flaw detection is Level I, the impact temperature is 0 ℃. If there are special requirements, Z15, Z25, Z35 and other Z-direction performance tests are required. On the basis of Q245R steel plate, two additional tests are added: HIC test (hydrogen-induced cracking test) and SSCC test (sulfide stress corrosion test). After the test, the melting analysis values of phosphorus (P <= 0.015) and sulfur (S < = 0.003); Analysis of phosphorus content (P <= 0.015) and sulfur content (S <= 0.004) in finished products The test is divided into three levels: Level I, II and III.

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