What is the meaning of R-HIC and HIC for A516 Gr 60 steel plate

A516 Gr 60 steel plate (R-HIC) and A516 Gr 60 steel plate (HIC) are hydrogen sulfide corrosion-resistant and hydrogen resistant steel plates, which are American Standard Vessel Plates, and are in accordance with ASTM standards.

A516 Gr 60 steel plate (HIC) refers to the steel grade A516 Gr 60, and only HIC is conducted for corrosion test. The composition requires heat analysis P ≤ 0.015, S ≤ 0.003, and finished product analysis P ≤ 0.015, S ≤ 0.004.

A516 Gr 60 steel plate (R-HIC) refers to the steel grade A516 Gr 60. The corrosion test is conducted with HIC test and SSCC test. The composition requirements are smelting analysis P ≤ 0.015, S ≤ 0.003; finished product analysis P ≤ 0.015, S ≤ 0.004.

A516 Gr 60 steel plate (R-HIC) and A516 Gr 60 steel plate (HIC) shall be subject to simulated post weld heat treatment for test samples. The recommended simulated post weld heat treatment temperature is 620 ± 15 ℃, holding time is 8 hours, the temperature is above 400 ℃, and the temperature rise and fall speed is ≤ 150 ℃ / h. If the simulated post weld heat treatment system is inconsistent with the recommended heat treatment system, the specific simulated post weld heat treatment system shall be indicated in the contract.