Q245R (R-HIC) and Q245R (HIC) and Q245R are different

Q245R (R-HIC) and Q245R (HIC) and Q245R are different

Q245R (R-HIC) and Q245R (HIC) and Q245R Difference
Q245R (R-HIC) refers to the steel grade Q245R, also known as hydrogen-resistant steel. Among them, R-HIC represents two kinds of corrosion experiments: one is the sulfide stress corrosion test, referred to as SSCC, and the other is the anti-hydrogen-induced cracking test referred to as Q245R (R-HIC) on behalf of the plate surface to

do two experiments, while Q245R (HIC) only does the anti-hydrogen-induced cracking test, and Q245R is a conventional steel plate for containers, which has a big gap with the first two in terms of performance.

The delivery condition is normalized. Specimen status: all steel plates should be simulated post-weld heat treatment for their inspection samples, recommended simulated post-weld heat treatment temperature: 620±10 °C, holding time: 8 hours, temperature above 400 °C loading furnace, temperature rise and fall speed ≤ 150 °C/h, if inconsistent with the recommended heat treatment system, the specific simulation of post-welding heat treatment system is indicated in the contract.

The HIC test should be accepted in batches, and each batch is composed of steel plates with the same heat treatment system, the same heat treatment number, the same thickness, and the same heat treatment system. When the thickness is not more than 30mm, a group of samples is taken, and the sample size is plate thickness * 20mm * 100mm; When the thickness is greater than 30mm, a group of samples is taken from 1/2 of the thickness, and the sample size is 20mm*20mm*100mm.