In the environment of sulfide corrosion and static tensile stress at the same time under the action of crack according to sulfide stress corrosion cracking (SSC)
SSC standards: laboratory tests
NACE TM0177: Laboratory Testing of Metals for Resistance to Sulfide Stress Cracking and Stress Corrosion Cracking in H2S Environments
The American association of corrosion engineering standards:
NACE MR0175：Metals for Sulfide Stress Cracking and Stress Corrosion Cracking Resistance in Sour Oilfield Environments
NACE MR0175 and NACE TM0177 Applies to all products of corrosion resistant steel, pipe, plate, section steel, spare parts, etc
HIC (Hydrogen Induced Cracking) is the result of a corrosive reaction between carbon steel and hydrogen sulphide. Wet hydrogen sulphide (H2S) cracking in steel has been a problem in petroleum refining and upstream oil and gas processing since the 1950s. Working conditions where wet H2S prevails are often described as sour service conditions and the term sour gas can be also be used in this context. As more fields rich in H2S are exploited, and this is increasingly the case, the problem is increasingly significant for equipment fabricated in potentially sensitive carbon-manganese (C-Mn) steels.
On the chemical composition of carbon steelIn general,HTC Steel requires strict control S,P Content,and to control Mn Content,to improve the performance of steel,you can add some trace elements.
producing HTC Use a lot of clean steel technology in steel, such as low carbon microalloyed technology, Ca Processing technology (change sulfide morphology, the spheroidizing) and Controlled rolling technology of controlled cooling.
On the chemical composition of carbon steel forgings：
Carbon steel forgings shall be vacuum degassing and normalizing or quenching and tempering treatment.And 100% UT inspection according to the SA – 388
HIC steel grade
|ASTM||A285||A285Gr.A(HIC) A285Gr.B(HIC) A285Gr.C(HIC)|
|DIN||EN10025 EN10028-3||S185(HIC) P235GH(HIC)|
|JIS||G3106||SM400A(HIC) SM400B(HIC) SM400C(HIC)|
|G3103||SB410(HIC) SB450(HIC) SB480(HIC)|
|G3118||SGV410(HIC) SGV450(HIC) SGV480(HIC)|