What is ASME SA387GR.22L HIC NACE equivalent to？

 

 

What is ASME SA387GR.22L HIC NACE equivalent to?

At Gangsteel, we manufacture and supply ASME SA387 Grade 22L HIC NACE steel plates (also known as SA387GR22L HIC or SA387 Gr.22L HIC NACE). This is a low-carbon 2.25Cr-1Mo alloy steel specially processed for Hydrogen Induced Cracking (HIC) resistance and full compliance with sour service standards.

 

Equivalent Grades of ASME SA387 Grade 22L HIC NACE

Standard	Equivalent Grade	Notes
ASME / ASTM	SA387 Gr.22L Class 1 or Class 2 / A387 Gr.22L	Primary standard
UNS	K21590(Low Carbon version)	Unified Numbering System
EN / DIN	10CrMo9-10/ 1.7380	European equivalent
BS EN	10CrMo9-10	British / European standard
JIS	SCMV4	Japanese approximation
GB (China)	12Cr2Mo1R	Chinese national standard

 

Important Notes from Gangsteel

ASME SA387 Grade 22L HIC NACEis the low-carbon version of Grade 22, which provides better weldability and toughness than standard SA387 Gr.22, while still offering good creep resistance up to 550°C.

To meet HIC + NACE requirements, we apply:

• Ultra-low sulfur (S ≤ 0.002%) and phosphorus control
• Inclusion shape control (ISC)
• Special normalizing + tempering heat treatment
• 100% HIC testing according to NACE TM0284 (CLR ≤15%, CTR ≤5%, CSR ≤2%)
• Full compliance with NACE MR0175 / ISO 15156 for sour (wet H₂S) service

This makes SA387GR22L HIC NACE particularly suitable for wet H₂S environments in refineries, gas processing plants, and pressure vessels where both hydrogen cracking resistance and good weldability are critical.

Gangsteel Supply AdvantageWe can deliver SA387GR22L HIC NACE plates with:

• Thickness: 6mm – 150mm
• Full EN 10204 3.1 / 3.2 certification
• Complete HIC test reports
• Ultrasonic testing (UT) records

If you are looking for the material equivalent to K21590 with HIC and NACE requirements, Gangsteel is your trusted supplier.

Would you like a quotation, detailed technical data sheet, or HIC test sample for ASME SA387 Grade 22L HIC NACE? Feel free to contact us — we usually reply within 12 hours.