What is ASME SA387GR.911 HIC NACE equivalent to?

What is ASME SA387GR.911 HIC NACE equivalent to?

At Gangsteel, we specialize in manufacturing and supplying ASME SA387 Grade 91 HIC NACE steel plates (also written as SA387GR91 or SA387 Gr.91 HIC). This is a high-performance 9Cr-1Mo-V-Nb modified alloy steel designed for demanding high-temperature and sour service environments.

Equivalent Grades of ASME SA387 Grade 91 HIC NACE

Here are the most commonly recognized equivalents:

Important Notes from Gangsteel

• SA387 Grade 91 HIC NACEis based on the standard ASME SA387 / ASTM A387 Grade 91 Class 2, but with additional strict processing: ultra-low sulfur and phosphorus control, inclusion shape control, and special heat treatment to achieve excellent Hydrogen Induced Cracking (HIC) resistance.
• It fully complies with NACE MR0175 / ISO 15156 for sour (wet H₂S) service applications.
• This grade is widely used in supercritical and ultra-supercritical power plants, high-temperature steam pipelines, headers, and pressure vessels in hydrogen-rich environments.

Gangsteel’s AdvantageAs a direct mill supplier, we can produce and supply SA387GR91 HIC NACE plates with:

• Full EN 10204 3.1 / 3.2 certification
• 100% HIC testing according to NACE TM0284 (CLR ≤15%, CTR ≤5%, CSR ≤2%)
• 100% Ultrasonic Testing (UT)
• Customized thickness from 6mm to 150mm

If you are looking for ASME SA387 Grade 91 HIC NACE steel plates or need the material equivalent to K90901 / 10CrMoVNb9-1, Gangsteel can provide competitive pricing, reliable delivery, and complete technical support.

Need a quote or technical data sheet?Feel free to contact us — we usually reply within 12 hours with full mill test certificates and HIC test reports.