Introduction: Why Sour-Service Refineries Need Special Steel
In refineries and oil & gas plants, exposure to wet hydrogen sulfide (H₂S) creates highly corrosive conditions. Regular carbon steels often fail due to hydrogen-induced cracking (HIC) and sulfide stress cracking (SSC). To overcome this, engineers specify HIC tested plates with NACE MR0175 and MR0103 compliance, ensuring long-term reliability under sour-service environments.
Navgraha Steels Inc supplies a full range of SA 516 Grade 70 HIC Tested Plates meeting these global standards.
What is SA 516 Gr 70 HIC Tested Plate?
SA 516 Gr 70 is a high-strength, pressure-vessel-quality carbon steel widely used for boilers, heat exchangers, and refinery tanks.
When labeled HIC tested, it means the steel has undergone laboratory evaluation (as per NACE TM0284) to verify resistance to hydrogen cracking. The plates are manufactured with low sulfur content, clean microstructure, and controlled inclusions, making them suitable for H₂S-rich conditions.
Why NACE Compliance Matters (MR0175 & MR0103)
- NACE MR0175 / ISO 15156: Specifies material requirements for sour-gas production and downstream equipment.
- NACE MR0103: Governs steels used in refinery process units exposed to wet H₂S.
HIC tested SA 516 Gr 70 plates from Navgraha Steels Inc are compliant with both NACE standards, ensuring safety against hydrogen blistering and crack formation even under continuous exposure.
Difference Between HIC Tested and Ordinary Carbon Steel
| Property | Ordinary Carbon Steel | HIC Tested Steel |
| Hydrogen Resistance | Low | High |
| Sulfur/Inclusion Control | Standard | Ultra-Low Sulfur, Clean |
| Microstructure | Non-Uniform | Homogeneous Fine Grain |
| Test Standard | None | NACE TM0284, TM0177 |
| Usage | General Fabrication | Refineries, Sour-Gas Plants |
Testing Procedures and Standards Followed
Every plate supplied is tested as per:
- NACE TM0284 – Hydrogen Induced Cracking (HIC) Resistance
- NACE TM0177 – Sulfide Stress Cracking (SSC) Evaluation
- ASTM A516 / ASME SA516 – Mechanical Properties and Impact Tests
- Ultrasonic Examination (UT) – 100% for internal soundness
All reports are attached with Mill Test Certificates (MTC) confirming NACE MR0175 / MR0103 compliance.
Key Properties and Chemical Composition
- Carbon ≤ 0.27 %, Sulfur ≤ 0.002 %, Phosphorus ≤ 0.010 %
- Micro-clean structure with low inclusions and fine grain size
- High tensile strength (485 – 620 MPa)
- Excellent weldability and toughness even at low temperatures
Typical Applications
- Pressure vessels in refineries and petrochemical plants
- Amine absorption and H₂S scrubbing units
- Sour-gas pipelines and storage tanks
- Heat exchangers and hydrotreaters
- Offshore and onshore production facilities
Export Demand Across GCC, Africa & Europe
Navgraha Steels Inc exports NACE-compliant HIC plates to Saudi Arabia, UAE, Qatar, Oman, Kuwait, Egypt, Nigeria, and European refinery markets.
These regions mandate strict NACE certifications for new refinery installations and equipment maintenance.
Navgraha Steels Inc – Your Reliable NACE-Compliant Supplier
Our SA 516 Gr 70 HIC plates come from reputed mills such as SAIL, AMNS, JSPL, EVONITH, and other global manufacturers.
We ensure end-to-end traceability with IBR, PED, and ISO certifications for export.
Every order includes chemical analysis, mechanical tests, HIC & SSC test results, and NACE MR0175 / MR0103 statements.
Available Grades & Sizes
- Grades: SA 516 Gr 60, SA 516 Gr 70 (HIC Tested)
- Thickness: 6 mm – 100 mm
- Width: 1500 mm – 3000 mm
- Length: up to 12000 mm or as per project specification
Quality Certifications & Documents
- NACE MR0175 / MR0103 compliance certificate
- HIC & SSC test reports
- Mill Test Certificate (EN 10204 / 3.2 or 3.1)
- Ultrasonic inspection (100%)
- IBR & PED approval
Price Range of SA 516 Gr 70 HIC Plates
| Specification | Thickness (mm) | Price INR / Ton | Price USD / Ton |
| SA 516 Gr 70 HIC Tested | 8 – 50 | ₹ 120 000 – ₹ 180 000 | $ 1450 – $ 2150 |
| SA 516 Gr 70 + NACE MR0175 / MR0103 | 10 – 60 | ₹ 150 000 – ₹ 200 000 | $ 1750 – $ 2400 |
(Prices vary by origin, test requirement, and export destination.)
Conclusion: Choose Certified Material for Critical Use
In hydrogen service applications, there is no room for failure.
By selecting SA 516 Gr 70 HIC Tested Plates with NACE MR0175 / MR0103 compliance from Navgraha Steels Inc, you ensure superior safety, durability, and global project acceptance.
👉 Contact Navgraha Steels Inc today for datasheets, MTCs, and competitive quotes in both INR and USD.
