Navgraha Steels INC is a trusted supplier of SA 516 Gr.70 NACE Plates, Sheets & Coils, sourced from world-renowned mills such as SAIL, AMNS, JSPL, EVONITH, Nippon Yakin, Outokumpu, Special Metals, VDM, and ATI.
These plates are specially manufactured and tested for sour service environments, ensuring resistance to Hydrogen Induced Cracking (HIC) and Sulfide Stress Cracking (SSC) as per NACE MR0175 / MR0103 standards.
Engineered for refineries, petrochemical plants, pressure vessels, and boilers, SA 516 Gr.70 NACE combines high tensile strength, superior notch toughness, and exceptional weldability.
Each supply is accompanied by EN 10204 3.1/3.2 MTCs and third-party inspections (SGS, BV, TÜV, Lloyd’s, DNV) — ensuring 100% material traceability and buyer confidence.
In refinery and petrochemical projects, the biggest risk is audit rejection due to missing NACE compliance.
In refineries and petrochemical plants, one of the biggest risks is material rejection due to non-NACE compliance.
In sour gas service, the wrong coil supply can destroy both timelines and credibility.
SA 516 Grade 70 NACE is a pressure vessel quality carbon steel plate, normalized and HIC-tested for use in wet H₂S (sour gas) conditions.
It is developed to perform under corrosive refinery and offshore environments, where ordinary boiler-quality steel fails due to hydrogen embrittlement.
Key features include:
In short, it’s the refinery-grade evolution of standard SA 516 Gr.70 — built for longer service life and zero failure in corrosive environments.
Pressure vessels, reactors, heaters, columns
Separators, storage tanks, pipelines
Boilers, heat exchangers, economizers
Sour gas and seawater-exposed components
Absorbers, scrubbers, and reactors
| Property | Value | Description |
|---|---|---|
| Tensile Strength | 485–620 MPa | Maintains integrity under high pressure |
| Yield Strength | ≥ 260 MPa | Excellent load-bearing strength |
| Elongation | ≥ 17 % | Ductility under forming & welding |
| Impact Test (CVN) | –20°C | Assures notch toughness at low temperatures |
| Hardness | ≤ 200 HB | Maintains weldability & HIC resistance |
Designed to maintain strength, ductility, and resistance under hydrogen exposure
| Element | Typical % | Function |
|---|---|---|
| Carbon (C) | ≤ 0.27 | Provides strength |
| Manganese (Mn) | 0.85–1.20 | Improves ductility & toughness |
| Silicon (Si) | 0.13–0.45 | Aids in deoxidation |
| Phosphorus (P) | ≤ 0.015 | Controlled for HIC resistance |
| Sulfur (S) | ≤ 0.008 | Prevents sulfide cracking |
| Nickel (Ni) | ≤ 0.30 | Enhances impact toughness |
Strict control of sulfur and phosphorus ensures maximum resistance to HIC and SSC in sour gas conditions.
SA 516 Gr.70 NACE plates comply with:
Global Equivalents
Available Brands:
SAIL, AMNS, JSPL, EVONITH, Nippon Yakin, Outokumpu, Special Metals, VDM, ATI
Multi-mill sourcing ensures project flexibility, faster lead times, and global approvals from top EPC and refinery consultants.
| Parameter | Range | Remarks |
|---|---|---|
| Thickness | 6 mm – 150 mm | Normalized & HIC-tested |
| Width | 1,500 mm – 3,000 mm | Standard & custom sizes available |
| Length | 3,000 mm – 12,000 mm | Cut-to-size on request |
| Form | Plates / Sheets / Coils | HR & CR finish options |
Large stock range means fast supply during refinery shutdowns or emergency vessel repairs.
Ensures long service life under the most demanding sour-gas environments.
Reduces fabrication risk and ensures predictable weld performance for pressure vessel manufacturers.
Navgraha Steels INC combines engineering insight + supply reliability — a trusted partner for EPC contractors and refinery buyers.
Guaranteed compliance, reliability, and global acceptance for all refinery-grade projects.
Navgraha Steels INC exports SA 516 Gr.70 NACE Plates, Sheets & Coils to global refineries, EPC contractors, and oil & gas processors operating in sour-service environments.
Key Export Destinations:
Export Packing Includes:
Every consignment is export-ready, ensuring zero damage, zero rejection, and maximum compliance.
You should select SA 516 Gr.70 NACE when:
Designed for buyers who prioritize zero downtime, zero failure, and 100% compliance in refinery-grade materials.
Each plate, sheet, and coil is supplied with:
Buyers get full transparency & traceability from mill to shipment.
National Association of Corrosion Engineers – defining standards for sour-service steel.
ASTM A516 / ASME SA516 Grade 70 + NACE MR0175 / MR0103.
NACE plates are tested for HIC/SSC, ensuring suitability for hydrogen-rich environments.
Yes, all NACE plates are HIC & SSC tested per project specs.
6 mm – 150 mm.
Yes, they meet ASME Section VIII requirements for pressure vessels & boilers.
Yes, dual-certified NACE plates are available for multi-code projects.
Yes, through SGS, BV, TÜV, DNV, or Lloyd’s.
Yes, regularly to UAE, Saudi Arabia, Oman, Qatar, Nigeria, and Egypt.
≤ 200 HB, ensuring weldability & sour service performance.
Yes, typically at –20°C or as per project requirement.
Stock plates – 2 to 3 days; mill orders – 3 to 6 weeks.
Yes, 3.1 / 3.2 certified material is available with third-party witness.
Depends on thickness, origin, and certification – request a quote for latest rate.
Navgraha Steels INC offers:
