Nandini Steel is a trusted ASME SA 516 Grade 70 (NACE + HIC) plate supplier and stockist in Mumbai, India, with over two decades of industry experience. We supply SA-516 Gr 70 pressure vessel plate fully compliant with NACE MR0175 / ISO 15156 for sour service environments, with HIC testing per NACE TM0284. This carbon-manganese plate contains 0.27% to 0.31% (varies with thickness) carbon, 0.85 to 1.20% manganese, and 0.15 to 0.40% silicon. For NACE/HIC service, we stock plates with restricted sulphur at 0.003% max and phosphorus at 0.015% max.
SA-516 Gr 70 plate offers tensile strength of 485 to 620 MPa (70 to 90 ksi) and minimum yield strength of 260 MPa (38 ksi). All NACE/HIC sour service plates are supplied in normalised condition with mandatory HIC testing per NACE TM0284. Thicknesses range from 6 mm to 200 mm, widths 1,000 mm to 3,500 mm, and lengths 2,000 mm to 12,000 mm; custom sizes available. Oil and gas, refinery, petrochemical, and power generation industries specify this A516 Gr 70 NACE HIC plate for sour service pressure vessels. We are ISO 9001 certified and supply all plates with EN 10204 3.1 Mill Test Certificates and separate HIC test reports.
ASME SA 516 Gr 70 (NACE + HIC) Plate Specifications
The specifications of the Grade 70 NACE HIC plate, including standard, dimensions, and condition, are listed in the table below.
| Parameter | Details |
| Standard | ASME SA-516 / ASTM A516 |
| Thickness | 6 mm to 200 mm |
| Width | 1,000 mm to 3,500 mm |
| Length | 2,000 mm to 12,000 mm; custom lengths available |
| Form | Hot Rolled |
| Edge | Mill Edge, Slit Edge |
| Surface Condition | Mill Scale (as standard); Shot-Blasted, Pickled, or Primer-Coated on request |
| Heat Treatment Condition | Normalised (mandatory for NACE/HIC service) |
| HIC Test Standard | NACE TM0284 (Solution A) |
| Sour Service Compliance | NACE MR0175 / ISO 15156 |
ASME SA 516 Grade 70 Chemical Composition
Chemical composition per ASTM A516/A516M, with additional NACE/HIC service restrictions.
| Element | C | Mn | P | S | Si | CE |
| A516 Gr 70 | 0.27 max* | 0.85 to 1.20 | 0.025 max | 0.025 max | 0.15 to 0.40 | — |
| NACE/HIC Service | 0.27 max* | 0.85 to 1.20 | 0.015 max | 0.003 max | 0.15 to 0.40 | 0.43 max |
*Carbon (max) varies by thickness: ≤12.5 mm = 0.27% | >12.5-50 mm = 0.28% | >50-100 mm = 0.30% | >100-200 mm = 0.31% per ASTM A516-22
CE (IIW formula): CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15
ASME SA-516 Gr 70 Mechanical Properties
| Property | Metric | Imperial |
| Tensile Strength | 485 to 620 MPa | 70 to 90 ksi |
| Yield Strength (min) | 260 MPa | 38 ksi |
| Elongation (min, 50 mm / 2 in. gauge) | 21% | 21% |
| Hardness (NACE MR0175 limit for sour service) | 22 HRC max (≈ 248 HV max / ≈ 235 HBW max) | |
ASME SA516 Gr 70 Equivalent Grades & Designations
International designations equivalent to ASTM A516 Grade 70 are listed below.
| Country / Standard | Designation |
| USA (UNS) | UNS K02700 |
| Europe (EN 10028-2) | P355GH |
| Europe (W.Nr) | 1.0473 |
| Japan (JIS G3118) | SGV480 |
| China (GB 713) | Q345R |
| UK (BS, superseded) | BS 1501-224-490B |
| Germany (DIN, superseded) | DIN 17155 19Mn6 |
ASME SA 516 Gr 70 NACE HIC Plate Industrial Applications
A516 Grade 70 NACE HIC plate serves industries where sour service conditions demand material compliance.
Oil & Gas Processing
A516 Gr 70 sour service plate is used for separators, slug catchers, and gas sweetening vessels in upstream operations.
Refinery & Petrochemical Equipment
SA-516 Gr 70 NACE MR0175 plates serve hydrocracker reactors, amine towers, and sour water stripper columns.
Chemical & Fertiliser Plants
This plate grade is selected for ammonia converters, urea reactors, and acid gas storage vessels.
Power Generation & Boiler Systems
A516 Gr 70 NACE HIC plate is used for high-pressure feedwater heaters, FGD vessels, and steam drums in coal-fired plants where sulphur-bearing flue gas exposure creates wet H₂S conditions.
Impact Testing for NACE / HIC Applications
Charpy V-notch impact testing is typically specified for low-temperature pressure vessel service. Normalised SA-516 Gr. 70N plate is supplied with impact testing per ASME Section VIII project requirements when specified. HIC testing per NACE TM0284 (Solution A: 5% NaCl + 0.5% acetic acid, saturated with H₂S) is mandatory. Acceptance criteria per end-user specifications: CLR ≤ 15%, CTR ≤ 5%, CSR ≤ 2%.
Distributor of the Following Manufacturers
We supply A516 Gr 70 NACE HIC plate from the following globally recognised mills.
TATA Steel
ArcelorMittal Industeel
Nandini Steel supplies A516 Gr 70 NACE HIC plate across Mumbai, Delhi, Chennai, Kolkata, Bengaluru, Hyderabad, Pune, Ahmedabad and other cities. Standard sizes ship within 3 to 5 working days.
| Mumbai (Maharashtra) | Delhi | Bengaluru (Karnataka) | Chennai (Tamil Nadu) |
| Kolkata (West Bengal) | Hyderabad (Telangana) | Ahmedabad (Gujarat) | Pune (Maharashtra) |
| Jaipur (Rajasthan) | Surat (Gujarat) | Chandigarh | Lucknow (Uttar Pradesh) |
| Indore (Madhya Pradesh) | Coimbatore (Tamil Nadu) | Kochi (Kerala) | Visakhapatnam (Andhra Pradesh) |
| Nagpur (Maharashtra) | Patna (Bihar) | Bhopal (Madhya Pradesh) | Vadodara (Gujarat) |
| Mysuru (Karnataka) | Thane (Maharashtra) | Rajkot (Gujarat) | Vijayawada (Andhra Pradesh) |
| Agra (Uttar Pradesh) | Nashik (Maharashtra) | Guwahati (Assam) | Kanpur (Uttar Pradesh) |
| Faridabad (Haryana) | Gurugram (Haryana) | Noida (Uttar Pradesh) | Shimla (Himachal Pradesh) |
| Raipur (Chhattisgarh) | Udaipur (Rajasthan) | Bhubaneswar (Odisha) | Dehradun (Uttarakhand) |
| Ranchi (Jharkhand) | Jamshedpur (Jharkhand) | Chandrapur (Maharashtra) | Dhanbad (Jharkhand) |
| Aligarh (Uttar Pradesh) | Aurangabad (Maharashtra) | Tiruchirappalli (Tamil Nadu) | Srinagar (Jammu & Kashmir) |
| Ludhiana (Punjab) | Warangal (Telangana) | Bikaner (Rajasthan) | Panaji (Goa) |
| Guntur |
Global Supply
We export A516 Gr 70 NACE HIC Plates across the Middle East, Southeast Asia, Africa, Europe, and North America. All shipments include mill test certificates and NACE/HIC test reports.
| Region | Countries | |||||
| Middle East | Oman, Kuwait, Turkey, Yemen, Syria, Jordan, Cyprus, Saudi Arabia, Iran, Iraq, UAE, Qatar, Bahrain | |||||
| Africa | South Africa, Libya, Egypt, Sudan, Gabon, Nigeria, Algeria, Angola, Equatorial Guinea, The Republic Of Congo | |||||
| North America | Costa Rica, Puerto Rico, Trinidad And Tobago, Jamaica, Bahamas, USA, Canada, Mexico, Panama | |||||
| Europe | Netherlands, Belgium, Greece, Portugal, Hungary, Denmark, Russia, Norway, Germany, France, Italy, UK, Spain, Ukraine, Croatia, Slovenia, Malta, Albania, Austria, Switzerland, Slovakia, Finland, Ireland, Czech Republic | |||||
| Asia | India, Japan, Sri Lanka, Maldives, Bangladesh, Myanmar, Taiwan, Cambodia, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea | |||||
| South America | Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, Argentina, Bolivia, Brazil, Chile | |||||
Frequently Asked Questions
What is the price of ASME SA 516 Gr 70 NACE HIC Plate per kg?
SA 516 Gr 70 NACE HIC plate costs approximately ₹85 to ₹130 per kg in India and $1.08 to $1.80 per kg internationally. Contact us for a current quote.
What is the difference between ASME SA 516 Gr 70 and SA 516 Gr 70N?
The “N” suffix indicates normalised heat treatment. Manufacturers heat SA516-70N plate above austenitising temperature and air-cool it to refine grain structure for increased low-temperature toughness.
What are the additional chemistry restrictions for ASME SA 516 Gr 70 NACE HIC Plate?
Sulphur is restricted to 0.003% max, phosphorus to 0.015% max, and carbon equivalent to 0.43 max for NACE/HIC service. Standard A516 allows 0.025% max for both S and P per ASTM A516-22.
What is the HIC acceptance criteria for ASME SA 516 Gr 70 NACE TM0284 testing?
HIC test results must satisfy: CLR 15% max, CTR 5% max, CSR 2% max. Some end-users specify tighter limits.
What is the carbon equivalent formula for ASME SA 516 Gr 70 NACE HIC Plate?
The IIW formula applies: CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15, capped at 0.43 for NACE/HIC service.
How to verify NACE MR0175 compliance on an ASME SA 516 Gr 70 Plate MTC?
Confirm chemistry meets NACE limits (S ≤ 0.003%, P ≤ 0.015%, CE ≤ 0.43), plate is normalised, HIC results are within limits, and hardness is max 22 HRC.
