ASTM A516 GR 70 (ASTM A516GR70N) Carbon Steel Plates

ASTM A516 Grade 70, also known as ASTM A516GR70N or ASTM A516 GR 70, is a high-strength carbon steel plate designed for moderate and lower temperature service in pressure vessels, boilers, and storage tanks.
ASTM A516GR70N N is delivery station,meaning  normalized situation.
This grade offers excellent tensile strength of 485-620 MPa and yield strength of 260 MPa, making it suitable for applications requiring robustness under high pressure (up to 500 bar) and elevated temperatures (up to 450°C). SHH STEEL, a leading carbon steel exporter, supplies these plates in thicknesses from 5mm to 500mm, with widths up to 4600mm and lengths to 12000mm, ensuring versatility for large-scale industrial projects.

The material’s fine grain structure, achieved through normalizing heat treatment, enhances toughness and ductility, preventing brittle failure in demanding environments. ASTM A 516 GR 70 is widely used in oil & gas, petrochemical, and power generation sectors due to its compliance with ASME Section VIII Division 1, which governs the design and fabrication of pressure-containing equipment. SHH STEEL’s ASTM A516 GR.70 plates are rigorously tested for impact resistance (27J at -20°C per ASTM E23) and ultrasonic inspection (per ASTM A435) to detect laminations, guaranteeing defect-free performance.

For buyers searching for ASTM A516 Gr.70 properties or equivalents, this grade stands out for its cost-effectiveness compared to higher-alloy steels, offering a balanced CE (Carbon Equivalent ≤0.42 per AWS D1.1) for superior weldability. SHH STEEL provides custom fabrication options, including cutting and bending, to meet specific project requirements, making it a go-to choice for global engineers

The material specification for ASTM A516 Grade 70 Normalized carbon steel plates is outlined in ASTM A516/A516M-17, a standard for carbon steel plates intended for pressure vessel service at moderate and lower temperatures. This specification, compliant with ASME Section II Part A (SA-516 Gr.70), defines requirements for chemical composition, mechanical properties, and testing protocols, ensuring the plates are suitable for welded pressure vessels up to 450°C. SHH STEEL adheres to this standard, offering plates with dual certification for international use, including EN 10028-2 for European projects.

The specification mandates normalizing for thicknesses over 40mm to refine grain structure, with options for stress relief to reduce residual stresses. Plates are supplied with mill test certificates (MTCs per EN 10204 3.1), verifying compliance with ASME Section VIII Division 1 for pressure-containing equipment. SHH STEEL’s ASTM A516 GR 70 plates support supplementary requirements like vacuum degassing for low hydrogen content, enhancing their suitability for sour service (NACE MR0175). For custom dimensions, we provide widths up to 4600mm and lengths to 12000mm, ensuring flexibility for large vessel designs. Buyers can visit our ASTM A516/A516M steel plate page for more details.

Global equivalents for ASTM A516 Gr.70 facilitate international projects, offering similar tensile and yield properties for pressure vessel use.

Insights: P355GH (EN 10028-2) offers higher yield (355 MPa) for EU boilers, Q345R (GB/T 713) provides cost-effective 345 MPa for China, and A537 Cl.1 (ASTM A537) enhances impact (41J) for critical uses.

Supplementary requirements for ASTM A516 GR 70 carbon steel plates enhance performance for specialized applications, offering buyers tailored options. These include ultrasonic testing (Class 1 per ASTM A435 for no laminations >0.25% thickness), Charpy impact at -50°C (27J min per ASTM A20 for cold service), and heat analysis per heat number (ASTM E350 for traceability). Product analysis allows ±0.02% tolerance on elements, while shot blasting to Sa 2.5 (50-100μm profile per ISO 8501-1) is available for surface preparation. SHH STEEL provides these to meet stringent needs, as buyers search for “A516 Gr.70 supplementary requirements.”

ASTM A516 GR 70 carbon steel plates are versatile for high-pressure and temperature environments, with excellent strength and toughness.

Details: Pressure vessels benefit from 485-620 MPa tensile at 450°C, while boilers handle 400°C with 17% elongation for forming. Storage tanks use 6-30mm plates for 50 bar, and oil & gas equipment leverages 30-120mm for 400 bar with NACE compliance.

Delivery conditions for ASTM A516 GR 70 carbon steel plates define their mechanical state, impacting suitability for pressure vessel fabrication. SHH STEEL supplies plates in as-rolled, normalized (900-950°C), or stress-relieved (620-650°C) conditions per ASTM A20/A20M, with quenched and tempered options for enhanced toughness. Normalized plates, air-cooled after heating, refine grain for improved impact resistance in boilers up to 450°C. Stress-relieved reduce residual stresses for welded structures, while quenched and tempered (870-900°C quench, 650°C temper) suit wear applications. Heat numbers ensure traceability, with SHH STEEL offering rapid global transit.

ASTM A516 Grade 70 is compared horizontally with equivalents and alternatives to highlight its strengths for pressure vessel applications, providing buyers with actionable insights for global projects.

Analysis: A516 Gr.70’s 260 MPa yield is lower than P355GH’s 355 MPa, but its 5-500mm thickness range suits thicker U.S. vessels, while P355GH’s 250mm fits EU boilers. SPV355 and Q345R offer 34J impact for Asian toughness needs, with Q345R’s 0.95 cost index appealing to China. A537 Cl.1’s 41J impact is ideal for critical applications, though 15% costlier. A285 Gr.C’s 26% elongation is cheaper but limited to 50mm, lacking impact data, per ASME Section VIII. SHH STEEL recommends A516 for cost-effective U.S. projects, P355GH for EU high-yield needs, and Q345R for Asian markets.

Tolerances for ASTM A516 GR 70 carbon steel plates ensure dimensional accuracy, critical for pressure vessel and boiler fabrication to avoid misalignment. SHH STEEL adheres to ASTM A6/A6M, with ±1.5mm thickness tolerance for plates under 40mm and ±2.0mm for thicker sections up to 200mm (custom 300mm). Width and length tolerances are ±10mm standard, with ±5mm for precision orders up to 4600mm width and 12000mm length. Surface flatness is 3mm per meter, per ASTM A6, preventing warping. For European projects, EN 10029 Class B tolerances are offered, enhancing compatibility.

ASTM A516 GR 70 carbon steel plates offer excellent weldability due to low carbon (≤0.27%) and CE ≤0.42 per AWS D1.1. SHH STEEL recommends preheating at 150-200°C for thicknesses >25mm to prevent cracking, with PWHT at 620-650°C for stress relief. Processes like GTAW, SMAW, and GMAW are supported with E7018 filler (AWS A5.1), achieving 90-95% joint efficiency per ASME Section IX. Low sulfur (≤0.035%) reduces hot shortness, and 17% elongation ensures ductility. Testing includes bend tests (ASTM E190) for 3t radius and ultrasonic for weld integrity per ASTM A435.

SHH STEEL offers ASME and ASTM-certified A516 Gr.70 plates, with custom thicknesses up to 300mm and heat treatments tailored to your project. Our 15-year track record includes zero defect deliveries to 50+ countries, backed by SGS verification and mill test certificates.

SHH STEEL’s ASTM A516 Gr.70,ASTM A516 Grade 70 Carbon Steel Plates offer superior strength, weldability, and versatility for pressure vessels and boilers. With precise tolerances, comprehensive testing, and global equivalents, we deliver tailored, high-quality solutions. Contact SHH STEEL for your steel needs. More Products for astm a 516 gr 55 , astm a 516 gr 60, astm a 516 gr 65