ASTM A612/A612M Pressure Vessel Plate For The Oil Industry

Gnee Steel (Tianjin) Co., Ltd. is one of the most professional astm a612/a612m pressure vessel plate for the oil industry manufacturers and suppliers in China. Welcome to wholesale customized astm a612/a612m pressure vessel plate for the oil industry at competitive price from our factory. Good service and quality products are available.

Pressure Vessel Steel provides premium quality carbon steel plate for boiler and pressure vessel fabrication which is perfectly suited to the high standards set by the oil, gas, and petrochemical equipment, GNEE stocks a wide range of dimensions of ASTM A612/A612M.

We provide official MTC material certificates and can arrange independent SGS third-party testing for all ASTM A612 steel plates.

Carbon (C): ≤0.29% – Controls carbon equivalent to ensure weldability;

Manganese (Mn): 0.92%–1.62% – Improves hardenability and refines grain size;

Silicon (Si): 0.13%–0.55% – Enhances deoxidation;

Phosphorus (P), Sulfur (S): ≤0.025% each – Reduces the risk of segregation and cold brittleness;

Molybdenum (Mo): ≤0.09% – Improves high-temperature strength and creep resistance;

Note A: For each reduction of 0.01 percentage point below the specified carbon maximum, an increase of 0.06 percentage point manganese above the specified maximum is permitted up to a maximum of 1.65 % for heat analysis (1.70 % for product analysis).

Note B: Applies to both heat and product analyses.

Note C: When analysis shows that the amount of an element is 0.02 % or lower, the value may be reported as≤0.02 %.

A Determined by either the 0.2% offset method or the 0.5% extension-under-load method.

B See Specification A20/A20M for elongation adjustments.

Under normalized and tempered delivery condition, the steel maintains Charpy impact energy ≥27 J at -40°C over full plate thickness. It avoids brittle failure in LPG, small LNG tanks and offshore low-temperature separation equipment, which general structural steel cannot satisfy.

Its minimum yield strength of 345 MPa is higher than conventional boiler plate. Thinner wall design reduces equipment weight, cutting raw material, processing and ocean transportation costs for reactors, spherical tanks and refinery storage vessels.

Strict restriction on sulfur and phosphorus forms uniform fine grain structure. It withstands hydrogen-rich working media in hydrogenation, catalytic reforming and alkylation units and lowers the risk of hydrogen induced cracking (HIC).

Controlled carbon equivalent fits flame, plasma, laser cutting and various welding bevel machining. It meets mass fabrication demands of tube sheets, heat exchanger shells and reaction equipment in refineries.

1.Refinery reaction equipment.

ASTM A612/A612M is used for shells, heads and tube sheets of catalytic reforming, hydrotreating and alkylation reactors. This steel grade fits medium reactors for ethylene and alumina plants, as well as lined anti-corrosion reaction shells for non-extreme high-temperature media. Stable weldability of ASTM A612 supports batch manufacturing of petrochemical reaction devices.

2.Oil and gas separation equipment.

Shells and heads of three-phase separators, absorption towers, flash drums and buffer knockout drums are commonly fabricated from ASTM A612/A612M. Uniform mechanical properties help the equipment withstand cyclic working pressure in separation processes.

3.Cryogenic liquefied gas storage tanks and spheres.

ASTM A612/A612M delivers reliable toughness at -40°C, making it suitable for aboveground and underground LPG tanks, small spherical tanks, gas regulator cylinder groups and low-pressure LNG storage vessels working at -20°C to -40°C. It is also applied to pressure vessels for liquid propane and butane storage.

4.Heat exchange equipment

Manufacturers select ASTM A612/A612M for shells, tube sheets and channel boxes of shell-and-tube heat exchangers, medium-pressure water/oil cooling exchangers and low-pressure pressure housings for waste heat recovery.

5.Crude oil and intermediate product storage vessels

ASTM A612/A612M serves medium-pressure storage tanks, buffer drums and reflux drums storing naphtha, condensate and light crude oil in refineries.

6.Offshore oil & gas facility modules

Small pressure skids for FPSO topside modules, platform buffer vessels and low-temperature separation equipment for offshore cold environments adopt ASTM A612/A612M.

ASTM A612 Pressure vessel plate for storage tanks

Standardized heat treatment

All ASTM A612 plates are delivered in normalized & tempered condition, with stable -40℃ impact toughness fully complying with ASTM requirements.

Complete ready stock

Wide range of standard sizes are kept in stock for same-day shipment. Non-standard thicknesses support custom production with fixed lead time.

Full processing support

We provide cutting, beveling, surface blasting, UT/MT/PT inspection and permanent marking services to meet one-stop fabrication demands.

Strict surface & dimensional control

Plates follow ASTM A20/A20M surface rules with precise dimensional tolerance, rejecting defects such as cracks and laminations.

FAQ:

What is SA 612 material?

ASME SA612 (equivalent to ASTM A612) is a high-strength, killed carbon-manganese-silicon steel. It is specifically designed for welded pressure vessels and boilers operating in moderate to lower temperatures, making it a popular choice in the oil, gas, and LNG industries.

What is A612 steel?

A612 steel plate is the standard specification for pressure vessel plates that are high strength, carbon steel for moderate and lower temperature use.

What is the difference between ASTM A612 and ASME SA612?

ASTM A612/A612M is the material standard issued by ASTM, while ASME SA612/SA612M reproduces its full technical data for ASME pressure vessel codes. Their chemical composition and mechanical properties are identical and interchangeable; SA612 is required for ASME-stamped oil & gas equipment, and A612 applies to general low-temperature vessels.

What is the equivalent of ASTM A612 steel?

ASME SA612 is the direct ASME code equivalent of ASTM A612/A612M with identical chemical and mechanical properties. Cross-standard functional equivalents:

• US standard: SA516 Gr.70 (lower yield strength, weaker -40℃ low-temperature toughness)
• European EN: P355N (comparable strength, only -20℃ impact qualified)
• Chinese GB: Q345R (same yield strength, standard impact test at -20℃)
• Japanese JIS: SPV355 for general pressure vessel substitution.

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