ASME SA612 is a high-strength, killed carbon-manganese-silicon steel specifically designed for medium- and low-temperature welded pressure vessels. As a material certified under the ASME Boiler and Pressure Vessel Code (BPVC), SA612 is widely used in engineering projects with high requirements for strength, thickness, and cost-effectiveness, where structural reliability and notch toughness are critical.
Primary Standards:
ASTM A612/A612M (American Society for Testing and Materials) – Standard Specification for Pressure Vessel Plates, Carbon Steel, Manganese-Silicon, High Strength, for Moderate and Lower Temperature Service
ASME SA612/SA612M (American Society of Mechanical Engineers) – Certified for pressure vessel applications
Supplementary Standards:
Ultrasonic Testing: Complies with ASTM A578 (Standard Practice for Straight-Beam Ultrasonic Examination of Steel Plates)
Surface Defect Treatment: Follows ASME SA-20M (Standard Specification for General Requirements for Steel Plates for Pressure Vessels)
ASME SA612 High-Strength Pressure Vessel Steel Plates
GNEE STEEL supplies ASME SA612 steel plates with consistent quality, complete documentation, and global export capabilities.
Below are present ASME SA612/ SA612M SA612 pressure vessel steel plate stocks.
| No. | Material Standard | Product Name | Thickness (mm) | Width (mm) | Length (mm) | Remarks |
|---|---|---|---|---|---|---|
| 1 | ASME SA612M | Pressure Vessel Steel Plate | 11 | 2300 | 7600 | |
| 2 | ASME SA612M | Pressure Vessel Steel Plate | 11 | 3000 | 11050 | |
| 3 | ASME SA612M | Pressure Vessel Steel Plate | 11 | 2300 | 7200 | |
| 4 | ASTM A612 | Pressure Vessel & Boiler Steel Plate | 11 | 2300 | 6580 | |
| 5 | ASTM A612 | Steel Plate | 11 | 2300 | 4460 | |
| 6 | ASTM A612 | Steel Plate | 11 | 2300 | 6500 | In Stock |
| 7 | ASTM A612 | Steel Plate | 11 | 2300 | 11800 | Custom Production |
| 8 | ASME SA612 | Pressure Vessel Steel Plate | 11 | 2300 | 4050 | |
| 9 | ASME SA612 | Steel Plate | 11 | 2300 | 12050 | |
| 10 | ASME SA612 | Steel Plate | 19 | 3000 | 6800 | Domestic Mill |
| 11 | ASME SA612 | Steel Plate | 12 | 2700 | 7000 | For Quotation |
| 12 | ASME SA612 | Steel Plate | 19 | 3000 | 6800 | Supplier Stock |
| 13 | ASME SA612 | Steel Plate | 11 | 2300 | 6130 | In Stock |
ASME SA612 and ASTM A612 high-strength pressure vessel steel plates are available in thicknesses from 11 mm to 19 mm, widths up to 3000 mm, and lengths up to 12050 mm. Stock plates, supplier inventory, and custom production services are available for boilers, pressure vessels, storage tanks, and industrial fabrication projects.
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What Is ASME SA612 Steel Plate?
ASME SA612 is the ASME-adopted version of ASTM A612, manufactured as killed, fine-grain carbon steel. It offers higher yield and tensile strength than conventional pressure vessel steels, enabling thinner plate designs under the same operating pressure.
Standard: ASME SA612 / ASTM A612
Steel Type: Carbon-manganese-silicon steel
Delivery Condition: As-rolled or Normalized
Application Code: ASME BPVC
Chemical Composition
| Element | Content Limit |
|---|---|
| C (Carbon) | ≤0.25% |
| Si (Silicon) | 0.15-0.50% |
| Mn (Manganese) | 1.00-1.50% |
| P (Phosphorus) | ≤0.035% |
| S (Sulfur) | ≤0.025% |
| Cu (Copper) | ≤0.35% |
| Ni (Nickel) | ≤0.25% |
| Cr (Chromium) | ≤0.25% |
| Mo (Molybdenum) | ≤0.08% |
| V (Vanadium) | ≤0.08% |
Requirements for tensile properties of SA612 steel plate:
| Thickness | ≤12.5mm | >12.5-25mm |
| Tensile strength |
83-105ksi(570-725MPa) |
81-101ksi(560-695MPa) |
| Yield strength (minimum) | 50ksi(345MPa) | 50ksi(345MPa) |
| 8in Elongation (minimum)% of (200mm) | 16 | 16 |
| 2in. Elongation (minimum)% of (50mm) | 22 | 22 |
Welding Performance Advantages of SA612 Steel Plates
SA612 is a fine-grained steel specifically designed for pressure vessels. Its carbon equivalent is strictly controlled during production, and the steel exhibits low hardenability, making it compatible with the full range of mainstream welding processes used for pressure vessels.
When welded in accordance with specifications, the mechanical properties and low-temperature impact properties of the welded joints meet ASME standards for non-destructive testing (UT/RT/MT) of pressure-retaining equipment, with no limitations on weldability.
Recommended Welding Methods
SMAW (Manual Metal Arc Welding)
SAW (Submerged Arc Welding)
FCAW (Flux-Cored Arc Welding)
GMAW (Solid Wire Gas Metal Arc Welding) (MAG/MIG)
Preheating Specifications by Plate Thickness (General Standards for Pressure Vessels)
Thickness < 25 mm: No preheating required at ambient temperatures above 5°C; when the ambient temperature is below 0°C, preheat to a minimum of 50°C to prevent brittle fracture due to rapid cooling.
Thickness 25–50 mm: Mandatory preheating to 50–100°C; heat uniformly within a 75 mm range on either side of the weld. During multi-pass welding, the interpass temperature must not fall below 50°C.
Thickness > 50 mm: Mandatory preheating to 100–150°C; use a heating blanket for uniform preheating of the entire section; maintain an interpass temperature of 100–200°C; if the temperature falls below the lower limit, reheat before continuing welding.
Additional Key Considerations for Welding
Control the upper limit of the interpass temperature at 250°C; excessively high temperatures can cause grain coarsening in the heat-affected zone, compromising the core advantage of SA612's fine-grained low-temperature impact toughness;
For equipment with a thickness of 32 mm or greater operating under low-temperature, high-pressure conditions, post-weld stress-relief heat treatment is recommended: hold at 590–650°C for 1 hour per 25 mm of thickness, followed by slow cooling with the furnace to eliminate residual welding stresses;
For thick plates 25 mm or greater, it is recommended to let the weld stand for 24 hours before performing MT/UT non-destructive testing to avoid missing delayed hydrogen-induced cold cracks.
ASME SA612 vs SA516 Grade 70 ：Higher Strength
| Grade | Minimum Yield Strength |
|---|---|
| SA516 Gr70 | 260 MPa |
| SA612 | 345 MPa |
SA612 features much higher minimum yield strength compared to common SA516 Gr70 carbon vessel plate, bringing multiple cost & structural advantages for pressure vessel manufacturers:
Higher allowable design stress Under identical design pressure, design temperature and vessel diameter, SA612 can bear higher allowable stress as per ASME VIII code. It meets high-pressure working requirements without oversize material selection.
Reduced plate thickness Thanks to its 345 MPa yield strength, designers can adopt thinner wall thickness for vessel shells and heads, while still satisfying safety strength standards. Thick heavy plates with expensive raw material and high processing cost can be avoided.
Lighter overall equipment weight Thinner steel plate largely cuts the dead weight of finished pressure vessels. It lowers transportation fees, lifting costs and foundation construction investment for end users.
Applications of ASME SA612 Pressure Vessel Steel Plates
1. Petroleum Industry: Manufacture of reactors, storage tanks (such as oil tanks and liquefied petroleum gas tanks), and other storage equipment
2. Chemical Industry: Key equipment such as heat exchangers, separators, and columns, as well as corrosion-resistant components
3. Power Generation Industry: Boilers and steam generators; high-pressure water pipes in hydroelectric power plants
4. Boiler Industry: Boiler drums, steam turbine casings, etc.
Choose ASME SA612 When All or Most Items Apply
1. The vessel requires higher structural yield strength for medium/high pressure design;
2. You need weight reduction for transportation, lifting or foundation construction;
3. Design calculation supports thinner wall thickness to save steel consumption;
4. Working environment involves medium or low temperature down to -40℃;
5. Equipment stores liquefied cryogenic media with combined pressure & cold service;
6. Long-term operation safety is prioritized over short-term raw material budget.
Contact us immediately for ASME SA612 stock availability
Please feel free to contact us at any time; our team will promptly answer all your questions.
Fully compliant with the ASTM A612/A612M standard, covering Grades 1, 2, and 3. Uniformly composed fully quenched and tempered steel; available in hot-rolled, normalized, and QT delivery conditions. Ample inventory ensures fast delivery. We offer one-stop processing services-including cutting, chamfering, and rolling-to help you save on processing costs.
Available Dimensions and Supply Range
| Item | Range |
|---|---|
| Thickness | 6-150 mm |
| Width | 1500-4000 mm |
| Length | 6000-18000 mm |
Gnee Steel provides a full range of processing services to deliver ready-to-use ASME SA612 steel plates for your specific application.
FAQ:
What thicknesses of ASME SA612 do you supply?
We supply ASME SA612 steel plate in thicknesses ranging from 6mm to 150mm. For special applications requiring non-standard thicknesses, we can often accommodate custom orders with minimum quantity requirements. Our technical team can help determine the optimal thickness for your specific application based on design pressure, vessel diameter, and other factors
Is SA612 easy to weld?
Yes, SA612 is much easier to weld than standard SA516 Gr70 especially for thick plates and high-pressure equipment. Its controlled low carbon equivalent minimizes hardening and cracking risks in heat-affected zones, requiring simpler welding procedures and lower preheat temperature. It is a preferred grade for manufacturers pursuing stable, high-efficiency vessel welding production.
What processing services do you offer for ASME SA612?
We provide comprehensive processing services for ASME SA612 steel plate, including CNC cutting, bending, rolling, beveling, and various surface treatments. Our state-of-the-art equipment and experienced technicians ensure precise processing to meet your exact specifications. We can deliver ready-to-weld components that reduce your production time and costs.
How long does it take to deliver ASME SA612 steel plates?
Delivery times for ASME SA612 steel plates depend on several factors including thickness, quantity, and required processing. Standard thicknesses in stock can be delivered within 3-5 business days. Custom orders or plates requiring extensive processing typically take 2-4 weeks. For urgent requirements, we offer expedited production and shipping options. Contact our sales team for a more accurate delivery estimate based on your specific needs