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A516 | Pressure Vessel Steel

A516 Pressure Vessel Steel plate Thickness: 6-100 mm Width: 900-4800 mm Length: 3000-25000 mm
A large number of A516 Steel plates are neatly stored in the warehouse.

A516 | Pressure Vessel Steel

A516 is a carbon steel under ASTM standards for pressure vessels and boilers. It is designed for moderate- and low-temperature services, offering high strength and weldability. Equivalent grades include SB450 (JIS), P265GH (EN), and Q345R (GB). A516 is widely used in oil and gas equipment, power plants, chemical tanks, and storage vessels due to its toughness and ductility. Common grades like ASTM A516 Grade 70 are popular for their balance of strength and performance.

We offer A516 Gr.55/60/65/70 steel in sizes ranging from 3000mm to 25000mm in length, 900mm to 4800mm in width, and 6mm to 150mm in thickness.

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Description

What is A516?

ASTM A516 is a low-alloy carbon steel made of about 98% iron with carbon, manganese, phosphorus, and sulfur. It is hot-rolled into solid plates and used for pressure vessels and boilers due to its strength, weldability, and low-temperature toughness. Available in Grades 55, 60, 65, and 70, it provides varying levels of performance to meet specific needs in industries like oil storage, chemical processing, and power generation.

Characteristics of A516 Steel

A516 steel offers excellent ductility, high strength, and toughness, performing well under low temperatures. It is widely used in pressure vessels, boilers, and oil storage tanks. However, due to its density, it may be relatively heavier. For projects requiring lighter materials, alternatives like A737 and P420M offer lower weight while maintaining similar strength and toughness. Other suitable substitutes include SB450, P355NH, and P460M, which provide good mechanical properties and enhanced performance for specific applications.

Chemical Compositions

ElementGrade 55 (%)Grade 60 (%)Grade 65 (%)Grade 70 (%)
Carbon, C0.17 – 0.240.17 – 0.260.17 – 0.280.17 – 0.30
Manganese, Mn0.85 – 1.200.85 – 1.200.85 – 1.200.85 – 1.20
Phosphorus, P≤ 0.035≤ 0.035≤ 0.035≤ 0.035
Sulfur, S≤ 0.035≤ 0.035≤ 0.035≤ 0.035
Silicon, Si0.13 – 0.450.13 – 0.450.13 – 0.450.13 – 0.45
Copper, Cu (optional)≤ 0.35≤ 0.35≤ 0.35≤ 0.35
Nickel, Ni (optional)≤ 0.40≤ 0.40≤ 0.40≤ 0.40

The higher the grade of A516 steel, the higher its carbon content.

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Physical Properties

PropertyGrade 55/60/65/70
Density7.85 g/cm³ | 0.284 lb/in³
Melting Point1450°C | 2642°F
Boiling Point2870°C | 5200°F
Thermal Conductivity50 W/m·K | 34.5 BTU·in/(hr·ft²·°F)
Electrical Conductivity1.2 × 10⁶ S/m | 0.12 × 10⁶ S/m
Specific Heat Capacity0.49 J/g·K | 0.12 BTU/lb·°F
Thermal Expansion Coefficient11 × 10⁻⁶ /K | 6.1 × 10⁻⁶ /°F
Electrical Resistivity0.008 Ω·m | 0.000012 Ω·ft
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Mechanical Properties

PropertyGrade 55Grade 60Grade 65Grade 70
Tensile Strength380-515 MPa | 55-75 ksi415-550 MPa | 60-80 ksi450-585 MPa | 65-85 ksi485-620 MPa | 70-90 ksi
Yield Strength220 MPa | 32 ksi240 MPa | 35 ksi260 MPa | 38 ksi275 MPa | 40 ksi
Brinell Hardness110-140 HB120-150 HB130-160 HB135-170 HB
Rockwell Hardness70-80 HRB75-85 HRB80-90 HRB85-95 HRB
Vickers Hardness120-160 HV130-170 HV140-180 HV150-190 HV
Elongation21%21%20%18%
Elastic Modulus210 GPa | 30,500 ksi210 GPa | 30,500 ksi210 GPa | 30,500 ksi210 GPa | 30,500 ksi

Data After QT(Quenching and Tempering) Processing

 

PropertyGrade 55 QTGrade 60 QTGrade 65 QTGrade 70 QT
Tensile Strength550-650 MPa | 80-95 ksi585-690 MPa | 85-100 ksi620-720 MPa | 90-105 ksi650-760 MPa | 95-110 ksi
Yield Strength345 MPa | 50 ksi380 MPa | 55 ksi415 MPa | 60 ksi450 MPa | 65 ksi
Brinell Hardness200-230 HB210-240 HB220-250 HB230-260 HB
Rockwell Hardness90-100 HRB95-105 HRB100-110 HRB105-115 HRB
Vickers Hardness210-240 HV220-250 HV230-260 HV240-270 HV
Elongation18%17%16%15%
Elastic Modulus210 GPa | 30,500 ksi210 GPa | 30,500 ksi210 GPa | 30,500 ksi210 GPa | 30,500 ksi

Industries & Applications

IndustriesProducts
Pressure VesselsStorage tanks, pressure drums, reactor vessels, separators, heat exchangers
Power GenerationBoilers, steam drums, piping systems, turbine casings, condensers
Oil and GasOil storage tanks, process separators, refinery columns, pressure piping, offshore equipment
Chemical ProcessingReactors, heat exchangers, distillation columns, storage tanks, mixing vessels
PetrochemicalCrude oil distillation towers, cracking units, fractionation columns, reactors, boilers
LNG StorageLNG tanks, piping systems, compressors, containment vessels, cryogenic storage systems
Industrial MachineryPressure chambers, hydraulic presses, mechanical components, heavy machinery, heat exchangers
Food and BeverageProcessing tanks, fermentation vessels, storage containers, heat treatment equipment, pressure cookers

Machining

A516 Heat Treatment

  1. Normalizing: Heat to 900°C – 950°C (1650°F – 1740°F) and air cool.
    • Effect: Refines grain size, improves ductility and toughness, and prepares the steel for further processing.
  2. Stress Relieving: Heat to 540°C – 650°C (1000°F – 1200°F) and cool in air.
    • Effect: Reduces residual stress from welding or forming.
  3. Quenching and Tempering: Heat to 800°C – 900°C (1470°F – 1650°F), quench in water or oil, then temper at 600°C – 700°C (1110°F – 1290°F).
    • Effect: Increases strength and hardness while improving toughness.

A516 Surface Finish

  1. Shot Blasting: Removes surface impurities and prepares for coating or painting.
  2. Pickling: Cleans the steel by removing oxides, improving corrosion resistance.
  3. Galvanizing: Coats with zinc to prevent rust and increase durability.
  4. Electroplating: Adds a protective metal layer, enhancing wear and corrosion resistance.
  5. Painting/Coating: Adds a protective layer to improve longevity in corrosive environments.
  6. Polishing: Improves surface finish and aesthetic appeal.

Custom surface treatment requirements can be accommodated upon request.

Disclaimer 
The above heat treatment instructions and surface finish processing methods for A516 steel are provided for informational purposes only. Actual results may vary based on specific conditions and equipment used. Testing is recommended, and a metallurgical expert or material supplier should be consulted to ensure the processes are suitable for your specific application. The user assumes all risks and liability for the use of this information.

Our Service

SteelPRO Group – manufacturer and solution provider for special steel, offering multi-industry application solutions and customised services, 100% quality free, accompanying customers in their growth!

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