ASTM A283/A283M steel standard contains steel grades A283 Grade A, A283 Grade B, A283 Grade C and A283 Grade D.
The minimum yield strength of carbon steel plate A283GrA is above 165Mpa and tensile strength is within 310-415 Mpa when rolling at room temperature.Comparing with other three steel grades in A283,A283 Grade A has the lowest Carbon contains limited,and A283 Grade D has the highest carbon contains for improving its yield strength and tensile strength values.The most common used steel grade is A283 Grade C.
ASTM A283 Grade C Plate is manufactured for general-purpose structural applications requiring medium strength (60 KSI tensile). It has good machinability when compared to other low-carbon steels. All conventional welding methods can be used to join ASTM A283 Grade C Carbon Steel Plate.
ASTM A283 GR.C LOW CARBON STEEL PLATES CHEMICAL COMPOSITION
| Grade | C | Mn | P | S | Si | Cu |
| ASTM A283 Gr.C | 0.24 | 0.90 | 0.035 | 0.04 | 0.40 0.15-0.40 | 0.20 |
ASTM A283 GR.C STEEL PLATES MECHANICAL PROPERTIES
| Tensile strength | Yield strength, min, [MPa] | Elongation in 2" | Elongation in 8" |
| 55,000 75,000 psi [380 - 515 MPa] | 30,000psi [205 MPa] | 25% min | 22% min |
How is A283 GR.C plate used?
ASTM A283 Gr.C Steel Plate is typically used in general construction applications, such as bridges, buildings, and other structures. ASTM A283 Grade C Plate is used for general purpose structural applications of medium strength requirement. These plates have good machinability,, as compared to any low carbon steel.
SA A516 Grade 70 Steel Plate
ASTM A516 gr 70 Rolled Plate is a medium carbon alloy that contains manganese, phosphorus, sulfur, and silicon. These added alloying elements provide increased strength and versatility in highly demanding applications such as pressure vessels requiring moderate to lower temperatures where notch toughness is essential.
Chemical Requirements of SA A516
*Elements represented in percentage
| Elements | SA 516 Gr 60 (Grade 415) |
SA 516 Gr 65 (Grade 450) |
SA 516 Gr 70 (Grade 485) |
|---|---|---|---|
| Carbon, max Composition % | |||
| 1/2 in. (12.5 mm) and under | 0.21 | 0.24 | 0.27 |
| Over 1/2 to 2 in. (12.5 to 50 mm), incl | 0.23 | 0.26 | 0.28 |
| Over 2 to 4 in. (50 to 100 mm), incl | 0.25 | 0.28 | 0.30 |
| Over 4 to 8 in. (100 to 200 mm), incl | 0.27 | 0.29 | 0.31 |
| Over 8 in. (200 mm) | 0.27 | 0.29 | 0.31 |
| Manganese, max | |||
| 1/2 (12.5) and under: | |||
| Heat analysis | 0.60-0.90 | 0.85-1.20 | 0.85-1.20 |
| Product analysis | 0.55-0.98 | 0.79-1.30 | 0.79-1.30 |
| Over 1/2 in (12.5) | |||
| Heat analysis | 0.85-1.20 | 0.85-1.20 | 0.85-1.20 |
| Product analysis | 0.79-1.30 | 0.79-1.30 | 0.79-1.30 |
| Phosphorus, max | 0.025 | 0.025 | 0.025 |
| Sulfur, max | 0.025 | 0.025 | 0.025 |
| Silicon | |||
| Heat analysis | 0.15-0.40 | 0.15-0.40 | 0.15-0.40 |
| Product analysis | 0.13-0.45 | 0.13-0.45 | 0.13-0.45 |
Tensile Requirements of SA A516
| Tensile Requirements | SA 516 Gr 60 (Grade 415) |
SA 516 Gr 65 (Grade 450) |
SA 516 Gr 70 (Grade 485) |
|---|---|---|---|
| Tensile strength, ksi (MPa) | 60-80(415-550) | 65-85(450-585) | 70-90(485-620) |
| Yield strength, min.B ksi (MPa) | 32(220) | 35(240) | 38(260) |
| Elongation in 8 in. (200 mm), min, % | 21 | 19 | 17 |
| Elongation in 2 in. (50 mm), min, % | 25 | 23 | 21 |
SA A516 516 Steel Plate Applications
A516 is the industry's most popular Pressure Vessel grade of steel plate. It is produced in grades 55, 60, 65, or 70. The most common is Grade 70, sometimes referred to as A516-70. A516 GR70 carbon steel applications include:
Bridges
Buildings
Automotive and truck parts
Railroad cars
Cargo containers
Tote boxes
Construction equipment
Structural tubing
Lighting standards
Transmission pole
The main differences between SA 516 GR 70 and SA 283 GR C are:
Application:
SA 516 GR 70 is a pressure vessel carbon steel plate used for moderate and lower temperature service.
SA 283 GR C is a carbon steel plate used in the construction of storage tanks and low-pressure, temperature-controlled vessels.
Tensile Strength:
SA 516 GR 70 has a higher tensile strength compared to SA 283 GR C, making it suitable for higher pressure applications.
Composition:
SA 516 GR 70 is a carbon steel plate with higher carbon content and toughness required for pressure vessels.
SA 283 GR C is a mild steel plate with lower carbon content and good formability.
Material Properties:
SA 516 GR 70 offers better tensile and yield strength properties needed for pressure vessels operating under high pressures.
SA 283 GR C is known for its good weldability and formability but has lower strength compared to SA 516 GR 70.
In summary, SA 516 GR 70 is typically used for pressure vessel applications requiring higher strength and toughness, while SA 283 GR C is more commonly used in the construction of storage tanks and low-pressure vessels where formability and weldability are important. Choose the grade that best fits the requirements of your specific application.
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