A517 Grade E is a high-strength quenched and tempered alloy steel plate designed for use in demanding structural applications where exceptional toughness and weldability are required. It is commonly specified for projects involving heavy machinery, pressure vessels, and components that must withstand extreme loading conditions and harsh environments. The steel achieves its properties through a controlled heat treatment process that refines its microstructure, resulting in a material that offers excellent resistance to fracture and reliable performance even at low temperatures. Its ability to maintain strength and ductility under stress makes it a preferred choice in industries such as construction, energy, and manufacturing, where safety and durability are critical considerations.
Mechanical Properties
|
Grade |
Thickness |
Yield strength |
Tensile strength |
Elongation in 2" 1) |
Reduction in area for rectangle specimens 2) |
Reduction in area for round specimens 3) |
|---|---|---|---|---|---|---|
|
E |
0.188 - 2.500 |
100 |
115 - 135 |
16 |
35 |
45 |
|
E |
2.51 - 3.50 |
90 |
105 - 135 |
14 |
- |
45 |
Chemical Composition
|
C |
Mn |
P |
S |
Si |
Cr |
Mo |
Ti |
B |
|---|---|---|---|---|---|---|---|---|
|
0.12 - 0.20 |
0.40 - 0.70 |
0.025 |
0.008 1) |
0.10 - 0.40 |
1.40 - 2.00 |
0.40 - 0.60 |
0.01 - 0.10 2) |
0.001 - 0.005 |
Carbon Equivalent
|
Thickness (in) |
0.188 - 3.500 |
|---|---|
|
Typical CET (wt %) |
0.30 |
|
Typical CEV (wt %) |
0.60 |
processing
Melting and Casting
The process begins with melting carefully selected raw materials in a controlled furnace environment. The chemical composition is closely monitored to achieve the required alloy balance that defines the grade. Once fully melted and homogenized, the steel is cast into ingots or continuous cast slabs, forming the initial semi-finished shape.
Hot Rolling
The slabs are reheated to a precise temperature and then subjected to hot rolling. Multiple passes through rolling mills gradually reduce thickness and shape the material into plates. This stage introduces significant plastic deformation, which refines the grain structure and contributes to the steel's high strength and toughness.
Heat Treatment
After rolling, the plates undergo quenching, where rapid cooling transforms the microstructure into a hard, strong state. This is followed by tempering at a lower temperature to improve toughness, reduce internal stresses, and stabilize the material properties. Strict control of time and temperature ensures consistent performance across the entire plate.
Finishing and Inspection
The final steps include straightening, cleaning, and surface treatment as needed. Comprehensive inspection, such as ultrasonic testing, is performed to detect any internal or surface defects. Only plates that meet the required standards proceed to packaging and shipment.
applications
Heavy Machinery and Equipment
Used in mining machinery, large cranes, and heavy‑duty lifting systems that must withstand dynamic and impact loads during operation.
Pressure Vessels and Storage Tanks
Applied in the energy sector for pressure vessels, storage tanks, and related equipment requiring high strength and good toughness, especially in low‑temperature environments.
Bridges and Structural Construction
Utilized in the fabrication of bridges, building frames, and other structural components where reliable performance under heavy loads is essential.
Offshore and Marine Structures
Selected for offshore platforms, subsea equipment, and marine structures due to its ability to resist harsh environmental conditions and maintain structural integrity.
Transportation Industry
Used in the manufacturing of heavy trucks, specialized vehicles, and rail components where a combination of strength and reduced weight is required.
General Industrial Fabrication
Applied in various industrial machinery and equipment, including processing plants and power generation facilities, where durable and high‑performance steel is needed.
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What is A517GrE?
A517GrE is a high-strength alloy steel plate primarily used in pressure vessel and boiler manufacturing. It has excellent toughness, weldability, and resistance to high temperatures and pressure, complying with ASTM standards.
What are the main chemical components of A517GrE?
The main chemical components of A517GrE include carbon (C), manganese (Mn), silicon (Si), chromium (Cr), molybdenum (Mo), and small amounts of phosphorus (P) and sulfur (S), which ensure its mechanical properties.
What is the minimum tensile strength of A517GrE?
The minimum tensile strength of A517GrE is 690 MPa (100 ksi). This high tensile strength makes it suitable for applications requiring heavy load-bearing and pressure resistance.
What is the yield strength range of A517GrE?
The yield strength range of A517GrE is typically 515-655 MPa (74.7-95 ksi). It provides good ductility and deformation resistance under stress, ensuring structural stability.
Which standards does A517GrE comply with?
A517GrE complies with the ASTM A517 standard, which specifies requirements for high-strength carbon and alloy steel plates for pressure vessels and boilers in harsh service conditions.
What are the common applications of A517GrE?
A517GrE is widely used in manufacturing pressure vessels, boilers, offshore oil platforms, and heavy machinery components that need to withstand high pressure, high temperature, and harsh environments.
Is A517GrE weldable?
Yes, A517GrE has good weldability. Proper preheating and post-weld heat treatment (PWHT) are recommended to avoid weld cracks and ensure the integrity of the welded joint.
What is the recommended preheating temperature for A517GrE welding?
The recommended preheating temperature for A517GrE welding is 150-200°C (302-392°F). This reduces the cooling rate of the weld zone and prevents hydrogen-induced cracking.
Does A517GrE require post-weld heat treatment (PWHT)?
Yes, PWHT is usually required for A517GrE after welding. It relieves residual stresses, improves weld toughness, and enhances the corrosion resistance of the joint, ensuring long-term service reliability.
What is the maximum service temperature of A517GrE?
The maximum service temperature of A517GrE is approximately 450°C (842°F). Beyond this temperature, its mechanical properties may degrade, affecting structural safety.