ASTM A514 Steel Tube,Pipe, grade H

ASTM A514 Steel Tube, grade H, plate thickness 19 - 64 mm Product Information -:- For detailed product information, please contact sales. -: ASTM A514 Steel Tube, grade H, plate thickness 19 - 64 mm Synonyms -:- For detailed product information, please contact sales. -:

ASTM A514 Steel, grade H, plate thickness 19 - 64 mm Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A514 Grade H Steel Plate (19 - 64 mm Thickness)** **ASTM A514 Grade H** is a high-strength, quenched and tempered alloy steel plate designed for applications requiring exceptional strength-to-weight ratio and weldability. It is commonly known as "T-1" type steel, a name derived from its original proprietary classification. This grade is specifically engineered to deliver a minimum yield strength of 100 ksi (690 MPa), making it one of the most robust structural steel plates available commercially. Plates in the thickness range of **19 to 64 mm** represent the most common and widely used segment of this product, finding applications in major structural components for heavy machinery, mining, and construction. --- #### **1. International Standards** The primary governing standard for this material is **ASTM A514/A514M**, titled "Standard Specification for High-Yield-Strength, Quenched and Tempered Alloy Steel Plate, Suitable for Welding." The "M" designation indicates metric compliance. It is important to note that equivalent grades exist in other international standards, such as: * **EN 10025-6: S690Q** * **JIS G3128: SHY685** While these grades are similar, they are not always chemically and mechanically identical. ASTM A514 Grade H is the predominant specification in North American markets. --- #### **2. Chemical Composition** The chemical composition is carefully balanced to achieve the desired high strength and toughness through heat treatment, while maintaining excellent weldability. The following table outlines the maximum percentages of key elements for Grade H, as per ASTM A514/A514M. | Element | Composition (Maximum %) | | :--- | :--- | | Carbon (C) | 0.15 - 0.21 | | Manganese (Mn) | 0.95 - 1.30 | | Phosphorus (P) | 0.035 | | Sulfur (S) | 0.040 | | Silicon (Si) | 0.40 - 0.80 | | Chromium (Cr) | 0.50 - 0.80 | | Molybdenum (Mo) | 0.18 - 0.28 | | Vanadium (V) | 0.03 - 0.08 | | Boron (B) | 0.002 - 0.005 | **Key Points:** * The low carbon content is crucial for good weldability and to prevent cracking. * Alloying elements like Chromium, Molybdenum, and Vanadium contribute to hardenability and strength. * Boron is a key additive that significantly enhances hardenability, allowing the steel to achieve high strength even in thicker sections. * Low levels of Phosphorus and Sulfur ensure good toughness and resistance to embrittlement. --- #### **3. Physical & Mechanical Properties** For plates in the **19 to 64 mm thickness range**, the mechanical properties are as follows: | Property | Value | | :--- | :--- | | **Tensile Strength** | 760 - 895 MPa (110 - 130 ksi) | | **Yield Strength (min.)** | 690 MPa (100 ksi) | | **Elongation in 2 in. (min.)** | 18% | | **Reduction of Area (min.)** | 40% | | **Hardness (Brinell)** | Typically 235 - 293 HBW | **Toughness:** ASTM A514 Grade H is required to have excellent impact resistance. Charpy V-Notch impact testing is typically conducted at **-40°F (-40°C)**, with minimum average absorbed energy requirements (often 40 J / 30 ft-lbf at the mill's discretion, but specific values can be negotiated for critical applications). **Other Physical Properties:** * **Density:** Approximately 7.85 g/cm³ (0.284 lb/in³) * **Modulus of Elasticity:** 200 GPa (29,000 ksi) * **Poisson's Ratio:** 0.29 * **Machinability:** Rated as poor due to its high strength and hardness. Special tools and techniques are required. --- #### **4. Product Applications** Due to its exceptional strength and durability, ASTM A514 Grade H plate (19-64 mm) is the material of choice for highly stressed components across various industries: * **Construction Machinery:** Boom arms, sticks, frames, and crawler tracks for excavators, cranes, and bulldozers. * **Mining Equipment:** Bodies of large mining trucks, buckets for shovels and loaders, drill masts, and crusher components. * **Material Handling:** Heavy-duty forklift masts, port cranes, and lifting beams. * **Transportation:** Chassis frames for specialized heavy-haul trucks and trailers. * **Bridge Construction:** For critical, weight-sensitive members in movable bridges or in environments requiring reduced dead load. * **Other:** Support structures for heavy industrial presses and in the bases for large wind turbine towers. --- #### **5. Fabrication Considerations** * **Welding:** While A514 Grade H is considered weldable, it requires strict adherence to proper procedures. Preheating (typically 150-230°C / 300-450°F for this thickness range) and post-weld heat treatment (PWHT) are often mandatory to prevent hydrogen-induced cracking and to restore mechanical properties in the Heat-Affected Zone (HAZ). Low-hydrogen welding processes must be used. * **Cutting:** Can be effectively cut by plasma arc, laser, or waterjet. Oxy-fuel cutting is possible but requires care due to the alloy content. * **Forming:** Cold forming is difficult and should be limited. Hot forming is preferred for significant bends or shapes. ### **Summary** **ASTM A514 Grade H steel plate in the 19-64 mm thickness range** is a premium high-strength, quenched and tempered alloy steel. Its optimized chemical composition delivers a minimum yield strength of 100 ksi, outstanding toughness at low temperatures, and good weldability when proper procedures are followed. It is an indispensable material for engineering applications where reducing weight without compromising structural integrity is paramount. -:- For detailed product information, please contact sales. -: ASTM A514 Steel, grade H, plate thickness 19 - 64 mm Specification Dimensions Size： Diameter 20-1000 mm Length <4280 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: ASTM A514 Steel, grade H, plate thickness 19 - 64 mm Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A514 Steel Tube, grade H, plate thickness 19 - 64 mm -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A514 Steel Tube, grade H, plate thickness 19 - 64 mm -:- For detailed product information, please contact sales. -:

Packing of ASTM A514 Steel Tube, grade H, plate thickness 19 - 64 mm -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Tube drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 751 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition