ASTM A515 Steel Flange, grade 70

1,We Manufacturing processes are primarily classified into four types: 1:Forging, 2:Casting, 3:Cutting, 4:Rolling. 2,We can manufacture in accordance with these standards. Standards: GB Series (Chinese Standards), JB Series (Machinery Standards), HG Series (Chemical Industry Standards), ASME B16.5 (American Standards), BS4504 (British Standards), DIN (German Standards), and JIS (Japanese Standards). Internationally, there are two primary systems of pipe flange standards: the European system, represented by the German DIN standards (including those of the former Soviet Union), and the American system, represented by the US ANSI pipe flange standards. Other common standards include: the Chinese Ministry of Machinery Industry standards (JB series), the Ministry of Chemical Industry standards (HG series), the Chinese National Standard *GB/T 9112–9124-2010 Steel Pipe Flanges*, as well as US standards (ASME B16.5), British standards (BS4504), German standards (DIN), Japanese standards (JIS), and marine standards (CBM), among others. The nominal pressure ratings for the PN series are designated by "PN" and comprise the following nine levels: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160. The nominal pressure ratings for the Class series are designated by "Class" and comprise the following six levels: Class150, Class300, Class600, Class900, Class1500, and Class2500. Flange Classification 1. **According to Chemical Industry Standards:** Flanges are classified as follows: Plate Flat Welding Flange (PL), Necked Flat Welding Flange (SO), Necked Butt Welding Flange (WN), Integral Flange (IF), Socket Welding Flange (SW), Threaded Flange (Th), Butt Welding Ring Loose Flange (PJ/SE), Blind Flange (BL), Flat Welding Ring Loose Flange (PJ/PJ), and Lined Blind Flange (BL(s)). 2. **According to Petrochemical (SH) Industry Standards:** Flanges are classified as follows: Threaded Flange (PL), Butt Welding Flange (WN), Flat Welding Flange (SO), Socket Welding Flange (SW), Loose Flange (LJ), and Blind Flange (no specific designation). 3. **According to Machinery (JB) Industry Standards:** Flanges are classified as follows: Integral Flange, Butt Welding Flange, Plate Flat Welding Flange, Butt Welding Ring Plate Loose Flange, Flat Welding Ring Plate Loose Flange, Lap Joint Ring Plate Loose Flange, and Blind Flange. 4. **According to Connection Method/Type:** Flanges are classified as follows: Plate Flat Welding Flange, Necked Flat Welding Flange, Necked Butt Welding Flange, Socket Welding Flange, Threaded Flange, Blind Flange, Necked Butt Welding Ring Loose Flange, Flat Welding Ring Loose Flange, Ring-Type Joint (RTJ) Flange and Blind Flange, Large-Diameter Plate Flange, Large-Diameter High-Neck Flange, Figure-8 Blind Plate, Butt Welding Ring Loose Flange, etc. 5. **According to the Component Being Connected:** Flanges can be classified into Vessel Flanges and Pipe Flanges. 6. **According to Structural Type:** Flanges include Integral Flanges, Threaded Flanges, Flat Welding Flanges, Butt Welding Flanges, Lap Joint (Loose/Swivel) Flanges, and Blind Flanges. A flange—also referred to as a flange plate or rim—is a component used to connect shafts to one another, or, more commonly, to join the ends of pipes. Flanges are also utilized at the inlet and outlet ports of equipment to facilitate connections between two devices—for instance, the flange on a speed reducer. A "flange connection" or "flanged joint" refers to a detachable joint assembly comprising three interconnected elements—a flange, a gasket, and bolts—that together form a sealed structural unit. In the context of piping systems, a "pipe flange" specifically denotes a flange used for plumbing within the installation; when applied to equipment, it refers to the inlet or outlet flange of that specific device. Flanges feature a series of holes through which bolts are inserted to securely fasten the two flanges together, while a gasket placed between the flanges ensures a leak-proof seal. Flanges are broadly categorized into three types: threaded (screw-in) flanges, welded flanges, and clamp-type flanges. Flanges are invariably used in pairs; threaded flanges are suitable for low-pressure piping applications, whereas welded flanges are required for systems operating at pressures exceeding 4 kilograms per square centimeter. A sealing gasket is inserted between the two flange plates, which are then firmly secured using bolts. The thickness of a flange—as well as the specifications of the bolts used to fasten it—vary depending on the specific pressure rating required for the application. When connecting equipment such as water pumps or valves to piping systems, the corresponding connection points on these devices are often manufactured in the shape of a matching flange; this method of attachment is also referred to as a "flange connection." Generally, any connecting component that utilizes bolts to join and seal the perimeters of two flat surfaces—such as the joints in ventilation ducts—is termed a "flange"; such components may collectively be classified as "flange-type parts." However, since such a connection often constitutes merely a *portion* of a larger device—for instance, the interface between a flange and a water pump—it would be inappropriate to classify the entire water pump itself as a "flange-type part." Conversely, smaller components—such as valves—that feature such flanged interfaces may indeed be appropriately categorized as "flange-type parts." -:- For detailed product information, please contact sales. -: ASTM A515 Steel Flange, grade 70 Product Information -:- For detailed product information, please contact sales. -: ASTM A515 Steel Flange, grade 70 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A515 Steel, grade 70 Product Information -:- For detailed product information, please contact sales. -: ## **Product Datasheet: ASTM A515 / A515M Grade 70 Steel Plate** **Product Overview** ASTM A515 Grade 70 is a medium to high-carbon **firebox-quality** steel plate specifically designed for **elevated temperature service** in pressure vessels and industrial boilers. Designated as a "firebox quality" steel, it is manufactured with internal quality requirements that make it suitable for fusion welding and withstanding high temperatures without significant degradation in strength. Grade 70 is the highest standard strength grade within the ASTM A515 specification, offering a minimum yield strength of 38 ksi and minimum tensile strength of 70 ksi at room temperature. It is engineered to provide reliable performance in applications involving moderate heat, such as boiler shells, pressure vessels, and other containment systems operating at elevated temperatures. **Key International Standards** * **Primary Standard:** **ASTM A515 / A515M** - Standard Specification for Pressure Vessel Plates, Carbon Steel, for Intermediate- and Higher-Temperature Service. * **Governing Specification:** This product conforms to all requirements for **Grade 70** as defined in ASTM A515. * **Quality Designation:** **"Firebox Quality"** – This designation indicates the steel is produced to a quality suitable for riveted or fusion welded construction of pressure vessels and boilers where reliability under stress and heat is paramount. * **Heat Treatment:** Typically supplied in the **normalized** or **stress-relieved** condition, which refines the grain structure and enhances toughness and uniformity, especially important for weldments and high-temperature service. * **Related Standards:** Often cross-referenced or compared with **ASTM A516 Grade 70** (for lower temperature service) and **ASME SA-515**. **Chemical Composition (Weight % - ASTM A515 Grade 70 Requirements)** The chemistry is balanced for strength and good weldability at elevated temperatures, with controlled carbon and manganese levels. | Element | ASTM A515 Grade 70 Requirement (Max, unless noted) | Typical Range / Aim | | :--- | :--- | :--- | | **Carbon (C)** | 0.28% (for plates ≤ 2") | 0.24 - 0.28% | | **Manganese (Mn)** | 0.90% (for plates ≤ 2") | 0.85 - 0.90% | | **Phosphorus (P)** | 0.035% | ≤ 0.025% | | **Sulfur (S)** | 0.035% | ≤ 0.025% | | **Silicon (Si)** | 0.15 - 0.40% | 0.20 - 0.35% | | **Carbon Equivalent (C.E. IIW)** | Not specified in standard | Typically 0.44 - 0.50 | **Physical & Mechanical Properties (Room Temperature)** | Property | Requirement (ASTM A515 Grade 70) | Typical Performance / Notes | | :--- | :--- | :--- | | **Tensile Strength** | 70 - 90 ksi (485 - 620 MPa) | 75 - 85 ksi (517 - 586 MPa) | | **Yield Strength (0.2% Offset)** | 38 ksi (260 MPa) min | 40 - 50 ksi (276 - 345 MPa) | | **Elongation in 2" (Min)** | 21% (for plates ≤ 3/4") | Typically 22-28% | | **Reduction of Area (Min)** | Not specified | Good, characteristic of normalized steel. | | **Modulus of Elasticity** | ~29,000 ksi (200 GPa) | ~29,000 ksi (200 GPa) | | **Density** | 0.284 lb/in³ (7.85 g/cm³) | 0.284 lb/in³ (7.85 g/cm³) | | **Elevated Temperature Strength:** | **Defined by derating curves per ASME Boiler and Pressure Vessel Code, Section II, Part D.** | Retains a significant portion of its strength up to approximately **1000°F (538°C)**, after which strength declines rapidly. | | **Key Feature** | **Firebox Quality for Elevated Temperatures:** Provides a robust combination of room-temperature strength and reliable, code-recognized performance at intermediate to high temperatures, making it a standard choice for welded pressure-containing components in heated service. | **Product Applications** ASTM A515 Grade 70 is specified for pressure vessel and boiler components that operate at sustained elevated temperatures. * **Boiler Drums and Shells:** Main pressure shells for industrial and utility boilers. * **Pressure Vessels:** Reactors, columns, separators, and storage tanks in petrochemical, oil & gas, and power generation industries operating at temperatures above those suitable for A516. * **Heat Exchangers and Condensers:** Shells and channel covers for equipment in high-temperature processes. * **Steam Drums and Accumulators:** For steam generation and distribution systems. * **Distillation Towers and Reactors:** In refineries and chemical plants where process temperatures are elevated. **Advantages & Fabrication Notes** * **Good Weldability with Precautions:** Weldable using standard arc welding processes. However, due to its medium carbon content, it requires: * **Preheat:** Typically 200-300°F (93-149°C) for most thicknesses to prevent hydrogen-induced cracking. * **Low-Hydrogen Practice:** Use of low-hydrogen electrodes (E7018) and carefully controlled procedures. * **Post-Weld Heat Treatment (PWHT):** Often mandatory for thick sections and code-compliant pressure vessel construction to relieve residual stresses and temper the heat-affected zone (HAZ). * **Normalized Microstructure:** Supplying the plate in the normalized condition ensures a fine, uniform grain structure, which improves toughness, ductility, and through-thickness properties. * **Code Compliance:** Fully recognized and with published allowable stresses in the **ASME Boiler and Pressure Vessel Code, Section II, Part D**, making it a standard, approved material for code-stamped pressure equipment. * **Not for Low-Temperature Service:** While tough at room temperature, it is **not recommended** for applications involving impact loading at sub-zero temperatures. For low-temperature service, ASTM A516 or other notch-tough grades should be specified. * **Cost-Effectiveness:** Offers a more economical alternative to low-alloy steels for many high-temperature pressure vessel applications not requiring extreme temperature strength or corrosion resistance. **Disclaimer:** This datasheet provides general information on **ASTM A515 Grade 70**. For procurement and design, the complete ASTM A515/A515M standard must be referenced. Specifications should clearly state the grade (70), heat treatment (e.g., normalized), and any required supplementary testing (e.g., impact testing if specified by the user). **Crucially, design for elevated temperature service must be based on the allowable stress values at the specific design temperature as listed in the ASME BPVC, Section II, Part D.** All welding and post-weld heat treatment must be performed in accordance with qualified procedures under the relevant construction code (e.g., ASME Section VIII, Division 1). Material selection must be approved by a qualified engineer or inspector. -:- For detailed product information, please contact sales. -: ASTM A515 Steel, grade 70 Specification Dimensions Size： Diameter 20-1000 mm Length <4694 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 A515 Steel, grade 70 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A515 Steel Flange, grade 70 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A515 Steel Flange, grade 70 -:- For detailed product information, please contact sales. -:

Packing of ASTM A515 Steel Flange, grade 70 -:- 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 Flange 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 1165 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