ASTM A515 Steel Tube,Pipe, grade 70

ASTM A515 Steel Tube, grade 70 Product Information -:- For detailed product information, please contact sales. -: ASTM A515 Steel Tube, 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 Tube, grade 70 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A515 Steel Tube, grade 70 -:- For detailed product information, please contact sales. -:

Packing of ASTM A515 Steel Tube, 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 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 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