ASTM A710 Steel Wire, grade A, class 1, 8

ASTM A710 Steel Wire, grade A, class 1, 8 - 19 mm inclusive Product Information -:- For detailed product information, please contact sales. -: ASTM A710 Steel Wire, grade A, class 1, 8 - 19 mm inclusive Synonyms -:- For detailed product information, please contact sales. -:

ASTM A710 Steel, grade A, class 1, 8 - 19 mm inclusive Product Information -:- For detailed product information, please contact sales. -: ## **Product Specification: ASTM A710 Low-Carbon Precipitation-Strengthened Steel** ### **Product Designation** * **Standard:** ASTM A710 / A710M * **Grade:** **A** (Standard Copper-Nickel-Chromium-Molybdenum alloy) * **Class:** **1** (Single Normalize, single temper or double normalize and temper heat treatment) * **Product Form:** Plates, bars, shapes * **Thickness Range:** **8 mm to 19 mm inclusive** (0.31 in to 0.75 in) ### **Overview** ASTM A710 Grade A, Class 1 is a premier **high-strength, low-alloy (HSLA) steel** that derives its exceptional mechanical properties not from high carbon content, but from a **low-carbon, copper-precipitation-hardening mechanism**. This fundamental difference grants it a unique combination of high yield strength, excellent toughness (even at low temperatures), superior weldability, and good corrosion resistance, particularly in atmospheric and marine environments. It is a material of choice for critical applications where weight savings, durability, and structural integrity are paramount. --- ### **1. Chemical Composition (Heat Analysis, % by Weight)** The lean, low-carbon chemistry is the cornerstone of its performance, focusing on precipitation hardening and solid solution strengthening. | Element | Grade A Composition (%) | Role & Effect | | :--- | :--- | :--- | | **Carbon (C)** | 0.07 max | **Extremely low.** This is the key to exceptional weldability and toughness. Strength comes from other elements. | | **Manganese (Mn)** | 0.40 - 0.70 | Provides solid solution strengthening and aids hardenability without compromising weldability. | | **Phosphorus (P)** | 0.025 max | Impurity; kept very low. | | **Sulfur (S)** | 0.025 max | Impurity; kept very low for good through-thickness properties. | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer. | | **Copper (Cu)** | 0.90 - 1.25 | **Core strengthening element.** Forms fine, coherent epsilon-copper precipitates during aging (part of the Class 1 heat treatment), providing significant strength increase. Also enhances atmospheric corrosion resistance. | | **Nickel (Ni)** | 0.60 - 1.00 | Balances the potential hot-shortness effect of copper, improves low-temperature toughness, and enhances corrosion resistance. | | **Chromium (Cr)** | 0.40 - 0.70 | Contributes to solid solution strengthening, improves hardenability, and enhances corrosion/oxidation resistance. | | **Molybdenum (Mo)** | 0.15 - 0.30 | Enhances hardenability, increases strength at elevated temperatures, and improves corrosion resistance. | | **Columbium (Cb/Nb)**| 0.02 - 0.10 | Powerful micro-alloying grain refiner. Inhibits grain growth during heat treatment, ensuring a fine-grained microstructure for toughness. | | **Vanadium (V)** | 0.03 - 0.08 | Additional micro-alloying element for grain refinement and precipitation strengthening. | --- ### **2. Physical & Mechanical Properties (For Thickness 8-19 mm, Class 1)** **A. Physical Properties (Typical)** * **Density:** ~7.87 g/cm³ * **Elastic Modulus:** 200 GPa (29,000 ksi) * **Poisson's Ratio:** 0.29 * **Coefficient of Thermal Expansion:** 11.5 x 10⁻⁶ /K (20-100°C) **B. Mechanical Properties (Minimum Required per ASTM A710, Class 1)** | Property | Requirement (8-19 mm) | Notes | | :--- | :--- | :--- | | **Yield Strength (min)** | 485 MPa (70 ksi) | **Very high yield strength for its low carbon content.** | | **Tensile Strength (min)** | 585 MPa (85 ksi) | | | **Elongation in 50 mm (min)** | 20% | Demonstrates good ductility. | | **Charpy V-Notch Impact Energy** | **See Table** | **Exceptional toughness is a hallmark.** | | **Test Temperature** | **-73°C (-100°F)** | Required test temp for longitudinal specimens. | | **Minimum Energy (Longitudinal)** | **27 J (20 ft-lbf)** | Maintains high toughness at cryogenic temperatures. | --- ### **3. Product Applications** This steel is engineered for demanding, high-value applications where its premium properties justify the cost. * **Pressure Vessels & Boilers:** For high-pressure service where excellent weld integrity and low-temperature toughness are critical (e.g., industrial gas storage, power plant components). * **Offshore & Marine Structures:** Ship hulls, offshore oil & gas platforms (modules, decks), and submarine components benefiting from high strength-to-weight ratio, seawater corrosion resistance, and weldability. * **Cryogenic Applications:** Containment systems for liquefied natural gas (LNG), liquid nitrogen, or other cryogenic fluids due to its exceptional toughness at extremely low temperatures. * **Military & Defense:** Naval shipbuilding, armored vehicle components, and other strategic applications requiring ballistic resistance, weldability, and durability. * **High-Performance Construction:** Critical nodes in architectural structures, bridge components in severe environments, and heavy mining equipment. --- ### **4. International Standards & Designations** ASTM A710 is a specialized, high-performance standard. Direct, comprehensive equivalents are rare, but similar concepts exist. | Standard System | Potential Equivalent / Comparable Grade | Notes | | :--- | :--- | :--- | | **ASTM (USA)** | **A710/A710M Grade A, Class 1** | The defining specification. Class 3 (quenched & tempered) is also common. | | **ASME (USA)** | **SA710** | Adopted for pressure vessel code use. | | **EN (Europe)** | **No direct equivalent.** | The closest in concept might be a thermomechanically rolled, micro-alloyed fine-grain steel like **S460ML** or **S500MC** (EN 10025-4/6), but these achieve strength differently and lack the specific Cu-Ni-Cr-Mo system. | | **JIS (Japan)** | **No direct equivalent.** | High-tensile steels like **SEV295** (JIS G3128) for pressure vessels share some application space but not the exact metallurgy. | | **NACE MR0175/ISO 15156** | **Typically compliant** | The low carbon and alloying often make it suitable for sour service (H₂S environments), subject to hardness verification. | --- ### **Key Advantages & Processing Notes** 1. **Unmatched Weldability:** The ultra-low carbon equivalent (<0.40) virtually eliminates pre-heat requirements for most welding procedures, drastically reducing fabrication cost and risk of cold cracking. 2. **Heat Treatment (Class 1):** Involves normalizing (and possibly tempering) to achieve the required mechanical properties through the copper precipitation mechanism. This results in a uniform, fine-grained structure. 3. **Strength-to-Weight Ratio:** Its high yield strength allows for thinner, lighter sections compared to conventional HSLA steels, leading to weight savings in mobile structures. 4. **Property Consistency:** The precipitation-hardening mechanism provides uniform strength throughout the thickness of the 8-19 mm section. ### **Summary** **ASTM A710 Grade A, Class 1 (8-19 mm)** is not a commodity steel but a **sophisticated engineering material**. Its unique precipitation-strengthened, low-carbon metallurgy delivers an almost unparalleled synergy of **high strength (70 ksi min yield), exceptional low-temperature toughness, and outstanding weldability**. This makes it the preferred choice for critical fabrications in offshore, cryogenic, military, and high-pressure applications, where lifecycle performance, safety, and fabrication reliability outweigh initial material cost. It represents a pinnacle of alloy design where strength is decoupled from carbon content to maximize overall performance. -:- For detailed product information, please contact sales. -: ASTM A710 Steel, grade A, class 1, 8 - 19 mm inclusive Specification Dimensions Size： Diameter 20-1000 mm Length <4141 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 A710 Steel, grade A, class 1, 8 - 19 mm inclusive Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A710 Steel Wire, grade A, class 1, 8 - 19 mm inclusive -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A710 Steel Wire, grade A, class 1, 8 - 19 mm inclusive -:- For detailed product information, please contact sales. -:

Packing of ASTM A710 Steel Wire, grade A, class 1, 8 - 19 mm inclusive -:- 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 Wire 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 612 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