ASTM A148 Grade 115-95 Cast Steel Seamless tube

ASTM A148 Grade 115-95 Cast Steel Seamless tube Product Information -:- For detailed product information, please contact sales. -: ASTM A148 Grade 115-95 Cast Steel Seamless tube Synonyms -:- For detailed product information, please contact sales. -:

ASTM A148 Grade 115-95 Cast Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Name:** ASTM A148 Grade 115-95 Cast Steel **Overview** ASTM A148 Grade 115-95 is a **very high-strength, quenched and tempered (Q&T) low-alloy cast steel** specified for structural applications demanding exceptional mechanical properties. This premium grade offers one of the highest strength levels within the ASTM A148 standard, with a **minimum tensile strength of 115 ksi (795 MPa) and a minimum yield strength of 95 ksi (655 MPa)**. It is engineered through a carefully controlled alloy composition and rigorous heat treatment to achieve an optimal balance of extreme strength, good ductility, and adequate toughness. It is used for the most critical, highly stressed components in heavy machinery and equipment. **Key International Standards & Designation** * **Primary Standard:** **ASTM A148/A148M-21** - Standard Specification for Steel Castings, High Strength, for Structural Purposes. * **Grade Designation:** **Grade 115-95** * **115:** Minimum tensile strength in **kips per square inch (ksi)**, i.e., **115 ksi**. * **95:** Minimum yield strength (0.2% offset) in **ksi**, i.e., **95 ksi**. * **Metric Equivalents:** 115 ksi ≈ **795 MPa** (Tensile), 95 ksi ≈ **655 MPa** (Yield). * **Heat Treatment:** **Mandatory.** This grade is supplied **exclusively in the quenched and tempered (Q&T) condition**. Achieving these properties requires precise control of austenitizing, quenching, and tempering processes. * **Common International Equivalents:** * **EN:** Approximate counterpart in terms of strength could be a high-grade cast alloy steel such as **1.7225 / 34CrMo4** or **1.6582 / 34CrNiMo6** (after Q&T). * **Other:** No direct universal equivalent; it represents a performance class within the ASTM system. **Chemical Composition (Heat Analysis, % by weight, typical for achieving 115-95 properties)** While ASTM A148 allows flexibility, foundries typically employ a low-alloy chemistry to ensure hardenability, especially in thicker sections. * **Carbon (C):** **0.30 - 0.40%** (Balanced for core strength and toughness). * **Manganese (Mn):** **0.80 - 1.20%** * **Silicon (Si):** **0.20 - 0.80%** * **Chromium (Cr):** **0.50 - 1.00%** (Commonly added to increase hardenability, strength, and tempering resistance). * **Molybdenum (Mo):** **0.15 - 0.30%** (Often added to enhance hardenability and tempering resistance, and to reduce temper embrittlement). * **Nickel (Ni):** **Up to 1.50%** (May be added, particularly for heavy sections, to improve hardenability and low-temperature toughness). * **Phosphorus (P):** **≤ 0.025%** (Max). * **Sulphur (S):** **≤ 0.025%** (Max). **Physical & Mechanical Properties (in quenched and tempered condition)** * **Tensile Strength (Rm):** **≥ 115 ksi (795 MPa)** * **Yield Strength (Rp0.2):** **≥ 95 ksi (655 MPa)** * **Elongation in 2 inches (50 mm):** **≥ 15%** (Minimum). Remarkable ductility for this strength level. * **Reduction of Area:** **≥ 30%** (Minimum). * **Hardness (Brinell):** Typically in the range of **270 - 320 HBW**, depending on the tempering temperature. * **Impact Energy (Charpy V-Notch):** **Not required by the base standard, but CRITICAL to specify.** Supplementary requirements (S1, S2, etc.) must be used. For this grade, common specifications might require **20 ft-lb (27 J) minimum at room temperature or 0°F (-18°C)**. * **Modulus of Elasticity:** **≈ 29,000 ksi (200 GPa).** **Product Features** 1. **Ultra-High Strength:** Provides exceptional load-bearing capacity in a compact design, enabling weight reduction in highly stressed components. 2. **Good Fracture Resistance:** When impact requirements are specified, it offers a reliable level of toughness suitable for many demanding applications, considering its strength. 3. **Good Wear Resistance:** The high hardness and strength contribute to good resistance against abrasive wear. 4. **Weldability (Requires Extreme Caution):** Weldable only with stringent procedures. **Mandatory** pre-heat (often 400-600°F / 200-315°C), strict use of low-hydrogen consumables, controlled interpass temperature, and **mandatory Post-Weld Heat Treatment (PWHT)** are required to avoid hydrogen-induced cracking and to temper the brittle HAZ. Welding should be minimized and designed out where possible. 5. **Machinability:** Difficult. Requires rigid machine tools, premium-grade tooling (carbide or ceramic), low cutting speeds, and ample cooling/lubrication. **Typical Applications** Grade 115-95 is reserved for the most critical, high-stress components. * **Heavy Mining & Construction Equipment:** **Gear blanks for large final drives, shovel dipper teeth adapters, crusher jaws, excavator boom connection points**. * **Power Generation:** **Turbine casings, high-pressure valve bodies, generator end shields**. * **Metal Forming & Forging:** **Press frames (uprights, crowns), anvil blocks, die holders**. * **Defense:** **Armored vehicle components, turret rings, heavy weapon mounts**. * **High-Performance Automotive/Racing:** **Critical suspension components, uprights, gearbox cases** (for top-level motorsport). **Casting & Quality Supplements** * **Casting Process:** Typically produced via high-integrity processes like **air-set sand casting** or **investment casting**. * **Heat Treatment:** **Critical and Proprietary.** Involves full austenitization, vigorous quenching (often in oil), and tempering to the specific strength/toughness window. * **Quality Assurance:** Mechanical tests are performed on coupons cast from the same heat and subjected to identical heat treatment. * **Essential Supplementary Requirements:** * **Impact Testing (S-series):** Almost always specified. Define test temperature and minimum energy. * **Non-Destructive Testing (R1, U1):** Radiographic (RT) or Ultrasonic Testing (UT) is common for critical areas. * **Hardness Survey (H1):** To ensure uniformity. --- **Critical Procurement & Design Note** 1. **Design Collaboration is Essential:** Engage with the foundry early. The achievable properties in the **core of thick sections** depend entirely on the alloy's hardenability. Provide detailed section sizes. 2. **Impact Testing is Non-Optional:** For any structural application, **always specify Charpy V-notch impact requirements.** An order without this is incomplete and risky. 3. **Welding is a Major Consideration:** Design to minimize welding. If welding is necessary, a detailed **Welding Procedure Specification (WPS)** qualified per AWS/ASME standards is required, and the foundry should be consulted. 4. **Order Specification Example:** *"ASTM A148 Grade 115-95, Q&T. Supplementary Requirements: S2 – Charpy V-Notch Impact, 20 ft-lb (27 J) min at 0°F (-18°C); U1 – Ultrasonic Examination per ASTM A609; H1 – Hardness Survey."* 5. **Not a General-Purpose Grade:** Its use is justified only where lower-strength grades (e.g., 105-85, 80-50) are inadequate. The increased cost, fabrication complexity, and risk must be balanced against performance needs. -:- For detailed product information, please contact sales. -: ASTM A148 Grade 115-95 Cast Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5849 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 A148 Grade 115-95 Cast Steel Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A148 Grade 115-95 Cast Steel Seamless tube -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A148 Grade 115-95 Cast Steel Seamless tube -:- For detailed product information, please contact sales. -:

Packing of ASTM A148 Grade 115-95 Cast Steel Seamless tube -:- 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 Seamless 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 2320 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