ASTM A148 Grade 165-150 Cast Steel Tube,Pipe

ASTM A148 Grade 165-150 Cast Steel Tube Product Information -:- For detailed product information, please contact sales. -: ASTM A148 Grade 165-150 Cast Steel Tube Synonyms -:- For detailed product information, please contact sales. -:

ASTM A148 Grade 165-150 Cast Steel Product Information -:- For detailed product information, please contact sales. -: ## **Product Technical Data Sheet: ASTM A148 Grade 165-150 Cast Steel** **1. Product Overview** ASTM A148 Grade 165-150 is a **proprietary ultra-high-strength low-alloy cast steel** that represents one of the highest performance grades commercially available within the ASTM A148 standard series. Designed for exceptionally demanding applications, it provides a minimum tensile strength of **165 ksi (1140 MPa)** and a minimum yield strength of **150 ksi (1035 MPa)**. This grade is engineered for critical components where maximum strength-to-weight ratio, wear resistance, and structural integrity under extreme loads are required. Castings are produced using advanced melting and refining techniques, followed by precise heat treatment to achieve the specified mechanical properties. **2. Governing International Standard** This material is classified under **ASTM A148 / A148M – Standard Specification for Steel Castings, High Strength, for Structural Purposes**. It should be noted that while the standard defines mechanical property requirements, the specific chemical composition and heat treatment for Grade 165-150 are typically proprietary and may vary between foundries. Purchasers are advised to consult with certified suppliers for detailed manufacturing and testing protocols. **3. Typical Chemical Composition** The composition is carefully balanced to achieve deep hardenability and high strength while maintaining sufficient toughness. Representative ranges (in weight %) are: - **Carbon (C):** 0.45–0.55% - **Manganese (Mn):** 0.80–1.20% - **Silicon (Si):** 0.30–0.60% - **Phosphorus (P):** ≤0.020% - **Sulfur (S):** ≤0.015% - **Chromium (Cr):** 1.20–1.80% - **Nickel (Ni):** 2.00–3.00% - **Molybdenum (Mo):** 0.40–0.70% - **Vanadium (V):** 0.08–0.20% - **Trace Additions:** Boron (B) or Niobium (Nb) may be used to enhance hardenability and grain refinement. **Note:** Exact composition is optimized by the foundry based on section size, heat treatment capability, and required properties. **4. Physical & Mechanical Properties** **Minimum Required Properties (per ASTM A148):** - **Tensile Strength:** 165 ksi (1140 MPa) - **Yield Strength (0.2% offset):** 150 ksi (1035 MPa) - **Elongation in 2 in. (50 mm):** 4% - **Reduction of Area:** 18% **Typical As-Delivered Properties (after Quench & Temper):** - **Hardness:** 380–450 HBW - **Modulus of Elasticity:** 29–30 × 10⁶ psi (200–207 GPa) - **Poisson’s Ratio:** ~0.29 - **Density:** 7.85 g/cm³ - **Charpy V-Notch Impact Energy:** Typically 12–20 J at room temperature (subject to supplementary requirements) **Heat Treatment:** Mandatory **quenching and tempering (Q&T)**. Austenitizing followed by oil or high-pressure gas quenching, and tempering in the range of 300–500°F (150–260°C) to achieve the desired strength‑toughness balance. Secondary tempering or stress relieving may be applied for complex geometries. **5. Key Characteristics & Engineering Notes** - **Extreme Strength‑to‑Weight Performance:** Enables lightweight design of heavily loaded components. - **High Wear/Abrasion Resistance:** Suitable for severe abrasive and impact‑abrasive environments. - **Limited Ductility & Toughness:** Compared to lower‑strength grades; careful design to avoid stress concentrations is essential. - **Machinability:** **Very poor** in the heat‑treated condition. Requires pre‑machining in the annealed state, then finish‑machining with rigid setups, premium tooling (carbide/ceramic), and coolants. - **Weldability:** **Not recommended** for fabrication welding. Repair welding only under strict procedures: high preheat (≥400°F/200°C), low‑hydrogen electrodes, controlled interpass temperature, and immediate post‑weld heat treatment (PWHT). - **Inspection:** Ultrasonic (UT) or radiographic (RT) examination is commonly specified to ensure internal soundness. **6. Typical Applications** Grade 165-150 is used in the most demanding sectors where failure is not an option: - **Mining & Aggregates:** Gyratory crusher mainshafts, cone crusher heads, ultra‑heavy‑duty dipper teeth, grinding mill trunnions. - **Oil, Gas & Drilling:** Blowout preventer (BOP) components, high‑pressure wellhead housings, large valve bodies for sour service (with suitable chemistry controls). - **Defense & Aerospace:** Armor components, tank turret structural parts, helicopter landing gear, missile launch rails. - **Heavy Machinery:** Forging press columns, extrusion press rams, high‑load gear blanks, rolling mill backup rolls. - **Energy:** Nuclear reactor structural supports (with added material certification), tidal turbine shafts, heavy‑duty wind turbine hub castings. **7. Summary** ASTM A148 Grade 165-150 is a **premium ultra‑high‑strength cast steel** intended for extreme‑duty applications. Its use involves careful design, stringent manufacturing control, and thorough non‑destructive testing. While it offers unmatched strength, its limited toughness and challenging machinability/weldability necessitate close cooperation between designer, foundry, and end‑user. This material is specified when lower‑strength grades are inadequate and when performance justifies the higher cost and manufacturing complexity. --- **Disclaimer:** The information provided is for general reference. For procurement or design, consult the specific foundry’s data sheets and agree upon detailed technical requirements, including chemistry, heat treatment, testing, and inspection protocols. -:- For detailed product information, please contact sales. -: ASTM A148 Grade 165-150 Cast Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5854 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 165-150 Cast Steel Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A148 Grade 165-150 Cast Steel Tube -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A148 Grade 165-150 Cast Steel Tube -:- For detailed product information, please contact sales. -:

Packing of ASTM A148 Grade 165-150 Cast Steel 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 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 2325 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