ASTM A148 Grade 90-60 Cast Steel

ASTM A148 Grade 90-60 Cast Steel Product Information -:- For detailed product information, please contact sales. -: ASTM A148 Grade 90-60 Cast Steel Synonyms -:- For detailed product information, please contact sales. -:

ASTM A148 Grade 90-60 Cast Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Technical Datasheet: ASTM A148 Grade 90-60 Cast Steel** ## **1. Product Overview** ASTM A148 Grade 90-60 is a medium-to-high-strength carbon steel casting, representing a foundational and widely utilized grade within the ASTM A148 standard. Positioned between the lower-strength grades and premium alloy grades, it provides an optimal balance of enhanced strength, good ductility, and excellent manufacturability. The grade designation "90-60" indicates the minimum required tensile strength of **90 ksi (620 MPa)** and yield strength of **60 ksi (415 MPa)**. This grade is typically supplied in the normalized or normalized and tempered condition, making it a versatile and cost-effective choice for a broad spectrum of industrial structural components. ## **2. Governing International Standard** The defining specification for this product is **ASTM A148 / A148M – Standard Specification for Steel Castings, High Strength, for Structural Purposes**. This international standard provides the minimum mechanical property requirements, guiding the manufacturing and procurement of Grade 90-60 castings. ## **3. Typical Chemical Composition** While the standard is performance-based, the chemical composition is engineered to achieve the specified mechanical properties reliably. A representative composition for Grade 90-60 is as follows (in weight %): * **Carbon (C):** 0.30 - 0.40% * **Manganese (Mn):** 0.70 - 1.20% * **Silicon (Si):** 0.30 - 0.60% * **Phosphorus (P):** 0.035% max * **Sulfur (S):** 0.035% max * **Alloying Elements:** Primarily a carbon steel; may contain residual amounts of chromium, nickel, and molybdenum (each typically <0.35%) but is not intentionally highly alloyed. **Note:** The exact chemistry is controlled by the foundry to ensure consistent mechanical properties across varying casting section sizes and is often optimized for improved weldability and toughness. ## **4. Physical & Mechanical Properties** * **Minimum Mechanical Properties (as per ASTM A148):** * **Tensile Strength:** 90 ksi min (620 MPa min) * **Yield Strength (0.2% Offset):** 60 ksi min (415 MPa min) * **Elongation in 2" (50 mm):** 18% min * **Reduction of Area:** 30% min * **Typical Achieved Properties (After Normalizing):** * **Hardness:** 187 - 235 HBW (Brinell Hardness) * **Modulus of Elasticity:** 29 x 10⁶ psi (200 GPa) * **Poisson's Ratio:** 0.29 * **Density:** 7.85 g/cm³ * **Charpy V-Notch Impact Energy:** Typically 25-40 J at room temperature (often specified as a supplementary requirement). * **Standard Heat Treatment:** Castings are conventionally **Normalized** (heated above the critical temperature and air-cooled) to refine the grain structure and achieve a uniform, reproducible combination of strength and toughness. **Normalizing and Tempering** may also be employed to enhance ductility and relieve residual stresses, particularly in complex geometries. ## **5. Key Characteristics & Engineering Advantages** * **Excellent Strength-Ductility Balance:** Offers a significant increase in yield and tensile strength over Grade 80-50 while maintaining very good elongation and toughness, providing a robust safety margin against overload. * **Superior Weldability:** Retains very good weldability. Standard welding procedures for medium-carbon steels apply, typically requiring preheat in the range of 200-400°F (95-205°C) depending on section thickness, and the use of low-hydrogen electrodes. Post-weld heat treatment is recommended for critical, highly restrained welds. * **Good Machinability:** Can be readily machined in the normalized condition using standard tooling and practices, offering good surface finish and dimensional control. * **Cost-Effective Performance:** Provides a substantial upgrade in load-bearing capacity over lower grades without the significant cost increase associated with high-alloy quench and temper grades. * **Predictable Performance:** The normalized microstructure provides consistent and isotropic properties, making it a reliable choice for engineering design. ## **6. Typical Applications** Grade 90-60 is one of the most commonly specified grades for general heavy-duty structural components across multiple industries: * **Heavy Machinery:** Press frames, rolling mill housings, machine tool structures, crane sheaves, and large gear blanks. * **Construction & Mining:** Excavator boom segments, loader linkage components, shovel bases, and other heavily loaded but non-wearing structural parts. * **Material Handling:** Heavy-duty crane hooks (non-forged), axle housings, large pulley wheels, and conveyor drive frames. * **Energy:** Turbine generator frames, compressor casings, and structural supports for power generation equipment. * **Transportation:** Railroad coupler bodies, truck suspension components, and large marine deck fittings. * **Industrial Processing:** Bases and frames for large pumps, mixers, and other process equipment. ## **7. Summary** **ASTM A148 Grade 90-60** is the **industry benchmark** for a high-value, medium-strength structural cast steel. It successfully bridges the gap between basic carbon steel castings and high-performance alloy grades. Engineers select Grade 90-60 when the design requires **reliable, elevated strength coupled with straightforward fabrication (welding/machining) and predictable service performance**. Its widespread use is a testament to its optimal balance of performance, manufacturability, and cost, making it a first-choice material for countless critical yet non-extreme structural applications. -:- For detailed product information, please contact sales. -: ASTM A148 Grade 90-60 Cast Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5856 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 90-60 Cast Steel Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A148 Grade 90-60 Cast Steel -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A148 Grade 90-60 Cast Steel -:- For detailed product information, please contact sales. -:

Packing of ASTM A148 Grade 90-60 Cast Steel -:- 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 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 2327 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