AK Steel ASTM A 607 Class 2 Formable, Grade 60K Hot Rolled Carbon Steel, Medium/High Strength Low Alloy (HSLA)

AK Steel ASTM A 607 Class 2 Formable, Grade 60K Hot Rolled Carbon Steel, Medium/High Strength Low Alloy (HSLA) Product Information -:- For detailed product information, please contact sales. -: AK Steel ASTM A 607 Class 2 Formable, Grade 60K Hot Rolled Carbon Steel, Medium/High Strength Low Alloy (HSLA) Synonyms -:- For detailed product information, please contact sales. -:

AK Steel ASTM A 607 Class 2 Formable, Grade 60K Hot Rolled Carbon Steel, Medium/High Strength Low Alloy (HSLA) Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: AK Steel ASTM A607 Class 2, Grade 60K Hot-Rolled HSLA Steel** **AK Steel ASTM A607 Class 2, Grade 60K** is a premium **high-strength low-alloy (HSLA) steel sheet and strip** engineered to deliver **60 ksi (415 MPa) minimum yield strength** with optimized **structural performance and weldability**. As part of the "**Structural**" (Class 2) category, this grade prioritizes **load-bearing capacity, structural integrity, and fabrication reliability** for demanding applications where high strength is critical. The "**K**" designation indicates a **producer-determined strength range** (typically 60-75 ksi yield), allowing manufacturers to balance strength with other mechanical properties. This material achieves its exceptional strength through **advanced microalloying with vanadium, niobium, or both** in a carefully controlled low-carbon chemistry, providing an outstanding strength-to-weight ratio for structural components requiring 60 ksi yield strength. --- ## **International Standard & Key Specifications** * **Primary Standard:** **ASTM A607/A607M** - Standard Specification for Steel, Sheet and Strip, High-Strength, Low-Alloy, Columbium or Vanadium, or Both, Hot-Rolled and Cold-Rolled. * **Class Distinction:** **Class 2 - Structural**. This classification emphasizes **structural reliability, welding performance, and economic efficiency** for load-bearing applications. * **Grade System:** **"K" Grades (Producer-Determined Strength)**. Grade 60K specifies a minimum yield strength of 60 ksi (415 MPa), with producers optimizing the exact range to balance strength with weldability and formability. * **Related Standards:** * **ASTM A1011/A1011M** - Specification for HSLAS (High-Strength Low-Alloy Steel). * **SAE J1392** - Hot Rolled HSLA and Carbon Steel Sheet and Strip. * **ASTM A370** - Standard Test Methods and Definitions for Mechanical Testing. * **Industry Position:** Represents the **upper strength tier** of widely available Class 2 HSLA steels, bridging the gap between conventional structural steels and specialized high-strength alloys. --- ## **Chemical Composition (Weight %, typical)** The chemistry is precisely controlled to achieve 60 ksi yield strength while maintaining adequate weldability and controlled formability. | Element | Composition (Typical for Class 2, Grade 60K) | Role in Performance | | :--- | :--- | :--- | | **Carbon (C)** | 0.18 - 0.24 | Provides fundamental strength; carefully balanced for weldability at this strength level. | | **Manganese (Mn)** | 1.30 - 1.70 | Critical for achieving 60 ksi yield strength through solid solution strengthening and hardenability control. | | **Phosphorus (P)** | 0.035 max | Impurity, minimized for good ductility and toughness. | | **Sulfur (S)** | 0.04 max | Impurity, tightly controlled for optimal weldability and reduced hot shortness. | | **Silicon (Si)** | 0.15 - 0.50 | Deoxidizer and solid solution strengthener. | | **Columbium (Cb/Nb)** | 0.02 - 0.08 | Essential microalloy for grain refinement and precipitation strengthening. | | **Vanadium (V)** | 0.04 - 0.15 | Key microalloy for precipitation strengthening, particularly effective at higher strength levels. | | **Copper (Cu)** | 0.20 min (optional) | May be specified for enhanced atmospheric corrosion resistance. | | **Carbon Equivalent (CE)** | Typically 0.42 - 0.50 | Requires careful welding procedure development and control. | **Production Note:** Manufacturers may utilize either columbium, vanadium, or a combination of both as primary microalloying elements, with specific ratios optimized for their production processes and desired property balance. --- ## **Typical Physical & Mechanical Properties (Hot-Rolled, Class 2, Grade 60K)** | Property | Value / Description | | :--- | :--- | | **Tensile Strength** | 550 - 700 MPa (80,000 - 102,000 psi) | | **Yield Strength (min)** | **415 MPa (60,000 ksi)** | | **Elongation in 2-in (50 mm) (min)** | **16% - 18%** | | **Yield-to-Tensile Ratio** | Typically 0.75 - 0.83 | | **Modulus of Elasticity** | ~200 GPa (29 x 10⁶ psi) | | **Density** | ~7.85 g/cm³ (0.284 lb/in³) | | **Formability** | **Limited to Moderate.** Suitable for **simple bending and straight forming operations.** Minimum bend radius typically **2.5-3.0× material thickness** for 90° bends. Significant springback and higher forming forces required. | | **Weldability** | **Requires strict procedures.** Preheat of **300-400°F (150-205°C) generally required** for thicknesses >1/8 inch (3 mm). **Low-hydrogen welding practices are mandatory.** Post-weld heat treatment may be necessary for thick sections. | | **Surface Quality** | Standard hot-rolled finish; pickled and oiled condition available for improved surface preparation. | | **Impact Toughness** | Can be specified to meet Charpy V-notch requirements (typically 15-20 ft-lbf at 0°F/-18°C) for structural applications. | --- ## **Product Applications** AK Steel ASTM A607 Class 2, Grade 60K is designed for structural components where 60 ksi yield strength provides significant advantages in weight reduction, load capacity, or structural efficiency. **Primary Industries and Products:** 1. **Heavy Structural Systems:** * **Primary load-bearing beams and columns** in industrial structures and heavy equipment supports. * **Heavy-duty framing systems** for long-span industrial buildings. * **Structural supports** for high-capacity machinery and equipment. 2. **Transportation & Heavy Equipment:** * **Heavy truck chassis components** and frame reinforcements. * **Trailer main beams and structural members** for maximum payload applications. * **Construction, mining, and agricultural equipment frames** requiring 60 ksi strength. * **Off-highway vehicle structural components.** 3. **Material Handling & Industrial:** * **Extra-heavy-duty storage rack systems** for maximum load capacity. * **Crane runway beams** and heavy lifting equipment supports. * **Industrial platforms and access structures** for heavy-duty service. 4. **Infrastructure & Energy:** * **Bridge components** and heavy construction supports. * **Power generation equipment supports** and structural frames. * **Heavy-duty formwork and shoring systems.** 5. **Specialized Applications:** * **Military vehicle components.** * **Heavy machinery bases and frames.** * **Structural components** in material processing systems. --- ## **Advantages and Critical Fabrication Considerations** * **Advantages:** * **High Strength-to-Weight Ratio:** 60 ksi yield strength enables significant weight reduction or increased load capacity. * **Structural Efficiency:** Provides excellent load-bearing capability for structural applications. * **Cost-Effective High Strength:** Offers premium strength at a competitive price compared to alternative high-strength materials. * **Material Availability:** Widely produced and available through major steel service centers. * **Critical Fabrication Considerations:** * **Welding Requirements (Critical):** * **Preheat is essential:** 300-400°F (150-205°C) minimum for most applications. * **Low-hydrogen processes mandatory:** Use E7018, E8018, or equivalent low-hydrogen electrodes. * **Stringent procedure qualification:** WPS must be properly qualified for this strength level. * **Consider post-weld heat treatment** for sections >1/2 inch (13 mm) or highly restrained joints. * **Forming Limitations:** * **Not suitable for complex forming operations.** * **Significant springback** requires careful tooling design and process control. * **Higher minimum bend radii** than lower-strength steels. * **Surface Preparation:** * Thorough mill scale removal essential for coating adhesion. * **Pickled and oiled condition strongly recommended** for painting applications. * **Quality Assurance:** * Require certified test reports confirming 60 ksi minimum yield strength. * Consider specifying supplementary requirements for impact testing if service conditions warrant. * **Design Considerations:** * Account for reduced ductility in design calculations. * Avoid sharp notches and sudden section changes where possible. * Consider fatigue performance in cyclic loading applications. * **Alternative Materials Evaluation:** * For applications requiring **better formability**, consider **lower strength grades or Class 1 materials**. * For applications requiring **better weldability with less preheat**, evaluate **advanced HSLA steels with lower carbon equivalents**. **In summary, AK Steel ASTM A607 Class 2, Grade 60K provides a high-performance 60 ksi yield strength solution for structural applications where maximum strength and load capacity are primary design considerations. While offering exceptional structural efficiency, it requires careful attention to welding procedures, forming limitations, and design details to ensure successful fabrication and reliable service performance. Proper engineering and fabrication practices are essential to fully realize its strength advantages while managing the associated fabrication challenges.** -:- For detailed product information, please contact sales. -: AK Steel ASTM A 607 Class 2 Formable, Grade 60K Hot Rolled Carbon Steel, Medium/High Strength Low Alloy (HSLA) Specification Dimensions Size： Diameter 20-1000 mm Length <4572 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. -: AK Steel ASTM A 607 Class 2 Formable, Grade 60K Hot Rolled Carbon Steel, Medium/High Strength Low Alloy (HSLA) Properties -:- For detailed product information, please contact sales. -:

Applications of AK Steel ASTM A 607 Class 2 Formable, Grade 60K Hot Rolled Carbon Steel, Medium/High Strength Low Alloy (HSLA) -:- For detailed product information, please contact sales. -: Chemical Identifiers AK Steel ASTM A 607 Class 2 Formable, Grade 60K Hot Rolled Carbon Steel, Medium/High Strength Low Alloy (HSLA) -:- For detailed product information, please contact sales. -:

Packing of AK Steel ASTM A 607 Class 2 Formable, Grade 60K Hot Rolled Carbon Steel, Medium/High Strength Low Alloy (HSLA) -:- 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 1043 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