ZINCGRIP® FORMABLE 50K / ASTM A1008 class 2 / SAE J1392 050 XLK,Electrogalvanized Carbon Steel Seamless tube, High Strength Low Alloy Steel Seamless tube (HSLAS)

AK Steel Seamless tube ZINCGRIP® FORMABLE 50K / ASTM A1008 class 2 / SAE J1392 050 XLK, Grade 50 Electrogalvanized Carbon Steel Seamless tube, High Strength Low Alloy Steel Seamless tube (HSLAS) Product Information -:- For detailed product information, please contact sales. -: AK Steel Seamless tube ZINCGRIP® FORMABLE 50K / ASTM A1008 class 2 / SAE J1392 050 XLK, Grade 50 Electrogalvanized Carbon Steel Seamless tube, High Strength Low Alloy Steel Seamless tube (HSLAS) Synonyms -:- For detailed product information, please contact sales. -:

AK Steel ZINCGRIP® FORMABLE 50K / ASTM A1008 class 2 / SAE J1392 050 XLK, Grade 50 Electrogalvanized Carbon Steel, High Strength Low Alloy Steel (HSLAS) Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: AK Steel ZINCGRIP® FORMABLE 50K (Class 2) Electrogalvanized HSLA Steel** **AK Steel ZINCGRIP® FORMABLE 50K (Class 2)** is a premium **electrogalvanized (EG) high-strength low-alloy (HSLA) steel sheet** engineered to provide **50 ksi (345 MPa) minimum yield strength** with a **balanced combination of structural performance and moderate formability**, enhanced by a protective zinc coating. Certified to both **ASTM A1008 Class 2 (Structural)** and **SAE J1392 050 XLK** standards, this material is optimized for applications where **primary focus is on structural integrity and weldability**, with sufficient formability for standard manufacturing operations. The "FORMABLE" designation indicates improved bending characteristics over conventional HSLA steels, while the "K" suffix represents a **producer-determined strength range**. The electrogalvanized coating offers superior corrosion protection and paintability, making this an ideal choice for structural components requiring durability and aesthetic finish. --- ## **International Standard & Key Specifications** * **Primary Commercial Designation:** **AK Steel ZINCGRIP® FORMABLE 50K (Class 2)**. * **Cross-Referenced Standards:** * **ASTM A1008/A1008M** - Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy and High-Strength Low-Alloy with Improved Formability. **Class 2: Structural**. * **SAE J1392** - Hot Rolled and Cold Rolled HSLA Steel Sheet and Strip. **Grade Designation: 050 XLK** (050 = 50 ksi min yield, XL = High Strength Low-Alloy, K = Producer-Determined Chemistry). * **Coating Specification:** **Electrogalvanized (EG)** per **ASTM A879**, typically supplied as **EG60 (0.60 oz/ft² total both sides)**. Various coating weights available per requirement. * **Key Distinction:** While maintaining "FORMABLE" characteristics, the **Class 2 designation** prioritizes structural performance and consistency over the maximum formability of Class 1 grades, offering a more cost-effective solution for applications with moderate forming requirements. --- ## **Chemical Composition (Weight %, typical)** The chemistry balances strength achievement with coating compatibility and adequate formability for structural applications. | Element | Composition (Typical for Class 2) | Role in Performance | | :--- | :--- | :--- | | **Carbon (C)** | 0.10 - 0.18 | Provides base strength while maintaining weldability and coating adhesion. | | **Manganese (Mn)** | 0.90 - 1.50 | Primary solid solution strengthener for achieving 50 ksi yield. | | **Phosphorus (P)** | 0.030 max | Controlled impurity for adequate formability. | | **Sulfur (S)** | 0.025 max | Controlled for weldability and ductility. | | **Silicon (Si)** | 0.05 - 0.25 | Kept at moderate levels to ensure good galvanizing response. | | **Columbium (Cb/Nb)** | 0.01 - 0.06 | Key microalloy for grain refinement and precipitation strengthening. | | **Vanadium (V)** | 0.01 - 0.10 | Complementary microalloy for precipitation strengthening. | | **Carbon Equivalent (CE)** | Typically 0.30 - 0.38 | Moderate, indicating good weldability with proper procedures. | **Galvanizing Compatibility:** The chemistry is controlled to prevent issues with the electrogalvanizing process, ensuring a uniform, adherent zinc coating suitable for subsequent painting. --- ## **Typical Physical & Mechanical Properties** Properties represent the electrogalvanized sheet after processing. The electrodeposition process minimally affects base metal properties. | Property | Value / Description | | :--- | :--- | | **Yield Strength (min)** | **345 MPa (50,000 psi)** | | **Tensile Strength** | 480 - 620 MPa (70,000 - 90,000 psi) | | **Elongation in 2-in (50 mm) (min)** | **18% - 22%** (Adequate for most structural forming operations) | | **Yield-to-Tensile Ratio** | Typically 0.72 - 0.80 | | **Modulus of Elasticity** | ~200 GPa (29 x 10⁶ psi) | | **Coating Type** | **Electrogalvanized (EG)** - Zinc electrodeposited for uniform coverage. | | **Coating Mass (Typical)** | **EG60** (Total 0.60 oz/ft² or ~185 g/m², both sides). Other designations (EG40, EG90) available. | | **Coating Characteristics** | Smooth, consistent, spangle-free surface. Excellent for painting. | | **Formability** | **Good (for structural applications).** Suitable for **simple to moderate bending, roll-forming, and stamping.** Minimum bend radius typically **1.5-2.0× material thickness**. | | **Weldability** | **Very Good.** Can be welded using common processes (RSW, GMAW, SMAW). Low-hydrogen practices recommended for thicker sections. | | **Corrosion Resistance** | Zinc coating provides sacrificial protection, significantly extending service life, especially when painted. | --- ## **Product Applications** This material is designed for structural components requiring 50 ksi strength, corrosion protection, and moderate formability, particularly where a painted finish is desired. **Primary Industries and Products:** 1. **Structural Components & Framing:** * **Building frames, purlins, and structural supports.** * **Equipment bases and mounting brackets.** * **Industrial shelving and storage system components.** 2. **Transportation Equipment:** * **Trailer and truck body structural members.** * **Agricultural equipment frames and guards.** * **Heavy vehicle interior structural components.** 3. **HVAC & Electrical:** * **Heating/ventilation equipment housings and supports.** * **Electrical enclosure frames and cabinets.** * **Switchgear components and supports.** 4. **Industrial Equipment:** * **Machine guards and safety enclosures.** * **Material handling equipment components.** * **Work platforms and access structures.** 5. **Consumer Durables:** * **Appliance structural frames and supports.** * **Office furniture frames and brackets.** --- ## **Advantages and Fabrication Considerations** * **Advantages:** * **Balanced Performance:** Optimized blend of 50 ksi strength, structural reliability, and moderate formability. * **Superior Corrosion Protection:** Electrogalvanized coating provides excellent base for painted finishes and long-term durability. * **Cost-Effectiveness:** Class 2 designation often offers better value than Class 1 for applications not requiring extreme formability. * **Excellent Paintability:** Smooth EG surface requires minimal pretreatment for high-quality painting. * **Consistent Quality:** Dual certification ensures reliable mechanical and coating properties. * **Fabrication Considerations:** * **Welding Adjustments:** For resistance spot welding, parameters may need adjustment to accommodate the zinc coating. Proper ventilation is necessary. * **Forming Limitations:** Not suitable for severe deep drawing or complex stamping. Adhere to recommended minimum bend radii. * **Surface Preparation:** The EG surface is paint-ready; ensure proper cleaning to remove forming lubricants or contaminants before painting. * **Edge Protection:** While the zinc coating protects sheared edges sacrificially, additional edge treatment may be beneficial in highly corrosive environments. * **Material Specification:** Clearly specify **ZINCGRIP® FORMABLE 50K / ASTM A1008 Class 2 / SAE 050 XLK** to ensure receipt of the correct product variant. * **Alternative Selection:** For applications requiring **maximum formability**, consider Class 1 grades. For **higher strength** needs, evaluate higher K-grade materials. **In summary, AK Steel ZINCGRIP® FORMABLE 50K (Class 2) provides an engineered solution for structural applications requiring dependable 50 ksi strength, corrosion resistance, and adequate manufacturability. It represents an optimal choice for manufacturers seeking to balance performance, durability, and cost-effectiveness in components that will be formed, welded, and finished with paint systems.** -:- For detailed product information, please contact sales. -: AK Steel ZINCGRIP® FORMABLE 50K / ASTM A1008 class 2 / SAE J1392 050 XLK, Grade 50 Electrogalvanized Carbon Steel, High Strength Low Alloy Steel (HSLAS) Specification Dimensions Size： Diameter 20-1000 mm Length <4576 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 ZINCGRIP® FORMABLE 50K / ASTM A1008 class 2 / SAE J1392 050 XLK, Grade 50 Electrogalvanized Carbon Steel, High Strength Low Alloy Steel (HSLAS) Properties -:- For detailed product information, please contact sales. -:

Applications of AK Steel Seamless tube ZINCGRIP® FORMABLE 50K / ASTM A1008 class 2 / SAE J1392 050 XLK, Grade 50 Electrogalvanized Carbon Steel Seamless tube, High Strength Low Alloy Steel Seamless tube (HSLAS) -:- For detailed product information, please contact sales. -: Chemical Identifiers AK Steel Seamless tube ZINCGRIP® FORMABLE 50K / ASTM A1008 class 2 / SAE J1392 050 XLK, Grade 50 Electrogalvanized Carbon Steel Seamless tube, High Strength Low Alloy Steel Seamless tube (HSLAS) -:- For detailed product information, please contact sales. -:

Packing of AK Steel Seamless tube ZINCGRIP® FORMABLE 50K / ASTM A1008 class 2 / SAE J1392 050 XLK, Grade 50 Electrogalvanized Carbon Steel Seamless tube, High Strength Low Alloy Steel Seamless tube (HSLAS) -:- 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 1047 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