AK Steel ASTM A 907, Grade 30 Hot Rolled Carbon Steel

AK Steel ASTM A 907, Grade 30 Hot Rolled Carbon Steel, Structural Quality (SQ) Product Information -:- For detailed product information, please contact sales. -: AK Steel ASTM A 907, Grade 30 Hot Rolled Carbon Steel, Structural Quality (SQ) Synonyms -:- For detailed product information, please contact sales. -:

AK Steel ASTM A 907, Grade 30 Hot Rolled Carbon Steel, Structural Quality (SQ) Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: AK Steel ASTM A907 Grade 30 Hot Rolled Carbon Steel** **AK Steel ASTM A907 Grade 30** is a specialized **hot-rolled, high-strength carbon steel sheet and strip** designed specifically for **structural applications requiring a lower strength, highly formable, and weldable material**. This grade provides a **minimum yield strength of 30 ksi (205 MPa)** while maintaining **exceptional formability and weldability** due to its controlled chemical composition. The steel is produced to meet standard **structural quality (SQ) requirements** and is suitable for applications where **excellent bendability and roll-forming characteristics** are critical. Unlike some higher-strength grades, A907 Grade 30 is optimized for **forming complex shapes without cracking or excessive springback**. --- ## **International Standard & Key Specifications** * **Primary Standard:** **ASTM A907/A907M** - Standard Specification for Steel, Sheet and Strip, Heavy Thickness Coils, Hot-Rolled, Carbon, Commercial, Drawing, Structural, and High-Strength Low-Alloy, Grades 30[205] Through 70[480] * **Key Feature:** This specification covers **steel in heavy thickness coils** intended for further processing into cut lengths or sheets, distinguishing it from standard sheet specifications * **Quality Designation:** **Structural Quality (SQ)** - Standard quality for structural applications * **Related Standards:** * **ASTM A568/A568M** - Standard Specification for Steel, Sheet, Carbon, and High-Strength Low-Alloy, Hot-Rolled and Cold-Rolled, General Requirements for * **ASTM A1011/A1011M** - Standard Specification for Steel, Sheet and Strip, Hot-Rolled, Carbon, Structural, High-Strength Low-Alloy and High-Strength Low-Alloy with Improved Formability * **Processing State:** Supplied in **hot-rolled condition** from heavy thickness coils --- ## **Chemical Composition (Weight %, max unless range specified) - Grade 30** The chemistry is carefully controlled to achieve the desired balance of strength, formability, and weldability for Grade 30 applications. | Element | Composition (%) | Role in Performance | | :--- | :--- | :--- | | **Carbon (C)** | 0.25 max | Provides basic strength while maintaining good formability and weldability | | **Manganese (Mn)** | 0.90 max | Enhances strength and hardenability; controlled for optimal formability | | **Phosphorus (P)** | 0.04 max | Impurity, kept low for good formability | | **Sulfur (S)** | 0.05 max | Impurity, controlled for improved formability and weldability | | **Silicon (Si)** | 0.30 max | Deoxidizer; contributes to strength and surface quality | | **Copper (Cu)** | 0.20 min (when specified for corrosion resistance) | Optional for improved atmospheric corrosion resistance | | **Carbon Equivalent (CE)** | Typically ≤ 0.35 | Indicates excellent weldability with minimal preheat requirements | **Note:** The chemical composition may be adjusted within specification limits to optimize mechanical properties and formability characteristics. --- ## **Typical Physical & Mechanical Properties (Hot-Rolled, Grade 30)** | Property | Value / Description | | :--- | :--- | | **Tensile Strength** | 345 - 480 MPa (50,000 - 70,000 psi) | | **Yield Strength (min)** | **205 MPa (30,000 psi)** | | **Elongation in 2-in (50 mm) (min)** | **28%** (higher than typical structural steels, indicating superior formability) | | **Modulus of Elasticity** | ~200 GPa (29 x 10⁶ psi) | | **Density** | ~7.85 g/cm³ (0.284 lb/in³) | | **Formability** | **Excellent.** Specifically designed for severe forming operations. Minimum bend radius can be as low as **0.25 × material thickness** for 180° bends. | | **Weldability** | **Excellent.** Can be welded using all common processes with minimal preheat requirements. | | **Surface Quality** | Standard hot-rolled finish; available pickled and oiled for improved surface condition | --- ## **Product Applications** AK Steel ASTM A907 Grade 30 is ideal for applications requiring extensive forming or bending operations where higher-strength steels might crack or require excessive force. **Primary Industries and Products:** 1. **Light Structural Components:** * **Complex-formed brackets and supports** * **Roll-formed sections** for building products * **Light structural members** requiring tight-radius bends 2. **Transportation Equipment:** * **Formed components** for vehicle interiors and trim * **Light structural parts** for trailers and recreational vehicles * **Mounting brackets and supports** 3. **Building Products:** * **Formed flashing and trim components** * **Roll-formed siding and roofing panels** * **Architectural metalwork** requiring complex shapes 4. **Manufacturing and Fabrication:** * **Deep-drawn components** and formed parts * **Jigs, fixtures, and tooling components** * **Prototype development** where formability is critical 5. **Agricultural Equipment:** * **Formed panels and covers** * **Light structural components** requiring complex shapes --- ## **Advantages and Fabrication Considerations** * **Advantages:** * **Superior Formability:** Excellent elongation allows for complex forming operations without cracking * **Excellent Weldability:** Low carbon equivalent enables welding with minimal preheat * **Cost-Effective:** Provides good strength with excellent fabrication characteristics * **Consistent Quality:** Produced from heavy coils ensuring uniform properties throughout production runs * **Versatile Applications:** Suitable for both structural and formed component applications * **Fabrication Considerations:** * **Surface Preparation:** Hot-rolled scale should be removed for painting or coating; pickled and oiled condition recommended for critical applications * **Forming Tools:** Proper tool design and lubrication recommended for complex forming operations * **Springback Control:** Adequate allowance should be made for springback in forming operations * **Edge Condition:** Sheared edges may require deburring for safety and appearance * **Corrosion Protection:** Standard carbon steel requires protective coatings for exterior applications * **Quality Verification:** Material test reports should be requested to confirm mechanical properties --- ## **Comparison with Other Grades** * **vs. ASTM A570 Grade 30:** A907 Grade 30 typically offers better formability and more consistent properties from coil processing * **vs. Higher Strength Grades:** While lower in strength than Grades 45 or 50, A907 Grade 30 provides significantly better formability * **vs. Drawing Quality Steels:** Offers better strength than drawing quality steels while maintaining good formability **In summary, AK Steel ASTM A907 Grade 30 represents an optimal balance of strength and formability for applications requiring extensive metal forming. Its 30 ksi minimum yield strength combined with excellent elongation makes it ideal for components that must undergo severe forming operations while maintaining structural integrity. When specifications call for a material that can be formed into complex shapes without cracking, A907 Grade 30 provides a reliable, cost-effective solution with predictable performance characteristics.** -:- For detailed product information, please contact sales. -: AK Steel ASTM A 907, Grade 30 Hot Rolled Carbon Steel, Structural Quality (SQ) Specification Dimensions Size： Diameter 20-1000 mm Length <4561 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 907, Grade 30 Hot Rolled Carbon Steel, Structural Quality (SQ) Properties -:- For detailed product information, please contact sales. -:

Applications of AK Steel ASTM A 907, Grade 30 Hot Rolled Carbon Steel, Structural Quality (SQ) -:- For detailed product information, please contact sales. -: Chemical Identifiers AK Steel ASTM A 907, Grade 30 Hot Rolled Carbon Steel, Structural Quality (SQ) -:- For detailed product information, please contact sales. -:

Packing of AK Steel ASTM A 907, Grade 30 Hot Rolled Carbon Steel, Structural Quality (SQ) -:- 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 1032 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