ASTM A607 Steel, grade 55, hot rolled

ASTM A607 Steel, grade 55, hot rolled Product Information -:- For detailed product information, please contact sales. -: ASTM A607 Steel, grade 55, hot rolled Synonyms -:- For detailed product information, please contact sales. -:

ASTM A607 Steel, grade 55, hot rolled Product Information -:- For detailed product information, please contact sales. -: ## **Product Datasheet: ASTM A607 Grade 55 Hot-Rolled Steel Sheet & Strip** **Product Overview** ASTM A607 Grade 55 is a **hot-rolled, high-strength, low-alloy (HSLA) steel sheet and strip** engineered for applications requiring **enhanced strength (55 ksi minimum yield) combined with guaranteed atmospheric corrosion resistance**. This grade occupies a strategic performance niche, offering approximately 10% higher yield strength than the common Grade 50 while maintaining the excellent weldability and weathering characteristics of the A607 series. Through microalloying with columbium (niobium) or vanadium and the mandatory inclusion of copper, it delivers reliable performance in exposed structural and formed components where both load capacity and long-term durability are priorities. It is supplied in the standard hot-rolled condition, providing a cost-effective solution for demanding outdoor applications. **Key International Standards** * **Primary Standard:** **ASTM A607** - Standard Specification for Steel, Sheet and Strip, High-Strength, Low-Alloy, Columbium or Vanadium, or Both, Hot-Rolled and Cold-Rolled. * **Governing Specification:** This product conforms to the requirements for **Grade 55** in the **hot-rolled** condition as defined in ASTM A607. * **Type Classification:** **Type 1 (Columbium)** or **Type 2 (Vanadium)**. This designation indicates the primary microalloying element used for grain refinement and precipitation strengthening. * **Corrosion Resistance:** Requires a **minimum copper content of 0.20%**, providing approximately **twice the atmospheric corrosion resistance** of plain carbon steels without copper. This is a standard, non-optional feature. * **Material Condition:** Supplied in the **hot-rolled** condition, typically with a mill scale surface. It may be specified as **HRPO (Hot Rolled, Pickled and Oiled)** for applications requiring a clean surface for painting or further processing. **Chemical Composition (Weight % - ASTM A607 Grade 55 Requirements)** Chemistry is balanced to achieve higher strength while preserving weldability and corrosion resistance. | Element | Requirement (Max, unless noted) | Purpose & Note | | :--- | :--- | :--- | | **Carbon (C)** | 0.25% | Slightly elevated for increased strength. | | **Manganese (Mn)** | 1.35% | Solid solution strengthening. | | **Phosphorus (P)** | 0.04% | Impurity control. | | **Sulfur (S)** | 0.05% | Impurity control. | | **Silicon (Si)** | 0.30% | Deoxidizer. | | **Copper (Cu)** | **0.20% min** | **Mandatory** for atmospheric corrosion resistance. | | **Columbium (Cb/Nb)** | 0.05% Max (Type 1) | Primary grain refiner for Type 1. | | **Vanadium (V)** | 0.15% Max (Type 2) | Primary precipitation strengthener for Type 2. | | **Carbon Equivalent (C.E. IIW)** | -- | Typically 0.40 - 0.48, indicating **good weldability with proper procedure control**. | **Physical & Mechanical Properties** | Property | Requirement (ASTM A607 Grade 55) | Characteristics & Performance | | :--- | :--- | :--- | | **Yield Strength (Min)** | 55 ksi (380 MPa) | Typically 58 - 68 ksi (400 - 470 MPa). | | **Tensile Strength** | 70 ksi (485 MPa) min | Typically 75 - 85 ksi (517 - 586 MPa). | | **Elongation in 2" (Min)** | 18% | Maintains good ductility for structural forming. | | **Surface Finish** | Standard **hot-rolled mill scale**. | Characteristic oxide layer; HRPO available for painting. | | **Dimensional Tolerance** | Conforms to **ASTM A568** for hot-rolled sheet. | Standard commercial tolerances. | | **Atmospheric Corrosion Resistance** | ~2x that of plain carbon steel. | Integral weathering property; forms a protective patina. | | **Key Feature** | **High-Strength Weathering Sheet Steel:** Provides a meaningful strength upgrade (55 ksi) over standard 50 ksi weathering sheet, offering designers greater efficiency for exposed structural applications where weight savings or higher design stresses are beneficial. | **Product Applications** ASTM A607 Grade 55 hot-rolled sheet is specified for structural components and formed parts in severe service environments requiring both high strength and corrosion resistance. * **Heavy Equipment & Machinery:** Structural cab frames, boom liners, heavy-duty fenders, and reinforced panels for construction, mining, and agricultural machinery. * **Transportation:** Chassis components for dump trucks, reinforced trailer side rails, container corner posts, and structural members for specialized vehicles. * **Building & Construction:** Heavier-gauge roof and wall panels, long-span decking, industrial door stiffeners, and structural supports in corrosive atmospheres. * **Material Handling:** Components for high-capacity shelving, racking systems, and bulk material containers. * **Energy & Utility:** Structural housings, support frames, and access panels for outdoor electrical and utility equipment. **Advantages & Fabrication Notes** * **Good Weldability with Procedure Adherence:** The moderate carbon equivalent requires established welding procedures. **Preheating (150-300°F / 66-149°C)** is recommended for thicker material or highly restrained joints to prevent hydrogen-induced cracking. Low-hydrogen electrodes and processes are essential. * **Moderate Formability:** Suitable for **moderate cold forming** operations such as bending, roll-forming, and punching. It is less formable than Grade 50 due to its higher strength; larger bend radii and more force are typically required. Complex forming may benefit from hot-forming techniques. * **Corrosion Performance as a Substrate:** When painted, the weathering base metal provides a superior backup system. If the coating is damaged, the underlying steel forms a protective oxide, slowing corrosion progression compared to non-weathering steels. * **Surface Preparation for Coating:** For optimal paint performance, **mill scale must be removed** via abrasive blasting, grinding, or by specifying the **HRPO (Pickled and Oiled)** condition, which provides a clean, ready-to-coat surface. * **Cost vs. Performance:** Offers a cost-effective strength increase over Grade 50 for applications where the next available step might be a more expensive quenched & tempered or cold-rolled high-strength grade. **Disclaimer:** This datasheet describes **ASTM A607 Grade 55 Hot-Rolled** sheet and strip. For procurement, specify: **ASTM A607, Grade 55, Type (1 or 2 if relevant), hot-rolled, and surface condition** (as-rolled or HRPO). Reference **ASTM A568** for dimensional tolerances. **Important Comparisons & Considerations:** * **vs. Grade 50:** Provides higher strength but with slightly reduced formability and potentially more stringent welding requirements. A full redesign for the higher strength is necessary. * **vs. ASTM A606 Type 5:** A606 Type 5 is a chemistry-based weathering steel with a typical yield of 55 ksi. A607 Grade 55 provides a **guaranteed minimum yield strength**, offering greater design certainty. * **Toughness:** The base A607 specification does not include impact testing. For dynamically loaded or low-temperature applications, supplementary Charpy V-Notch requirements should be specified. * **Availability:** Confirm with suppliers, as production runs for Grade 55 may be less frequent than for Grade 50. This grade is an excellent choice for engineers seeking to optimize structural efficiency in exposed applications without venturing into the higher cost bracket of ultra-high-strength or specially heat-treated steels. -:- For detailed product information, please contact sales. -: ASTM A607 Steel, grade 55, hot rolled Specification Dimensions Size： Diameter 20-1000 mm Length <4724 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 A607 Steel, grade 55, hot rolled Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A607 Steel, grade 55, hot rolled -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A607 Steel, grade 55, hot rolled -:- For detailed product information, please contact sales. -:

Packing of ASTM A607 Steel, grade 55, hot rolled -:- 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 1195 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