ASTM A607 Steel Seamless tube, grade 55

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

ASTM A607 Steel, grade 55, cold rolled Product Information -:- For detailed product information, please contact sales. -: ## **Product Datasheet: ASTM A607 Grade 55 Cold-Rolled Steel Sheet & Strip** **Product Overview** ASTM A607 Grade 55 Cold-Rolled is a **premium high-strength, low-alloy (HSLA) steel sheet and strip** that delivers an exceptional balance of **55 ksi minimum yield strength**, guaranteed **atmospheric corrosion resistance**, and the superior **surface finish, dimensional accuracy, and enhanced formability** achieved through cold reduction and annealing. This grade represents the high-performance tier of formable weathering steels, designed for demanding applications where structural efficiency, durability, and excellent paintability must coexist. The mandatory copper content ensures long-term corrosion protection, making it ideal for high-value fabricated products exposed to harsh environments. It undergoes precise cold rolling followed by annealing to optimize its mechanical and surface properties. **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 **cold-rolled** condition as defined in ASTM A607. * **Type Classification:** **Type 1 (Columbium)** or **Type 2 (Vanadium)**. Denotes the primary microalloying element for grain refinement and precipitation strengthening. * **Corrosion Resistance:** Contains a **mandatory minimum copper content of 0.20%**, providing approximately **twice the atmospheric corrosion resistance** of plain carbon steel. This intrinsic property qualifies it as a true weathering steel. * **Material Condition:** Supplied in the **cold-rolled, annealed, and temper-rolled (skin passed)** condition. This process sequence ensures a fine-grained, ductile microstructure, precise thickness control, and a smooth, uniform surface ideal for high-quality finishes. **Chemical Composition (Weight % - ASTM A607 Grade 55 Requirements)** Chemistry is carefully controlled to achieve strength without compromising formability or weldability. | Element | Requirement (Max, unless noted) | Purpose & Note | | :--- | :--- | :--- | | **Carbon (C)** | 0.25% | Controlled for strength; effectively lowered in final properties by the annealing process. | | **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) | Grain refiner for Type 1. | | **Vanadium (V)** | 0.15% Max (Type 2) | Precipitation strengthener for Type 2. | | **Carbon Equivalent (C.E. IIW)** | -- | Typically 0.40 - 0.47. Good weldability, but requires more care than Grade 50. | **Physical & Mechanical Properties** | Property | Requirement (ASTM A607 Grade 55) | Advantages of Cold-Rolled & Annealed Condition | | :--- | :--- | :--- | | **Yield Strength (Min)** | 55 ksi (380 MPa) | Highly consistent across the coil due to controlled processing. | | **Tensile Strength** | 70 ksi (485 MPa) min | Typically 75 - 85 ksi (517 - 586 MPa). | | **Elongation in 2" (Min)** | 18% | **Excellent ductility for its strength level**, enabling complex forming operations. | | **Surface Finish** | **Smooth, uniform matte finish** (temper rolled). | Superior to hot-rolled; free of mill scale. Provides an optimal substrate for painting, plating, or powder coating. | | **Dimensional Tolerance & Flatness** | Conforms to **ASTM A568** for cold-rolled sheet. | **Tight tolerances and excellent flatness**, critical for precision fabrication, stamping, and assembly. | | **Atmospheric Corrosion Resistance** | ~2x that of plain carbon steel. | Integral property; offers a "self-healing" protective layer if the organic coating is damaged. | | **Key Feature** | **High-Strength, Formable, and Durable:** Uniquely combines 55 ksi yield strength with the formability of a cold-rolled, annealed product and the built-in corrosion resistance of a weathering steel, creating a top-tier material for engineered products. | **Product Applications** ASTM A607 Grade 55 cold-rolled sheet is specified for high-performance components where strength, cosmetic appearance, and environmental durability are critical. * **Automotive & Heavy Truck:** Structural safety components (e.g., seat frames, door intrusion beams), chassis reinforcements, and high-strength brackets requiring a Class A paintable surface. * **Construction & Agricultural Equipment:** Cab structures, interior reinforced panels, complex-formed guards, and exterior components subject to high stress and corrosion. * **Architectural & Building Systems:** High-performance curtain wall mullions, framing, roof panels, and facade elements where strength, flatness, and a superior painted finish are required. * **Material Handling & Storage:** High-capacity shelving and rack components, lift truck parts, and container sections needing strength and durability. * **Industrial Machinery:** Housings, covers, and structural parts for machines operating in demanding environments. * **Renewable Energy:** Components for solar panel mounting structures and wind turbine housings exposed to weather. **Advantages & Fabrication Notes** * **Excellent Weldability and Formability:** The annealing process restores ductility, making it suitable for **severe cold forming**, including deep drawing, complex stamping, and embossing. It welds well with standard processes (GMAW, GTAW, Resistance Welding), though low-hydrogen practice is advised. * **Superior Coating Performance:** The pristine, scale-free surface ensures maximum adhesion and durability of applied paints, powder coatings, and electroplatings, resulting in a finish superior to that achievable on hot-rolled steel. * **Lifecycle Value:** The synergy of a high-integrity organic coating over a corrosion-resistant substrate significantly extends service life and reduces maintenance, offering excellent long-term value despite a higher initial material cost. * **Precision Manufacturing:** Its consistent properties and dimensional accuracy improve manufacturing yields, reduce scrap, and facilitate automated fabrication and assembly processes. * **Balance of Properties:** Offers a compelling alternative to bake-hardenable or higher-cost advanced high-strength steels (AHSS) for applications where corrosion resistance is a key requirement. **Disclaimer:** This datasheet describes **ASTM A607 Grade 55 Cold-Rolled, Annealed, and Temper-Rolled** sheet and strip. For procurement, specify: **ASTM A607, Grade 55, cold-rolled, annealed, temper-rolled**. Include requirements for **surface finish** (e.g., standard matte, bright) and reference **ASTM A568** for dimensional tolerances. **Critical Distinctions:** * **vs. Hot-Rolled A607 Grade 55:** The cold-rolled version offers vastly superior surface quality, formability, and dimensional precision, enabling more complex parts and high-finish applications. * **vs. ASTM A1008 or A1011 HSLA Grades:** The key differentiator is the mandatory copper content and guaranteed atmospheric corrosion resistance of A607. * **vs. A606 Type 5 Cold-Rolled:** A606 Type 5 is a chemistry-based weathering steel with typical 55 ksi yield. A607 Grade 55 provides a **guaranteed minimum yield strength**, offering greater reliability for structural design. This material is the optimal choice for designers seeking to push the limits of part performance, durability, and aesthetic quality in challenging service environments, where its premium cost is justified by superior lifecycle performance. -:- For detailed product information, please contact sales. -: ASTM A607 Steel, grade 55, cold rolled Specification Dimensions Size： Diameter 20-1000 mm Length <4725 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, cold rolled Properties -:- For detailed product information, please contact sales. -:

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

Packing of ASTM A607 Steel Seamless tube, grade 55, cold 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 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 1196 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