ASTM A690 HSLA Steel Capillary

ASTM A690 HSLA Steel Capillary, Thickness < 100 mm (4 in.) Product Information -:- For detailed product information, please contact sales. -: ASTM A690 HSLA Steel Capillary, Thickness < 100 mm (4 in.) Synonyms -:- For detailed product information, please contact sales. -:

ASTM A690 HSLA Steel, Thickness < 100 mm (4 in.) Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: ASTM A690 High-Strength Low-Alloy Steel Plate for Marine Piling** **ASTM A690** is a **High-Strength Low-Alloy (HSLA) steel** specifically formulated for **unpainted marine piling and other structures exposed to tidal and seawater splash zone conditions**. Its defining characteristic is a chemistry designed to promote the formation of a dense, adherent protective rust layer in the marine environment, significantly reducing the corrosion rate compared to conventional carbon steels. This material is **not a stainless or clad steel**, but rather a cost-effective solution offering **atmospheric corrosion resistance up to four times greater than that of plain carbon steel** in marine atmospheres. The specification includes thickness-based classifications for mechanical properties. This introduction focuses on the **most commonly used category: plates with a thickness of less than 100 mm (4 inches)**. --- ## **International Standard & Key Specifications** * **Primary Standard:** **ASTM A690 / A690M** - Standard Specification for High-Strength Low-Alloy Steel H-Piles and Sheet Piling for Marine Use. * **Governing Standard:** While primarily for piles, the plate product form for fabrication adheres to this specification's chemical and mechanical requirements. * **Related Specifications:** * **ASTM A6/A6M:** Standard Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling. Governs general delivery and testing requirements. * **AWS D1.1:** Structural Welding Code – Steel. --- ## **Chemical Composition (Weight %, max unless range is specified)** The composition is critical for achieving the desired atmospheric corrosion resistance. Typical ranges for thickness < 100mm are shown below. | Element | Composition (%) | Role in Performance | | :--- | :--- | :--- | | **Carbon (C)** | ≤ 0.19 | Controls strength and weldability. | | **Manganese (Mn)** | 0.80 - 1.35 | Strengthens and aids in deoxidation. | | **Phosphorus (P)** | 0.04 | Enhances atmospheric corrosion resistance. | | **Sulfur (S)** | 0.05 | Impurity, kept low for weldability. | | **Silicon (Si)** | 0.15 - 0.40 | Deoxidizer, strengthens. | | **Copper (Cu)** | **0.20 - 0.40** | **Primary element for corrosion resistance.** | | **Nickel (Ni)** | **0.25 - 0.50** | **Synergistically enhances Cu's corrosion resistance, improves toughness.** | | **Chromium (Cr)** | 0.40 - 0.70 | Contributes to corrosion resistance and hardenability. | | **Vanadium (V)** | 0.02 - 0.10 | Grain refiner, strengthens via precipitation. | *The specific combination of Cu, Ni, Cr, and P is what classifies this as a "weathering" steel for marine environments.* --- ## **Typical Physical & Mechanical Properties (Thickness < 100 mm / 4 in.)** | Property | Value / Description | | :--- | :--- | | **Tensile Strength** | 485 - 620 MPa (70,300 - 90,000 psi) | | **Yield Strength (min)** | **345 MPa (50,000 psi)** | | **Elongation in 2-in (50 mm) (min)** | 19% | | **Modulus of Elasticity** | ~200 GPa (29 x 10⁶ psi) | | **Density** | ~7.85 g/cm³ (0.284 lb/in³) | | **Charpy V-Notch Impact Toughness** | Often specified at **0°F (-18°C)**. Typical requirement: **15 ft·lbf (20 J) minimum avg.** | | **Atmospheric Corrosion Resistance** | Estimated to be **2-4x greater than plain carbon steel** in marine splash/tidal zones. | --- ## **Product Applications** ASTM A690 is **the industry-standard material** for marine structures where long-term durability with minimal maintenance is required, and painting is either impractical or undesired. **Primary Applications:** 1. **Marine Piling:** * **H-Piles** and **Sheet Piles** for docks, wharves, piers, and bulkheads. * Foundation piles for bridges, offshore platforms, and coastal structures. 2. **Splash Zone & Tidal Zone Structures:** * Unpainted support braces, wales, and fender systems in marinas. * Components of seawater intake and outfall structures. * Sea walls and revetments. 3. **Fabricated Marine Components:** * Clamps, connectors, and other fittings for permanent marine installations. * Support structures for navigation aids. --- ## **Advantages and Critical Considerations** * **Advantages:** * **Superior Marine Corrosion Resistance:** The core benefit, leading to dramatically extended service life and reduced lifecycle costs. * **Elimination of Painting Costs:** No need for initial painting or costly repainting in highly aggressive, hard-to-access splash zones. * **High Strength:** 50 ksi min yield strength allows for robust, yet efficient structural designs. * **Proven Performance:** Decades of successful use in ports and harbors worldwide. * **Critical Considerations for Fabrication & Use:** * **Not for Continuous Immersion:** It is **NOT** recommended for permanently submerged sections. Corrosion rates underwater can be similar to carbon steel. It is optimized for the wet/dry cyclic conditions of the tidal and splash zone. * **Patina Formation:** The protective rust layer ("patina") takes 1-3 years to fully stabilize. Initial runoff may stain surrounding water or concrete. * **Special Welding Requirements:** Requires low-hydrogen welding practices (E7018 electrodes, etc.) to prevent cracking. Welds themselves are not corrosion-resistant and may require specific detailing or protection. * **Galvanic Corrosion:** Must be isolated from dissimilar metals like stainless steel or copper alloys to prevent accelerated corrosion. **In summary, ASTM A690 (t < 100mm) is a specialized, cost-effective HSLA weathering steel engineered for longevity in the harsh, cyclic conditions of marine atmospheres. It is the material of choice for engineers designing durable, low-maintenance marine infrastructure where the structure is intended to develop a protective rust patina.** -:- For detailed product information, please contact sales. -: ASTM A690 HSLA Steel, Thickness < 100 mm (4 in.) Specification Dimensions Size： Diameter 20-1000 mm Length <4515 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 A690 HSLA Steel, Thickness < 100 mm (4 in.) Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A690 HSLA Steel Capillary, Thickness < 100 mm (4 in.) -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A690 HSLA Steel Capillary, Thickness < 100 mm (4 in.) -:- For detailed product information, please contact sales. -:

Packing of ASTM A690 HSLA Steel Capillary, Thickness < 100 mm (4 in.) -:- 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 Capillary 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 986 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