ASTM A709 Steel Tube,Pipe, grade 36

ASTM A709 Steel Tube, grade 36, carbon Steel Tube bar (diam ≤ 200 mm) Product Information -:- For detailed product information, please contact sales. -: ASTM A709 Steel Tube, grade 36, carbon Steel Tube bar (diam ≤ 200 mm) Synonyms -:- For detailed product information, please contact sales. -:

ASTM A709 Steel, grade 36, carbon steel bar (diam ≤ 200 mm) Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A709 Grade 36 Carbon Steel Bar (Diameter ≤ 200 mm)** **ASTM A709 Grade 36** is a structural carbon steel bar specifically designed for bridge construction applications, offering a minimum yield strength of **36 ksi (250 MPa)**. As part of the comprehensive A709 specification for bridge steels, Grade 36 provides reliable performance in structural components where durability and weldability are essential. The **diameter limitation of ≤ 200 mm** ensures consistent mechanical properties throughout the cross-section, making it suitable for critical load-bearing applications in bridge engineering. --- #### **1. International Standards & Grades** **Primary Standard:** **ASTM A709/A709M** - "Standard Specification for Structural Steel for Bridges" **Grade Classification:** - **Grade 36** - Minimum yield strength 36 ksi (250 MPa) - Other grades in A709 series: 50, 50W, HPS 50W, 70W, HPS 70W, 100, 100W **International Equivalents:** - **EN 10025-2**: S275JR/S275J0 - **JIS G3106**: SM490 - **GB/T 714**: Q345q - **ISO 630-2**: E275C --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A709 Grade 36 bars (≤ 200 mm): | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.25 | | Manganese (Mn) | 0.80-1.20 | | Phosphorus (P) | 0.04 | | Sulfur (S) | 0.05 | | Silicon (Si) | 0.40 | | Copper (Cu) | 0.20 (min. for atmospheric corrosion resistance) | **Key Composition Features:** - **Controlled Carbon**: Balances strength and weldability - **Enhanced Manganese**: Provides solid solution strengthening - **Copper Requirement**: Minimum 0.20% for improved corrosion resistance - **Bridge-Quality Chemistry**: Optimized for structural integrity --- #### **3. Physical & Mechanical Properties** **Mechanical Properties (for diameters ≤ 200 mm):** | Property | Value | |---|---| | **Tensile Strength** | 400-550 MPa (58-80 ksi) | | **Yield Strength (min.)** | 250 MPa (36 ksi) | | **Elongation in 2" (min.)** | 20% | | **Elongation in 8" (min.)** | 23% | | **Reduction of Area (min.)** | 40% | **Impact Toughness Properties:** - **Charpy V-Notch Test Temperature**: 70°F (21°C) - **Minimum Impact Energy**: 20 ft-lbf (27 J) **Physical Properties:** - **Density**: 7.85 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 200 GPa (29,000 ksi) - **Poisson's Ratio**: 0.29 - **Thermal Conductivity**: 51.9 W/m·K - **Coefficient of Thermal Expansion**: 11.7 × 10⁻⁶/°C --- #### **4. Product Applications** **Bridge Construction:** - Main girders and stringers - Bridge deck supports - Truss members and connections - Bearing components **Structural Components:** - Pin and hanger assemblies - Rocker and roller bearings - Expansion joint supports - Bridge railing systems **Civil Engineering:** - Heavy construction fasteners - Structural connection plates - Anchor bolts and rods - Foundation reinforcement **Transportation Infrastructure:** - Sign support structures - Overhead gantry components - Tunnel support systems - Retaining wall reinforcements **Marine Structures:** - Pier and dock components - Waterfront structure members - Lock and dam equipment - Coastal protection elements --- #### **5. Fabrication Characteristics** **Machining Performance:** - **Good Machinability**: 60-65% of B1112 steel - **Turning Operations**: Suitable for all standard processes - **Threading Capability**: Excellent for structural threading - **Surface Finish**: Good with proper tool geometry **Welding Characteristics:** - **Excellent Weldability**: All common processes applicable - **Preheat Requirements**: Generally not required for diameters ≤ 200 mm - **Recommended Processes**: SMAW, GMAW, FCAW - **Filler Metals**: E70XX series electrodes **Heat Treatment:** - Typically supplied as-rolled or normalized - Stress relieving available when specified - No quenching and tempering required **Quality Assurance:** - **Chemical Analysis**: Heat certification required - **Mechanical Testing**: Tensile and impact tests mandatory - **Non-Destructive Testing**: UT, MT, or PT as specified - **Dimensional Inspection**: Full compliance with specified tolerances --- ### **Technical Summary** ASTM A709 Grade 36 carbon steel bars in diameters up to 200 mm represent a reliable and cost-effective solution for bridge construction and structural applications. The controlled chemical composition and guaranteed mechanical properties ensure consistent performance in critical load-bearing components. The material's excellent weldability and machinability make it particularly suitable for fabricating complex structural connections and custom components. The diameter limitation of ≤ 200 mm ensures uniform properties throughout the cross-section, providing engineers with confidence in structural calculations and design assumptions. The mandatory copper content enhances atmospheric corrosion resistance, contributing to long-term durability in bridge applications. As a bridge-quality material, ASTM A709 Grade 36 undergoes rigorous testing and certification, ensuring compliance with the highest standards of structural integrity. Its proven performance in transportation infrastructure, combined with its fabrication versatility, makes it a preferred choice for engineers designing durable and reliable bridge components where safety and longevity are paramount considerations. -:- For detailed product information, please contact sales. -: ASTM A709 Steel, grade 36, carbon steel bar (diam ≤ 200 mm) Specification Dimensions Size： Diameter 20-1000 mm Length <4315 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 A709 Steel, grade 36, carbon steel bar (diam ≤ 200 mm) Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A709 Steel Tube, grade 36, carbon Steel Tube bar (diam ≤ 200 mm) -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A709 Steel Tube, grade 36, carbon Steel Tube bar (diam ≤ 200 mm) -:- For detailed product information, please contact sales. -:

Packing of ASTM A709 Steel Tube, grade 36, carbon Steel Tube bar (diam ≤ 200 mm) -:- 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 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 786 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