Bethlehem Steel Wire ASTM A633, Steel Wire

Bethlehem Steel Wire ASTM A633 Grade A 3/16 to 2-1/2 in. thick, Steel Wire plate Product Information -:- For detailed product information, please contact sales. -: Bethlehem Steel Wire ASTM A633 Grade A 3/16 to 2-1/2 in. thick, Steel Wire plate Synonyms -:- For detailed product information, please contact sales. -:

Bethlehem Steel ASTM A633 Grade A 3/16 to 2-1/2 in. thick, steel plate Product Information -:- For detailed product information, please contact sales. -: ## **Product Specification: Bethlehem Steel ASTM A633 Grade A Normalized High-Strength Low-Alloy Steel Plate (3/16" to 2-1/2" Thick)** **Product Overview** Bethlehem Steel ASTM A633 Grade A is a normalized high-strength low-alloy (HSLA) structural steel plate designed for applications requiring enhanced notch toughness at lower temperatures. As part of the A633 specification, Grade A provides a minimum yield strength of 42 ksi (290 MPa) with guaranteed impact properties, making it superior to standard structural grades like A36 in applications involving dynamic loading or service in cold environments. Supplied in the normalized condition for thicknesses from 3/16 inch (4.8 mm) to 2-1/2 inches (63.5 mm), this steel offers an excellent balance of strength, weldability, and verified toughness, particularly suited for welded structures operating under demanding conditions. **International Standard Compliance** * **Primary Standard:** **ASTM A633 / A633M** - Standard Specification for Normalized High-Strength Low-Alloy Structural Steel Plates * **Grade Designation:** Grade A * **International Equivalents:** * **EN Standard:** EN 10025-3 S275N or S275NL (Normalized/Normalized rolled weldable fine grain structural steels) * **ISO Standard:** ISO 630-2 E275B (Non-alloy quality structural steel) * **JIS Standard:** G3106 SM400A or SM400B (General structural rolled steel) * **Related Specifications:** ASME SA633 (for pressure vessel applications) * **Certification:** Typically supplied with full traceability; suitable for CE marking under Construction Products Regulation **Chemical Composition (Heat Analysis, Weight %)** The composition is controlled to produce fine grain structure and achieve specified mechanical properties after normalizing heat treatment. | Element | ASTM A633 Grade A Requirement | Typical Bethlehem Practice | Functional Purpose | |---------|-------------------------------|----------------------------|-------------------| | Carbon (C) | 0.18% max | 0.10-0.16% | Base strength element, controlled for weldability | | Manganese (Mn) | 1.00-1.35% | 1.10-1.30% | Primary strengthening element, improves hardenability | | Phosphorus (P) | 0.035% max | 0.010-0.020% | Controlled impurity, minimized for toughness | | Sulfur (S) | 0.040% max | 0.005-0.015% | Controlled impurity, minimized for weldability | | Silicon (Si) | 0.15-0.50% | 0.20-0.40% | Deoxidizer, solid solution strengthener | | Copper (Cu) | 0.20% min (when specified) | 0.20-0.35% | Optional for corrosion resistance | | Vanadium (V) | 0.05% max | 0.02-0.04% (optional) | Grain refinement, precipitation strengthening | | Columbium (Cb/Nb) | 0.05% max | 0.01-0.03% (optional) | Grain refinement, precipitation strengthening | | Aluminum (Al) | 0.01-0.05% (when specified) | 0.020-0.040% | Grain refiner (fine grain practice) | | **Carbon Equivalent (CE IIW)** | **0.40 max** | **0.30-0.38** | CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15 | *Note: A633 Grade A is typically produced with fine grain practice using aluminum or other grain-refining elements.* **Physical & Mechanical Properties** **1. Standard Mechanical Properties (After Normalizing):** - **Yield Strength (min):** 42 ksi (290 MPa) - **Tensile Strength:** 63-85 ksi (435-585 MPa) - **Yield-to-Tensile Ratio:** 0.60-0.70 - **Elongation in 2" (min):** 23% - **Elongation in 8" (min):** 21% - **Reduction of Area (typical):** 50-60% **2. Impact Properties (Key Differentiator):** - **Charpy V-Notch Requirements:** Mandatory testing specified by purchaser - **Typical Test Conditions:** 15-20 ft-lb (20-27 J) at -50°F (-46°C) to +70°F (+21°C) - **Test Temperatures Available:** +70°F (+21°C), 0°F (-18°C), -30°F (-34°C), -50°F (-46°C) - **Typical Performance:** 40-60 ft-lb (54-81 J) at 0°F (-18°C) **3. Physical Constants:** - **Density:** 0.284 lb/in³ (7.85 g/cm³) - **Modulus of Elasticity:** 29,000 ksi (200 GPa) - **Shear Modulus:** 11,500 ksi (79 GPa) - **Poisson's Ratio:** 0.29 - **Coefficient of Thermal Expansion:** 6.5 × 10⁻⁶/°F (11.7 × 10⁻⁶/°C) from 68-212°F - **Thermal Conductivity:** 28.0 BTU·in/(hr·ft²·°F) at 212°F - **Specific Heat:** 0.11 BTU/(lb·°F) **4. Technological Properties:** - **Weldability:** Excellent (AWS D1.1 Group I comparable) - **Carbon Equivalent:** 0.30-0.38 (very favorable for welding) - **Preheat Requirements:** Generally not required for thicknesses < 1" under normal conditions - **Machinability:** 70% of B1112 (good) - **Formability:** Excellent; minimum bend radius of 1.5t for 90° bending - **Flame Cutting:** Excellent performance with minimal hard zone formation **5. Microstructural Characteristics:** - **Grain Size:** ASTM 5-8 (fine grain practice) - **Microstructure:** Ferrite-pearlite with possible bainitic transformation products - **Inclusion Control:** Typically produced to moderate cleanliness standards **Product Applications** **1. Structural Engineering:** - Bridge components in cold climates - Building frames for high-rise structures - Transmission towers and utility structures - Crane runway girders and support structures **2. Heavy Equipment & Machinery:** - Excavator and crane components - Mining equipment structural members - Agricultural machinery frames - Material handling equipment **3. Transportation:** - Railroad car components - Truck chassis and trailer frames - Heavy transport equipment **4. Industrial Applications:** - Pressure vessel supports (non-pressure parts) - Industrial platform and walkway structures - Storage tank supports - Power plant structural components **5. Cold Climate Applications:** - Arctic and subarctic structures - Cold storage facility structures - Winterized industrial equipment - Ice-breaking vessel components (non-hull) **Normalizing Heat Treatment Process** The normalized condition is essential for achieving the specified properties: 1. **Heating:** Uniform heating to 1600-1700°F (870-925°C) 2. **Soaking:** Holding at temperature to achieve uniform austenitization 3. **Cooling:** Still-air cooling to room temperature 4. **Result:** Refined grain structure, uniform microstructure, improved toughness **Manufacturing & Processing Characteristics** **1. Available Conditions:** - **Normalized:** Standard delivery condition (required by specification) - **As-Rolled:** Not permitted for A633 Grade A - **Stress Relieved:** Available when specified **2. Dimensional Tolerances:** - **Thickness Tolerance:** Per ASTM A6/A6M for normalized plates - **Width Range:** Up to 150 inches - **Length Range:** Up to 600 inches - **Flatness:** Commercial or structural quality **3. Quality Assurance:** - **Mandatory Testing:** Tensile and Charpy impact tests per heat - **Optional Testing:** Ultrasonic testing per ASTM A435/A435M - **Grain Size Testing:** Typically verified per ASTM E112 - **Documentation:** Full traceability with heat number and test reports **4. Processing Recommendations:** - **Cutting:** All thermal cutting methods suitable - **Forming:** Excellent cold forming characteristics - **Welding:** All common processes suitable with matching filler metals - **Heat Treatment:** Avoid post-fabrication heating above 1150°F (620°C) **Comparative Advantages** 1. **Superior Toughness:** Verified impact properties exceed standard structural grades 2. **Excellent Weldability:** Low carbon equivalent facilitates welding without extensive precautions 3. **Uniform Properties:** Normalizing ensures consistent properties through thickness 4. **Good Strength-Ductility Balance:** Higher strength than A36 with maintained formability 5. **Cold Temperature Performance:** Specifically designed for low-temperature service 6. **Code Acceptance:** Widely recognized in structural and pressure vessel codes **Technical Considerations** 1. **Thickness Limitations:** Standard properties guaranteed only to 2-1/2" thickness 2. **Heat Treatment Required:** Must be supplied in normalized condition 3. **Cost Premium:** Higher cost than as-rolled structural grades due to heat treatment 4. **Lead Time:** Longer delivery times possible due to heat treatment requirements **Procurement Specifications** When ordering A633 Grade A, specify: - ASTM A633 Grade A - Thickness, width, and length requirements - Charpy test temperature and energy requirements - Additional testing requirements (UT, MT, etc.) - Heat treatment verification requirements - Certification requirements (EN 10204 3.1 or 3.2) - Marking and packaging instructions **Design Advantages** 1. **Weight Savings:** Higher strength allows lighter structures than A36 2. **Improved Safety:** Verified toughness reduces brittle fracture risk 3. **Fabrication Efficiency:** Excellent weldability reduces fabrication costs 4. **Long-Term Reliability:** Normalized structure provides stability over time 5. **Versatility:** Suitable for wide range of structural applications **Disclaimer** This product information is based on ASTM specifications and historical industry data. Actual properties may vary by manufacturer and heat lot. For critical applications, always consult certified mill test reports and conduct appropriate engineering evaluations. Bethlehem Steel Corporation historical data is referenced for informational purposes; current producers may have different manufacturing practices while meeting ASTM A633 Grade A requirements. Always adhere to applicable codes and standards for design, fabrication, and installation. -:- For detailed product information, please contact sales. -: Bethlehem Steel ASTM A633 Grade A 3/16 to 2-1/2 in. thick, steel plate Specification Dimensions Size： Diameter 20-1000 mm Length <4644 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. -: Bethlehem Steel ASTM A633 Grade A 3/16 to 2-1/2 in. thick, steel plate Properties -:- For detailed product information, please contact sales. -:

Applications of Bethlehem Steel Wire ASTM A633 Grade A 3/16 to 2-1/2 in. thick, Steel Wire plate -:- For detailed product information, please contact sales. -: Chemical Identifiers Bethlehem Steel Wire ASTM A633 Grade A 3/16 to 2-1/2 in. thick, Steel Wire plate -:- For detailed product information, please contact sales. -:

Packing of Bethlehem Steel Wire ASTM A633 Grade A 3/16 to 2-1/2 in. thick, Steel Wire plate -:- 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 Wire 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 1115 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