ASTM A27 Grade 70-36 Cast Carbon Steel Foil/Strip

ASTM A27 Grade 70-36 Cast Carbon Steel Foil Product Information -:- For detailed product information, please contact sales. -: ASTM A27 Grade 70-36 Cast Carbon Steel Foil Synonyms -:- For detailed product information, please contact sales. -:

ASTM A27 Grade 70-36 Cast Carbon Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Datasheet: ASTM A27 Grade 70-36 Cast Carbon Steel** ## **1. Product Overview** **ASTM A27 Grade 70-36** is a medium-strength **cast carbon steel** within the widely recognized A27 specification for general-purpose steel castings. Its designation reflects its minimum tensile strength of 70 ksi and yield strength of 36 ksi. This grade offers an improved balance of strength and ductility compared to lower-grade A27 materials, making it suitable for structural components subjected to moderate-to-high static loads and mild dynamic stresses in ambient temperature environments. It provides a cost-effective solution where higher load-bearing capacity is required without the need for low-temperature toughness or corrosion resistance. ## **2. International Standards & Designations** | System/Authority | Designation | Specification Title | | :--- | :--- | :--- | | **ASTM** | **A27/A27M** | Standard Specification for Steel Castings, Carbon, for General Application | | **Grade** | **70-36 (Grade U-60)** | Standard Grade within A27 | | **UNS** | J03002 | Unified Numbering System | | **ASME** | SA-27 | ASME Boiler and Pressure Vessel Code adoption (when specified) | | **ISO** | ISO 3755:2024 Grade 250-480 | Approximate international equivalent | | **EN** | EN 10293 GP240GR | Comparable European designation for general engineering castings | | **Common Names** | A27-70-36, Cast Steel 70-36, Medium-High Strength Carbon Cast Steel | ## **3. Chemical Composition (% by Weight)** Grade 70-36 maintains controlled chemistry that enables its enhanced mechanical properties while preserving good castability and weldability. | Element | ASTM A27 Grade 70-36 Requirements | Typical Composition Range | | :--- | :--- | :--- | | **Carbon (C)** | 0.35% max | 0.28 - 0.33 | | **Manganese (Mn)** | 0.70% min | 0.80 - 1.00 | | **Phosphorus (P)** | 0.05% max | 0.030 - 0.040 | | **Sulfur (S)** | 0.06% max | 0.030 - 0.040 | | **Silicon (Si)** | 0.60% max | 0.25 - 0.45 | | **Residual Elements** | Not individually specified | Cr ≤ 0.35%, Ni ≤ 0.35%, Mo ≤ 0.15%, Cu ≤ 0.35% | | **Iron (Fe)** | Balance | Balance | **Note:** The chemical composition is not the primary acceptance criterion. Mechanical properties govern acceptance, allowing foundries to adjust chemistry within specified limits to achieve required strength in different casting sections. ## **4. Mechanical & Physical Properties** Properties are determined from separately cast test bars and represent minimum requirements as per ASTM A27. | Property | ASTM A27 Minimum Requirement | Typical Achieved Range | Test Standard | | :--- | :--- | :--- | :--- | | **Standard Condition** | As-cast or Heat-Treated | Usually as-cast or stress-relieved | -- | | **Tensile Strength** | **485 MPa (70,000 psi)** min | 500 - 600 MPa (73 - 87 ksi) | ASTM A370 | | **Yield Strength** | **250 MPa (36,000 psi)** min | 275 - 350 MPa (40 - 51 ksi) | ASTM A370 | | **Elongation (in 50mm/2")** | **20%** min | 22% - 28% | ASTM A370 | | **Reduction of Area** | **28%** min | 30% - 40% | ASTM A370 | | **Hardness (Brinell)** | Not specified | 170 - 220 HBW | ASTM E10 | | **Impact Toughness** | Not specified (unless Supplementary Requirement S1 is invoked) | Moderate at room temperature; decreases significantly below 0°C | ASTM A370 | | **Modulus of Elasticity** | -- | 200 GPa (29 × 10⁶ psi) | -- | | **Shear Modulus** | -- | 77 GPa (11.2 × 10⁶ psi) | -- | | **Density** | -- | 7.85 g/cm³ (0.284 lb/in³) | -- | | **Thermal Conductivity** | -- | 50-52 W/m·K (at 100°C) | -- | | **Coefficient of Thermal Expansion** | -- | 12.0 × 10⁻⁶ /°C (20-100°C) | -- | ## **5. Key Characteristics & Advantages** * **Enhanced Load-Bearing Capacity:** Offers approximately 15-20% higher yield strength than Grade 60-30, enabling lighter designs or higher safety factors. * **Good Structural Integrity:** Maintains sufficient ductility (20%+ elongation) to withstand moderate deformation without brittle fracture. * **Economic Viability:** Provides higher strength at minimal cost premium compared to alloy cast steels for many applications. * **Adequate Weldability:** Can be welded using standard arc welding processes with proper procedure (low-hydrogen electrodes, controlled preheat). * **Machinability:** Offers acceptable machinability in as-cast or normalized condition, though harder than lower-grade A27 materials. * **Foundry Flexibility:** Chemistry ranges allow foundries to optimize melting practices for specific casting geometries. ## **6. Primary Applications** ASTM A27 Grade 70-36 is extensively used in heavy industrial sectors where robust, dependable cast components are required. * **Construction & Mining Equipment:** Crusher jaws (secondary), dipper teeth adapters, shovel brackets, track system components, and heavy machinery bases. * **Material Handling:** Crane hooks (non-forged), sheave wheels, conveyor pulleys, and heavy-duty gear blanks. * **Railroad Components:** Coupler knuckles (where specified), draft yokes, and freight car structural members. * **Industrial Machinery:** Press frames, rolling mill housings, large valve bodies for non-critical service, and hydraulic cylinder mounts. * **Marine & Offshore:** Windlass components, fairleads, towing pins, and deck machinery castings. * **Agricultural Equipment:** Plow frames, cultivator brackets, and heavy-duty implement components. * **General Engineering:** Large industrial gears, sprockets, and machinery components requiring moderate wear resistance with good strength. ## **7. Processing & Fabrication Guidelines** * **Heat Treatment Options:** * **Stress Relieving:** Recommended (595-650°C / 1100-1200°F) to minimize residual casting stresses, especially for complex geometries. * **Normalizing:** (900-925°C / 1650-1700°F) improves homogeneity and may enhance mechanical properties. * **Normalize & Temper:** Provides optimal combination of strength and toughness for demanding applications. * **Machining Recommendations:** * Use carbide-tipped tools for better tool life. * Recommended cutting speed: 60-90 m/min (200-300 SFM) with carbide tools. * Maintain positive rake angles and adequate chip clearance. * For heavy cuts, use ample coolant to manage heat generation. * **Welding Procedures:** * **Preheat:** 150-200°C (300-400°F) recommended for sections >25mm thickness. * **Electrodes:** Low-hydrogen type (AWS E7018, E7018-1). * **Interpass Temperature:** Maintain 150-200°C (300-400°F). * **Post-Weld:** Stress relieve at 595-650°C (1100-1200°F) for critical applications. * **Welding Processes:** SMAW, GMAW, FCAW with appropriate filler metals. * **Surface Treatments:** * Suitable for most industrial coatings including painting, galvanizing, and metalizing. * Can be flame or induction hardened on wear surfaces. * Hardfacing overlays can be applied for enhanced wear resistance. ## **8. Limitations & Design Considerations** * **Temperature Limitations:** Not suitable for low-temperature service (<0°C/32°F) without impact testing qualification. * **Not Pressure-Rated:** Not recommended for pressure-containing applications; use A216 WCB instead. * **Section Sensitivity:** Mechanical properties vary with casting section thickness; heavier sections show reduced ductility. * **Corrosion Resistance:** Limited; requires protective coatings for corrosive environments. * **Fatigue Strength:** Moderate; not recommended for high-cycle fatigue applications without proper design considerations. ## **9. Quality Assurance & Testing** * **Certification Requirements:** Material must be supplied with test reports showing compliance with chemical and mechanical requirements. * **Test Specimens:** From separately cast keel blocks per ASTM A781. * **Optional Supplementary Tests:** * S1 - Charpy Impact Test * S4 - Additional Tension Tests * S5 - Hardness Test * S6 - Heat Treatment * S10 - Carbon Equivalent ## **10. Comparative Analysis with Other A27 Grades** | Property | Grade 60-30 | **Grade 70-36** | Grade 65-35 | | :--- | :--- | :--- | :--- | | **Tensile Min (MPa)** | 415 | **485** | 450 | | **Yield Min (MPa)** | 205 | **250** | 240 | | **Elongation Min** | 24% | **20%** | 22% | | **Typical Carbon** | 0.20-0.25 | **0.28-0.33** | 0.25-0.30 | | **Primary Use** | Light structural | **Medium-heavy structural** | General structural | --- **Disclaimer:** This technical datasheet provides general information for reference only. For complete specifications and requirements, consult the latest edition of **ASTM A27/A27M**. Final material selection should be based on specific application requirements, and engineering analysis should be performed by qualified personnel. Always verify actual material properties with the supplier before final design implementation. -:- For detailed product information, please contact sales. -: ASTM A27 Grade 70-36 Cast Carbon Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6404 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 A27 Grade 70-36 Cast Carbon Steel Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A27 Grade 70-36 Cast Carbon Steel Foil -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A27 Grade 70-36 Cast Carbon Steel Foil -:- For detailed product information, please contact sales. -:

Packing of ASTM A27 Grade 70-36 Cast Carbon Steel Foil/Strip -:- 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 Foil/Strip 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 2875 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