Cast Stainless Steel 440A, ASTM A276, Cold Rolled

Cast Stainless Steel 440A, ASTM A276, Cold Rolled Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel 440A, ASTM A276, Cold Rolled Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel 440A, ASTM A276, Cold Rolled Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: Stainless Steel 440A (ASTM A276), Cold Rolled** #### **1. Product Overview** Stainless Steel 440A is a martensitic stainless steel supplied in cold-rolled condition under ASTM A276 specification. The cold rolling process enhances surface finish, dimensional accuracy, and mechanical properties through strain hardening. This material offers an excellent combination of good corrosion resistance, high strength, and wear resistance, making it suitable for precision applications requiring tight tolerances and superior surface quality. **Key Advantages:** - **Superior Surface Finish:** Excellent surface quality and dimensional precision - **Enhanced Mechanical Properties:** Cold working increases strength and hardness - **Good Corrosion Resistance:** Better corrosion resistance than carbon steels - **High Wear Resistance:** Suitable for demanding applications - **Close Tolerances:** Maintains precise dimensions for critical components --- #### **2. International Standard** This product conforms to the latest edition of: - **ASTM A276/A276M:** Standard Specification for Stainless Steel Bars and Shapes Additional applicable standards: - **ASTM A480/A480M:** General requirements for flat rolled stainless steel - **AMS 5632:** Aerospace material specification - **ISO 683-15:** Stainless steels for general purposes --- #### **3. Chemical Composition (Heat Analysis, %)** The chemical composition is controlled to ensure consistent hardening response and corrosion resistance. | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.60-0.75 | | Manganese (Mn), max | 1.00 | | Silicon (Si), max | 1.00 | | Phosphorus (P), max | 0.04 | | Sulfur (S), max | 0.03 | | Chromium (Cr) | 16.00-18.00 | | Molybdenum (Mo), max | 0.75 | *Note: Cold-rolled products typically have tighter composition control to ensure consistent work hardening response.* --- #### **4. Mechanical Properties (Cold Rolled Condition)** Mechanical properties in cold-rolled condition vary with the amount of cold work reduction. **¼ Hard Condition:** - **Tensile Strength:** 860-1000 MPa (125-145 ksi) - **Yield Strength (0.2% Offset):** 690 MPa (100 ksi) min - **Elongation:** 12% min - **Hardness:** 269-302 HBW **½ Hard Condition:** - **Tensile Strength:** 1030-1160 MPa (150-168 ksi) - **Yield Strength (0.2% Offset):** 860 MPa (125 ksi) min - **Elongation:** 10% min - **Hardness:** 302-331 HBW **Full Hard Condition:** - **Tensile Strength:** 1240 MPa (180 ksi) min - **Yield Strength (0.2% Offset):** 965 MPa (140 ksi) min - **Elongation:** 5% min - **Hardness:** 375-401 HBW --- #### **5. Physical Properties (Typical Values)** - **Density:** 7.78 g/cm³ (0.281 lb/in³) - **Modulus of Elasticity:** 200 GPa (29,000 ksi) - **Poisson's Ratio:** 0.27-0.30 - **Thermal Conductivity:** 24.2 W/m·K (at 100°C) - **Electrical Resistivity:** 0.60 μΩ·m - **Coefficient of Thermal Expansion:** 10.2 × 10⁻⁶/°C (20-100°C) - **Magnetic Permeability:** Strongly magnetic --- #### **6. Heat Treatment** **Annealing after Cold Rolling:** - Process: Heat to 815-845°C (1500-1550°F) - Soak: 2-4 hours per inch of thickness - Cooling: Furnace cool to 600°C (1100°F), then air cool **Hardening:** - Austenitizing: 1010-1065°C (1850-1950°F) - Quenching: Oil quench preferred - Tempering: 150-370°C (300-700°F) for 1-2 hours --- #### **7. Product Applications** Cold-rolled 440A stainless steel is used in applications requiring precision dimensions, good surface finish, and high strength. **Primary Applications Include:** - **Precision Instruments:** Surgical tools, dental instruments, and measuring devices - **Cutting implements:** High-quality knives, blades, and cutting tools - **Bearing Components:** Precision balls, rollers, and races - **Valve Parts:** Valve trim, seats, and stems - **Shafting and Pins:** Precision shafts, axles, and pivot pins - **Mold Components:** Injection mold cores and cavities --- #### **8. Fabrication Characteristics** **Machining:** - Best machined in annealed condition - Use positive rake tools with rigid setups - Recommended speeds: 20-30 m/min (65-100 SFM) - Adequate coolant required to prevent work hardening **Forming:** - Limited formability in cold-rolled condition - Severe forming requires intermediate annealing - Bend radius: 2-3 times material thickness **Grinding:** - Use aluminum oxide or silicon carbide wheels - Light passes with ample coolant - Avoid excessive heat generation --- #### **9. Surface Quality & Finishes** Cold-rolled 440A is available in various surface finishes: - **2B Finish:** Bright cold-rolled finish - **BA Finish:** Bright annealed finish - **No. 3 Finish:** Intermediate polished finish - **No. 4 Finish:** Standard polished finish - **No. 7 Finish:** High luster reflective finish - **No. 8 Finish:** Mirror finish --- #### **10. Quality Assurance** - **Dimensional Tolerance:** Meets ASTM A480 requirements - **Surface Inspection:** Visual and automated surface scanning - **Chemical Analysis:** Ladle and product analysis - **Mechanical Testing:** Tensile, hardness, and bend tests - **Certification:** Mill test certificate to ASTM A276 requirements --- **Disclaimer:** This technical datasheet provides general information for reference purposes only. Cold-rolled 440A stainless steel requires proper handling and processing to maintain its properties. Always consult the complete ASTM standards and qualified materials engineers for specific applications. The cold-rolled condition may require stress relieving or annealing before further fabrication to prevent cracking or distortion. -:- For detailed product information, please contact sales. -: Cast Stainless Steel 440A, ASTM A276, Cold Rolled Specification Dimensions Size： Diameter 20-1000 mm Length <4162 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. -: Cast Stainless Steel 440A, ASTM A276, Cold Rolled Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel 440A, ASTM A276, Cold Rolled -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel 440A, ASTM A276, Cold Rolled -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel 440A, ASTM A276, 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 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 633 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