AISI 1021 Steel Tube,Pipe

AISI 1021 Steel Tube, cold drawn Product Information -:- For detailed product information, please contact sales. -: AISI 1021 Steel Tube, cold drawn Synonyms -:- For detailed product information, please contact sales. -:

AISI 1021 Steel, cold drawn Product Information -:- For detailed product information, please contact sales. -: # AISI 1021 Steel - Cold Drawn Product Technical Datasheet ## 1. Overview AISI 1021 steel is a standard low-carbon steel known for its excellent combination of strength, ductility, and weldability. When supplied in the **cold drawn** condition, the material undergoes a cold working process that significantly improves its surface finish, dimensional accuracy, and mechanical properties through strain hardening. This makes it a preferred choice for precision parts requiring good machinability without subsequent heat treatment. ## 2. Chemical Composition (Weight %) | Element | AISI 1021 Specification Range (%) | Typical Cold Drawn Analysis (%) | |---------|-----------------------------------|--------------------------------| | Carbon (C) | 0.18 - 0.23 | 0.20 | | Manganese (Mn) | 0.30 - 0.60 | 0.45 | | Phosphorus (P) | ≤ 0.040 | 0.010 | | Sulfur (S) | ≤ 0.050 | 0.025 | | Silicon (Si) | - | 0.15 - 0.30 (residual) | | Iron (Fe) | Balance | Balance | *Note: The cold drawing process does not alter the chemical composition.* ## 3. Physical Properties | Property | Typical Value / Condition | |----------|---------------------------| | **Density** | 7.87 g/cm³ (0.284 lb/in³) | | **Melting Point** | 1510 - 1530°C (2750 - 2786°F) | | **Modulus of Elasticity** | 200 GPa (29 × 10⁶ psi) | | **Poisson's Ratio** | 0.29 | | **Thermal Conductivity** | 51.9 W/m·K (at 100°C) | | **Coefficient of Thermal Expansion** | 11.7 × 10⁻⁶ /K (20-100°C) | | **Electrical Resistivity** | 0.159 µΩ·m | | **Magnetic Properties** | Ferromagnetic | ## 4. Mechanical Properties (Cold Drawn Condition) The cold drawing process involves pulling the hot-rolled bar through a die at room temperature, resulting in: - Superior surface finish - Tighter dimensional tolerances - Increased strength and hardness through work hardening ### Typical "As-Drawn" Mechanical Properties: | Property | Typical Value | Condition / Notes | |----------|---------------|-------------------| | **Tensile Strength** | 440 - 550 MPa (64 - 80 ksi) | Varies with degree of cold work | | **Yield Strength (0.2% offset)** | 370 - 480 MPa (54 - 70 ksi) | Significantly higher than hot-rolled | | **Elongation (in 50 mm / 2")** | 15 - 25% | Lower than hot-rolled due to cold work | | **Reduction of Area** | 40 - 55% | | | **Hardness** | 143 - 192 HB (Brinell) | Approx. 85 - 90 HRB | | **Machinability** | 70 - 75% (compared to 1212 steel as 100%) | Good for a low-carbon steel | ## 5. Cold Drawing Process Benefits - **Improved Surface Finish:** RMS values typically 30-60 µin, reducing need for additional finishing. - **Enhanced Dimensional Accuracy:** Standard tolerances per ASTM A29. - **Increased Strength:** Yield strength increases by 30-50% over hot-rolled condition. - **Better Straightness:** Suitable for automatic feeding in machining operations. ## 6. Product Forms & Availability (Cold Drawn) - **Rounds:** Most common form, diameters from 3 mm to 150 mm (0.125" to 6") - **Hexagons & Squares:** For tooling and specialized components - **Flats & Shapes:** Available in custom profiles - **Wire:** For fastener production and formed parts - **Surface Finish:** Bright, smooth, and scale-free ## 7. Primary Applications Cold drawn AISI 1021 is ideal for parts requiring good strength, precision, and machinability without subsequent heat treatment. - **Automotive Components:** - Shafts and spindles - Pins and bushings - Bracket and linkage components - Non-critical fasteners - **Machinery & Equipment:** - Axles and rollers - Machine tool parts - Agricultural equipment components - General structural parts - **Consumer & Industrial Goods:** - Hand tool components - Furniture hardware - Bicycle parts - General fabrication and prototyping ## 8. Fabrication Characteristics | Process | Suitability | Notes | |---------|-------------|-------| | **Machining** | Excellent | Free-machining grade; produces good chips | | **Welding** | Very Good | All common methods (SMAW, GMAW, GTAW); no pre-heat required for thin sections | | **Cold Forming/Bending** | Good | Moderate formability in cold drawn state | | **Heat Treatment** | Limited | Can be annealed to improve formability; case hardening (carburizing) possible for wear surfaces | ## 9. International Standards & Cross-References | Country/Region | Standard Designation | Equivalent/Grade Name | Condition Specification | |----------------|----------------------|-----------------------|--------------------------| | **United States** | ASTM A108 | Grade 1021 | Cold drawn bars and wire | | **United States** | SAE J403 | 1021 | Chemical composition standard | | **United States** | SAE J412 | 1021 | Material specification | | **International** | ISO 683-18 | Not directly equivalent | Similar to C22E (1.1151) | | **Europe** | EN 10083-2 | 1.1151 (C22E) | Similar carbon-manganese steel | | **Germany** | DIN 17200 | 1.1151 (C22E) | Equivalent material | | **Japan** | JIS G4051 | S20C | Very similar, slight composition differences | | **United Kingdom** | BS 970 | 040A20, 080M20 | Similar grades | *Note: While chemical equivalents exist, the "cold drawn" condition is a separate processing specification that should be explicitly requested.* ## 10. Heat Treatment Considerations (If Required) Although often used in the as-drawn condition, 1021 can be heat treated: - **Annealing:** Heat to 870-900°C (1600-1650°F), slow cool to improve machinability/formability - **Carburizing:** Effective for case hardening (870-925°C); produces hard surface (55-62 HRC) with tough core - **Normalizing:** 900-925°C (1650-1700°F) to refine grain structure - **Stress Relieving:** 550-650°C (1025-1200°F) to reduce internal stresses from cold working ## 11. Quality & Certification Cold drawn 1021 is typically supplied with: - ASTM A108 compliance for cold finished carbon steel bars - Chemical and mechanical property test reports - Dimensional inspection certificates - Special quality designations available (e.g., for shafting) ## 12. Advantages of Cold Drawn 1021 1. **Cost-Effective Precision:** Provides closer tolerances and better finish than hot-rolled at lower cost than machining from larger stock. 2. **Good Strength-to-Ductility Balance:** Cold working increases strength while maintaining reasonable elongation. 3. **Excellent Machinability:** Produces uniform chips with good surface finish. 4. **Wide Availability:** Standard grade available from multiple suppliers in various sizes. 5. **Good Weldability:** Low carbon equivalent (~0.35) minimizes welding issues. ## 13. Limitations - **Directional Properties:** Cold working creates anisotropic properties (strength varies with orientation). - **Residual Stresses:** May distort if material is unequally machined; stress relieving may be required for precision parts. - **Limited Hardness:** Not suitable for applications requiring high wear resistance without case hardening. --- *Disclaimer: This datasheet provides typical information for general reference. Properties may vary between manufacturers, lot sizes, and specific processing conditions. For critical applications, consult the material supplier's certified test reports and applicable specifications.* -:- For detailed product information, please contact sales. -: AISI 1021 Steel, cold drawn Specification Dimensions Size： Diameter 20-1000 mm Length <4775 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. -: AISI 1021 Steel, cold drawn Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1021 Steel Tube, cold drawn -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1021 Steel Tube, cold drawn -:- For detailed product information, please contact sales. -:

Packing of AISI 1021 Steel Tube, cold drawn -:- 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 1246 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