Spherical ASTM A699 Steel Powder, class 1

ASTM A699 Steel Spherical Powder, class 1 Product Information -:- For detailed product information, please contact sales. -: ASTM A699 Steel Spherical Powder, class 1 Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical ASTM A699 Steel Powder, class 1 characteristics -:- For detailed product information, please contact sales. -: Spherical ASTM A699 Steel Powder, class 1 Particle Size -:- For detailed product information, please contact sales. -: -:- -:- 0-15μm ,5-25μm, 15-45μm, 15-53μm,20-63um, 45-75μm, 45-105μm, 45-150μm ,75-150μm. (Various granularities can be customized according to customer requirements) -:- For detailed product information, please contact sales. -:

Spherical ASTM A699 Steel Powder, class 1 Applicable processes -:- For detailed product information, please contact sales. -: Laser/electron beam additive manufacturing (SLM/EBM, 3D printing) Direct laser deposition (DLD) Used in thermal spray (TSA) Powder hot isostatic pressing (HIP) Metal injection molding (MIM) Powder metallurgy (PM) Laser cladding (LC), etc. -:- For detailed product information, please contact sales. -: Spherical ASTM A699 Steel Powder, class 1 Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: ASTM A699 Steel, class 1 Product Information -:- For detailed product information, please contact sales. -: # Technical Data Sheet: ASTM A699 Steel, Class 1 **Cold Worked Carbon Steel for High-Strength Applications** --- ## 1. PRODUCT OVERVIEW **Standard Designation:** ASTM A699/A699M **Full Title:** *Standard Specification for Steel, Carbon, Cold-Worked, for Springs and Other Applications* **Classification:** Class 1 **International Standard:** ASTM International (American Society for Testing and Materials) **Material Type:** Cold-worked (strain-hardened) carbon steel **Primary Processing:** Cold drawing or cold rolling to achieve specified mechanical properties without subsequent heat treatment **Key Distinction:** High-strength carbon steel produced exclusively through cold working, not heat treatment --- ## 2. MATERIAL CHARACTERISTICS & MANUFACTURING ### 2.1 Manufacturing Process ASTM A699 Class 1 steel is produced through a **severe cold working process** that induces significant strain hardening: **Production Sequence:** 1. **Starting Material:** Hot-rolled carbon steel wire or rod 2. **Cold Reduction:** 30-50% cross-sectional area reduction through cold drawing or rolling 3. **Surface Treatment:** Scale removal via pickling or mechanical descaling 4. **Final Processing:** Straightening, cutting, and surface finishing as required 5. **No Heat Treatment:** Properties achieved solely through cold work; no annealing or tempering ### 2.2 Metallurgical Principles **Strain Hardening Mechanism:** - Dislocation multiplication and entanglement during cold working - Grain elongation in the direction of working - Increased dislocation density (10¹⁰-10¹² cm⁻²) - Resulting in significantly increased strength with corresponding reduction in ductility **Microstructural Characteristics:** - **Grain Structure:** Highly elongated grains parallel to working direction - **Texture:** Strong preferred orientation (fiber texture) - **Residual Stresses:** Significant surface compressive stresses - **Anisotropy:** Pronounced directional properties --- ## 3. CHEMICAL COMPOSITION ### 3.1 Base Composition Requirements | Element | Composition Range (% by weight, maximum unless specified) | Metallurgical Function | |---------|-----------------------------------------------------------|------------------------| | **Carbon (C)** | 0.65 - 0.85 | Primary strengthening element; controls achievable hardness | | **Manganese (Mn)** | 0.60 - 0.90 | Enhances hardenability, solid solution strengthening | | **Phosphorus (P)** | 0.040 max | Impurity control for ductility | | **Sulfur (S)** | 0.050 max | Impurity control; may be slightly elevated for machinability | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer, solid solution strengthener | | **Copper (Cu)** | 0.20 max (when copper steel is specified) | Optional for corrosion resistance | ### 3.2 Grade Variations within Class 1 **Three Quality Designations:** 1. **Commercial Quality:** Standard applications, typical composition as above 2. **Special Quality:** Tighter composition control, enhanced properties 3. **Drawing Quality:** Optimized for severe cold forming operations ### 3.3 Residual Element Control - **Chromium (Cr):** ≤0.20% (unless specified otherwise) - **Nickel (Ni):** ≤0.20% (unless specified otherwise) - **Molybdenum (Mo):** ≤0.10% (trace amounts) - **Total Alloys (Cr+Ni+Mo):** Typically ≤0.50% unless otherwise specified **Note:** Exact composition may vary slightly among producers while meeting mechanical property requirements. --- ## 4. MECHANICAL PROPERTIES ### 4.1 Minimum Required Properties (ASTM A699) | Property | Minimum Requirement | Test Method | Notes | |----------|---------------------|-------------|-------| | **Tensile Strength** | 1300 MPa (188 ksi) minimum | ASTM A370 | Property increases with cold work severity | | **Yield Strength (0.2% offset)** | Not specified; typically 80-90% of tensile | ASTM A370 | - | | **Elongation in 10×Diameter** | 5% minimum | ASTM A370 | Reduces with increased cold work | | **Reduction of Area** | 30% minimum | ASTM A370 | Important for spring applications | | **Hardness** | 38-45 HRC typical | ASTM E18 | Varies with carbon content and cold work | ### 4.2 Typical Property Ranges (Class 1) | Property | Typical Range | Directional Variation | |----------|---------------|------------------------| | **Tensile Strength** | 1300-1600 MPa (188-232 ksi) | 5-10% higher longitudinal | | **Yield Strength** | 1100-1400 MPa (160-203 ksi) | More pronounced anisotropy | | **Elongation (Longitudinal)** | 5-8% | Significantly lower transverse | | **Reduction of Area** | 30-40% | Important spring design parameter | | **Shear Strength** | 780-960 MPa (113-139 ksi) | Approximately 0.6×tensile | | **Fatigue Strength (10⁷ cycles)** | 450-550 MPa (65-80 ksi) | Rotating bending, polished specimen | | **Torsional Strength** | 650-800 MPa (94-116 ksi) | For spring applications | ### 4.3 Hardness Characteristics - **Rockwell C:** 38-45 HRC (typical as-produced) - **Brinell Hardness:** 360-430 HB (converted) - **Surface Hardness:** May be 2-5 HRC higher than core - **Anisotropy:** Minimal hardness variation with direction --- ## 5. PHYSICAL PROPERTIES | Property | Value | Conditions/Notes | |----------|-------|------------------| | **Density** | 7.85 g/cm³ (0.284 lb/in³) | Unaffected by cold working | | **Modulus of Elasticity (E)** | 200-205 GPa (29,000-29,700 ksi) | Slightly increased longitudinally | | **Shear Modulus (G)** | 78-80 GPa (11,300-11,600 ksi) | Critical for spring design | | **Poisson's Ratio** | 0.285-0.295 | Slight anisotropy possible | | **Coefficient of Thermal Expansion** | 11.5 × 10⁻⁶/°C (6.4 × 10⁻⁶/°F) | 20-100°C range | | **Thermal Conductivity** | 48 W/(m·K) | At 100°C; reduces with carbon content | | **Specific Heat** | 0.46 kJ/(kg·K) | At 20°C | | **Electrical Resistivity** | 0.18 μΩ·m | At 20°C; increases with cold work | | **Magnetic Properties** | Ferromagnetic | Fully magnetic at all conditions | --- ## 6. FABRICATION CHARACTERISTICS ### 6.1 Forming Limitations **Due to High Strength and Limited Ductility:** - **Cold Forming:** Severely limited; only minor straightening possible - **Bending:** Minimum bend radius typically 8-10×thickness - **Hot Working:** Not recommended as it destroys cold-worked properties - **Machining:** Required for most shaping operations ### 6.2 Machinability **Rating:** Fair to Poor (40-50% relative to B1112 free-machining steel) **Recommended Practices:** - **Tool Material:** Carbide or ceramic tools required - **Cutting Speed:** 30-60 m/min (100-200 SFM) for turning - **Feed Rate:** Moderate to heavy feeds to overcome hardness - **Coolant:** Essential for heat dissipation and tool life - **Tool Geometry:** Positive rake angles, sharp cutting edges ### 6.3 Heat Treatment Response **Important:** ASTM A699 Class 1 is supplied in cold-worked condition only **If Heat Treated:** - **Annealing:** Will completely destroy cold-worked properties - **Stress Relief:** 200-300°C (400-570°F) for 1-2 hours may reduce residual stresses - **Tempering:** Not applicable (no prior hardening) - **Caution:** Temperatures above 400°C (750°F) will cause significant property loss ### 6.4 Surface Treatments **Compatible Processes:** - **Shot Peening:** Enhances fatigue resistance (commonly used) - **Plating:** Chromium, zinc, cadmium (with proper preparation) - **Phosphating:** Improves corrosion resistance and paint adhesion - **Coating:** Various organic coatings possible --- ## 7. PRIMARY APPLICATIONS ### 7.1 Spring Applications (Primary Use) | Application Type | Specific Components | Why Class 1 is Suitable | |------------------|---------------------|--------------------------| | **Heavy-Duty Springs** | Truck suspension springs, railway springs | High strength, good fatigue resistance | | **Industrial Springs** | Valve springs, clutch springs, die springs | Consistent properties, reliability | | **Agricultural Springs** | Implement springs, plow springs | Corrosion resistance with coating | | **Mechanical Springs** | Torsion bars, flat springs, spiral springs | High elastic limit | ### 7.2 Wear-Resistant Components - **Bushings and Bearings:** Where high hardness required - **Wear Plates:** For abrasive applications - **Cutting Edges:** Non-tool applications requiring hardness - **Agricultural Wear Parts:** Tillage points, cultivator shovels ### 7.3 Fasteners and Connectors - **High-Strength Pins:** Shear pins, hinge pins - **Special Bolts:** Where conventional grades insufficient - **Connecting Rods:** For specific machinery applications - **Axles and Shafts:** Small diameter, high-strength requirements ### 7.4 Tooling and Fixtures - **Jigs and Fixtures:** Where dimensional stability critical - **Gauges:** Precision measurement components - **Machine Components:** Slides, ways, wear surfaces - **Forming Dies:** For specific non-ferrous forming ### 7.5 Specialized Applications - **Musical Instruments:** High-strength wire components - **Sports Equipment:** Archery components, high-stress parts - **Medical Devices:** Surgical instrument components - **Aerospace:** Non-critical structural components --- ## 8. COMPARATIVE ANALYSIS ### 8.1 Within ASTM A699 Family | Property | Class 1 | Class 2 | Class 3 | |----------|---------|---------|---------| | **Carbon Range** | 0.65-0.85% | 0.70-0.90% | 0.85-1.05% | | **Min Tensile Strength** | 1300 MPa | 1400 MPa | 1500 MPa | | **Typical Hardness** | 38-45 HRC | 40-47 HRC | 42-50 HRC | | **Primary Application** | General springs | Higher stress springs | Maximum strength springs | | **Relative Cost** | 1.00 | 1.05-1.10 | 1.10-1.20 | ### 8.2 Comparison with Heat-Treated Spring Steels | Property | A699 Class 1 (Cold-worked) | SAE 1074/1080 (Oil-quenched) | ASTM A401 (Cr-Si) | |----------|----------------------------|-------------------------------|-------------------| | **Strength Level** | High | Similar/Variable | Higher | | **Production Method** | Cold working only | Heat treatment required | Heat treatment required | | **Property Uniformity** | Excellent | Batch dependent | Batch dependent | | **Anisotropy** | Significant | Minimal | Minimal | | **Cost Factor** | Moderate | Low to Moderate | High | | **Fatigue Resistance** | Good | Good to Excellent | Excellent | --- ## 9. DESIGN CONSIDERATIONS ### 9.1 Spring Design Specifics **Spring Rate Calculation:** - Use shear modulus (G) for torsion springs - Account for 5-10% relaxation in service - Design for maximum shear stress ≤ 0.45×tensile strength **Fatigue Design:** - Endurance limit typically 0.35-0.40×tensile strength - Surface finish critical: polished surfaces improve fatigue life 2-3× - Shot peening recommended for fatigue applications ### 9.2 Stress Analysis Considerations **Directional Properties:** - Use longitudinal properties for primary load direction - Transverse properties may be 20-30% lower - Shear strength approximately 60% of tensile strength **Residual Stress Effects:** - Surface compressive stresses improve fatigue resistance - May cause dimensional changes if machined asymmetrically - Consider in tolerance analysis for precision components ### 9.3 Temperature Limitations - **Maximum Service Temperature:** 150°C (300°F) short term - **Continuous Service:** 120°C (250°F) maximum - **Low Temperature:** Good to -40°C (-40°F) - **Property Loss:** Begins above 200°C (390°F), significant above 300°C (570°F) --- ## 10. QUALITY ASSURANCE & TESTING ### 10.1 Standard Testing Requirements | Test | Frequency | Specimen Requirements | Acceptance Criteria | |------|-----------|------------------------|---------------------| | **Chemical Analysis** | Each heat | Drillings or mill samples | Meets composition limits | | **Tension Test** | Each lot | Full cross-section or machined | Meets strength and elongation | | **Hardness Test** | Each lot | Multiple locations | Consistent within range | | **Surface Inspection** | 100% visual | As produced | Free from cracks, seams | | **Dimensional Check** | Statistical sampling | All dimensions | Within specified tolerances | ### 10.2 Supplementary Testing (When Specified) - **Decarburization Check:** Maximum depth typically 1% of diameter or 0.25mm - **Grain Flow Examination:** Macro-etch to verify proper cold working - **Non-destructive Testing:** Magnetic particle or dye penetrant - **Fatigue Testing:** For critical spring applications ### 10.3 Certification Requirements - **Mill Test Certificate:** Chemical and mechanical properties - **Traceability:** Heat/lot number traceable to production records - **Compliance Statement:** Confirmation to ASTM A699 Class 1 requirements --- ## 11. ORDERING INFORMATION ### 11.1 Specification Format ``` Material: ASTM A699, Class 1 Form: [Wire, Rod, Bar, Strip] - specify Dimensions: [Diameter, Width, Thickness] and tolerances Condition: Cold worked, as drawn/rolled Surface Finish: [Bright, Pickled, Oiled] - specify End Use: [Springs, Machined Parts, etc.] - for information Special Requirements: [Straightness, Packaging, Testing] Quantity: [Weight or Piece Count] ``` ### 11.2 Available Forms & Sizes | Form | Typical Size Range | Common Tolerances | |------|-------------------|-------------------| | **Round Wire** | 1.0-12.0 mm diameter | ±0.05mm (precision), ±0.10mm (commercial) | | **Flat Wire** | 0.5-6.0 mm thickness, 2-50 mm width | Thickness ±0.03mm, Width ±0.10mm | | **Rods/Bars** | 6-50 mm diameter | Diameter ±0.10mm, Straightness 1mm/m | | **Coils** | All wire forms available in coil | Coil weight typically 100-500kg | ### 11.3 Surface Finish Options 1. **Bright Finish:** As-drawn, smooth surface 2. **Pickled & Oiled:** Scale removed, corrosion protected 3. **Phosphated:** For improved corrosion resistance/paint adhesion 4. **Special Coatings:** Available upon request --- ## 12. INTERNATIONAL EQUIVALENTS | Region/Standard | Equivalent Grade | Comparison Notes | |-----------------|------------------|------------------| | **European (EN)** | EN 10270-1 SH (Spring Steel) | Similar cold-worked spring steel | | **Japanese (JIS)** | JIS G 4801 (Spring Steel) | Similar classification available | | **Chinese (GB)** | GB/T 1222 (Spring Steel) | Heat treated equivalents more common | | **ISO** | ISO 8458-2 | Cold drawn non-alloy steel for springs | | **SAE** | SAE 1065-1085 ranges | Similar composition, different processing | --- ## 13. FABRICATION BEST PRACTICES ### 13.1 Handling & Storage - **Handling:** Avoid bending or kinking during handling - **Storage:** Dry conditions to prevent corrosion - **Identification:** Maintain heat/lot segregation - **Shelf Life:** Indefinite if properly stored ### 13.2 Machining Guidelines 1. **Tool Selection:** Carbide or ceramic for production, HSS for prototypes 2. **Cutting Parameters:** Conservative speeds, moderate feeds 3. **Coolant:** Flood coolant recommended 4. **Deburring:** Essential to prevent stress concentrations 5. **Inspection:** Check for machining-induced stresses ### 13.3 Spring Manufacturing - **Coiling:** Cold coiling possible but limited by spring index - **Setting:** Stress relief at 200-250°C improves dimensional stability - **Finishing:** Shot peening for fatigue applications - **Testing:** 100% proof testing recommended for critical springs --- ## 14. TECHNICAL SUPPORT RESOURCES ### 14.1 Design Assistance - **Spring Design:** Manufacturers provide design support - **Application Engineering:** Available from material suppliers - **Failure Analysis:** For field performance issues - **Testing Services:** Available through third-party labs ### 14.2 Industry Standards & References - **SAE Handbook:** Spring design guidelines - **Spring Manufacturers Institute:** Technical resources - **ASTM Standards:** Related material specifications - **Machinery's Handbook:** Machining and design data --- ## SUMMARY **ASTM A699 Class 1** represents a specialized **cold-worked high-carbon steel** achieving exceptional strength through severe cold deformation rather than heat treatment. This production method provides consistent properties, excellent surface characteristics, and good fatigue resistance for demanding spring and high-strength applications. **Key Advantages:** 1. **Consistent Properties:** Cold working produces uniform mechanical properties 2. **High Strength:** 1300 MPa minimum tensile strength without heat treatment 3. **Good Fatigue Resistance:** Particularly with proper surface treatment 4. **Cost-Effective:** Eliminates heat treatment costs for suitable applications 5. **Surface Quality:** Excellent as-produced surface for many applications **Limitations & Considerations:** 1. **Limited Formability:** Cannot be significantly formed after cold working 2. **Anisotropy:** Properties vary with direction 3. **Temperature Sensitivity:** Properties degrade above 200°C 4. **Machining Difficulty:** Requires appropriate tooling and techniques **Optimal Application Scenarios:** - Coiled or formed springs where cold working can be final operation - Components requiring high strength and hardness with good surface finish - Applications where heat treatment distortion must be avoided - Production environments seeking consistent, reliable material properties **Selection Criteria:** 1. Determine if cold-worked properties meet application requirements 2. Consider directional property requirements 3. Evaluate total manufacturing cost including any required machining 4. Assess temperature exposure during service 5. Verify availability in required form and size **Final Recommendation:** ASTM A699 Class 1 is recommended for engineers and manufacturers with experience in high-strength carbon steels. It provides excellent performance for spring applications and other components requiring high strength without subsequent heat treatment, but requires understanding of its unique characteristics and limitations. --- **IMPORTANT NOTES:** 1. This material cannot be heat treated to alter properties; it must be used as-supplied 2. Design must account for significant property anisotropy 3. Temperature exposure during any processing must be controlled 4. Proper machining techniques are essential for successful fabrication 5. Consultation with material suppliers is recommended for critical applications **DISCLAIMER:** This technical information is provided for general guidance. For specific applications, consult the latest edition of ASTM A699/A699M, relevant design codes, and qualified engineering professionals. Material properties may vary by manufacturer and production batch. Always review certified mill test reports for critical applications. -:- For detailed product information, please contact sales. -: ASTM A699 Steel, class 1 Specification Dimensions Size： Diameter 20-1000 mm Length <5953 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 A699 Steel, class 1 Properties -:- For detailed product information, please contact sales. -:

Spherical ASTM A699 Steel Powder, class 1 Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical ASTM A699 Steel Powder, class 1 -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of ASTM A699 Steel Spherical Powder, class 1 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A699 Steel Spherical Powder, class 1 -:- For detailed product information, please contact sales. -:

Packing of ASTM A699 Steel Spherical Powder, class 1 -:- 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 Spherical Powder 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 2424 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