3J01 Elastic Alloy Bar
3J01 Elastic Alloy Bar is a Fe-Ni-Cr precipitation strengthened high elastic alloy bar designed for precision springs, elastic sensing elements, diaphragms, instrument components, aerospace elastic parts and corrosion-resistant precision assemblies. After solution treatment, 3J01 alloy has good plasticity and processability; after aging treatment, it can obtain high strength and elastic properties.
SASA ALLOY supplies 3J01 elastic alloy round bars, rods, forged bars and precision machined bar stock in customized diameter, length, tolerance and surface finish. MTC (Mill Test Certificate), EN 10204 3.1 certificate, PMI inspection, dimensional inspection, mechanical testing and third-party inspection can be provided according to project requirements.
Product Parameters
| Item | Details |
|---|---|
| Product Name | 3J01 Elastic Alloy Bar / Ni36CrTiAl Precision Elastic Alloy Rod |
| Grade | 3J01 / 3J1 / Ni36CrTiAl / ЭИ702 / 36HXTЮ |
| Material Type | Fe-Ni-Cr precipitation strengthened high elastic precision alloy |
| Shape & Sizes | Round bar, rod, forged bar, machined bar; common diameter 6 mm – 200 mm, customized size available |
| Length | 1000 mm – 6000 mm, cut-to-length available according to customer drawing |
| Surface Finish | Black, bright, peeled, turned, polished, ground |
| Standards | GB/T 15002, GB/T 15001 or customer technical specification |
| Tolerance | Standard tolerance, h9, h11, k12 or customized tolerance according to drawing |
| Certificate | MTC, EN 10204 3.1 certificate, PMI report, dimensional inspection report, mechanical test report and third-party inspection available |
Chemical Composition
The following chemical composition is a typical reference range for 3J01 elastic alloy. Final chemical values should be confirmed according to the actual Mill Test Certificate.
| Element | Content (%) | Function in Alloy |
|---|---|---|
| Iron (Fe) | Balance | Base element for Fe-Ni-Cr precipitation strengthened elastic alloy |
| Nickel (Ni) | 34.5 – 36.5 | Supports corrosion resistance, toughness and stable alloy structure |
| Chromium (Cr) | 11.5 – 13.0 | Improves oxidation resistance and corrosion resistance |
| Titanium (Ti) | 2.70 – 3.20 | Provides precipitation strengthening and elastic performance after aging |
| Aluminum (Al) | 1.00 – 1.80 | Supports precipitation hardening and strength development |
| Carbon (C) | ≤ 0.05 | Controlled impurity for processing and elastic performance |
| Manganese (Mn) | ≤ 1.00 | Controlled residual element and processing support |
| Silicon (Si) | ≤ 0.80 | Controlled residual element |
| Phosphorus (P) | ≤ 0.020 | Controlled impurity |
| Sulfur (S) | ≤ 0.020 | Controlled impurity |
Mechanical Properties
3J01 is mainly selected for high elastic performance and dimensional stability. Mechanical properties may vary depending on bar diameter, solution treatment, cold working and aging condition.
| Property | Reference Value | Engineering Meaning |
|---|---|---|
| Material Type | Precipitation strengthened elastic alloy | Designed for elastic elements and precision spring components |
| Tensile Strength | Condition dependent | Can be increased after solution treatment and aging |
| Yield Strength | Condition dependent | Important for spring force and elastic recovery |
| Hardness | Heat treatment dependent | Can be adjusted by cold work and aging treatment |
| Elastic Performance | High after aging treatment | Suitable for precision elastic sensing and spring parts |
| Plasticity | Good after solution treatment | Supports machining, forming and component fabrication |
| Dimensional Stability | Good after proper heat treatment | Important for precision instruments and aerospace components |
Common Size Table
| Diameter | Typical Length | Surface Finish | Common Use |
|---|---|---|---|
| 6 – 12 mm | 1000 – 3000 mm | Bright, polished, ground | Small spring pins, sensor shafts, precision instrument parts |
| 14 – 30 mm | 2000 – 6000 mm | Peeled, turned, bright | Elastic rods, precision shafts, spring components |
| 32 – 60 mm | 3000 – 6000 mm | Black, peeled, rough turned | Machined elastic parts, diaphragms, aerospace components |
| 65 – 120 mm | Cut-to-length | Forged, rough turned, machined | Large precision elastic components and custom machined parts |
| Above 120 mm | Customized | Forged, rough machined | Special project components and customized precision assemblies |
Different Specifications Comparison
| Product Form | Main Feature | Recommended Application | Selection Advice |
|---|---|---|---|
| 3J01 Round Bar | Good balance of elastic performance and machinability | Precision springs, shafts, sensor parts, machined elastic elements | Recommended for standard bar machining |
| 3J01 Forged Bar | Suitable for larger sizes and heavy-duty elastic components | Aerospace elastic parts, large machined components | Recommended for large size and customized parts |
| 3J01 Bright Bar | Better surface finish and dimensional control | Precision instruments, medical device components, sensors | Recommended when tight tolerance and appearance are important |
| 3J01 Ground Bar | Smooth surface and improved size accuracy | CNC parts, precision shafts, elastic sensing components | Recommended for final machining allowance control |
| 3J01 Strip / Sheet | Suitable for spring plates and diaphragm parts | Diaphragms, springs, elastic plates and instrument elements | Recommended when thin section or sheet geometry is required |
Equivalent Standards and International Names
| Standard / Name | Designation | Remarks |
|---|---|---|
| Chinese Grade | 3J01 | High elastic precision alloy |
| Alternative Chinese Grade | 3J1 | Common simplified designation |
| Chemical Type | Fe-Ni-Cr-Ti-Al alloy | Precipitation strengthened elastic alloy |
| International Name | Ni36CrTiAl | Indicates nickel, chromium, titanium and aluminum alloy system |
| Russian Reference | ЭИ702 / 36HXTЮ | Common international equivalent or similar reference |
| Chinese Standard | GB/T 15002 / GB/T 15001 | Technical and inspection reference for precision elastic alloys |
| Related Grades | 3J09 / 3J21 / 3J53 | Selected according to elastic performance and application requirements |
Production Process Flow
| Step | Process | Quality Control Focus |
|---|---|---|
| 1 | Raw Material Selection | Check Fe, Ni, Cr, Ti, Al content, raw material source and heat number traceability |
| 2 | Melting / Refining | Control nickel, chromium, titanium, aluminum and impurity elements |
| 3 | Ingot / Billet Preparation | Ensure suitable billet quality for rolling, forging or drawing |
| 4 | Hot Rolling / Forging | Control bar size, internal structure and deformation process |
| 5 | Solution Treatment | Improve plasticity and prepare material for later aging treatment |
| 6 | Cold Working / Straightening | Adjust dimensional accuracy and processing condition |
| 7 | Aging Treatment | Develop high mechanical strength and elastic performance |
| 8 | Peeling / Turning / Grinding | Improve surface quality and dimensional tolerance |
| 9 | Inspection and Testing | PMI, chemical analysis, dimensional inspection, surface inspection and mechanical test if required |
| 10 | Packaging and Shipment | Protective wrapping, wooden case, label, heat number and shipping mark |
Product Inspection
| Inspection Item | Inspection Method | Purpose |
|---|---|---|
| Chemical Composition | Spectrometer analysis / laboratory test | Confirm 3J01 Fe-Ni-Cr-Ti-Al alloy grade and element control |
| PMI Test | Positive Material Identification | Prevent material mix-up and wrong grade shipment |
| Mechanical Test | Tensile strength, yield strength, elongation, hardness or other required test | Verify mechanical performance according to order requirement |
| Elastic Performance Test | Customer-defined spring or elastic property test | Verify elastic performance for precision spring and sensing applications |
| Dimension Inspection | Caliper, micrometer, straightness inspection | Confirm diameter, length, tolerance and straightness |
| Surface Inspection | Visual inspection and surface quality check | Check cracks, scratches, oxidation, peeling defects and surface finish |
| Ultrasonic Testing | UT inspection if required | Check internal defects for critical bars and forged sections |
| Certificate | MTC / EN 10204 3.1 / inspection report | Ensure material traceability and project documentation |
Product Packaging
| Packaging Item | Details | Benefit |
|---|---|---|
| Surface Protection | Plastic film, anti-rust paper, oil protection or protective wrapping | Protects bar surface from scratches and oxidation during transportation |
| Bundle Packing | Bars bundled with steel strips or protective belts | Prevents movement, bending and collision |
| Wooden Case / Wooden Pallet | Export-standard wooden case or pallet | Suitable for long-distance sea, air and truck shipment |
| Labeling | Grade, size, heat number, quantity, net weight and customer mark | Improves material traceability after delivery |
| Document Support | Packing list, invoice, MTC, EN 10204 3.1 certificate and inspection report if required | Supports customs clearance and project acceptance |
Applications & Machinability
Applications
| Industry | Typical Parts | Why 3J01 Bar Is Used |
|---|---|---|
| Medical Instruments | Precision spring parts, elastic sensing elements, instrument components | Stable elastic behavior and precision machining potential for small functional components |
| Aerospace | Elastic elements, springs, diaphragms, control system components | High strength and elastic performance after aging treatment support reliable service |
| Marine Hardware | Elastic pins, precision spring elements, sensor assemblies | Can be used where elastic performance and moderate corrosion resistance are required; surface protection should be considered |
| Chemical Processing | Instrument elastic parts, sensor components, control device parts | Suitable for precision elastic function parts; corrosion environment should be evaluated before material selection |
| Instrumentation & Precision Machinery | Springs, diaphragms, elastic rods, measuring elements and precision assemblies | High elastic properties and dimensional stability make it suitable for precision devices |
Machinability, Welding and Heat Treatment
| Processing Property | Performance | Recommendation |
|---|---|---|
| Machinability | Machinable after proper solution treatment; not a free-cutting alloy like 303 stainless steel | Use rigid machines, sharp carbide tools, suitable cutting speed and sufficient coolant |
| Forming Performance | Good plasticity after solution treatment | Forming should be done before final aging treatment when possible |
| Welding Performance | Welding is possible with proper procedure, but elastic performance and heat-affected zone should be considered | Confirm welding procedure, heat treatment and final elastic property requirement before fabrication |
| Heat Treatment | Solution treatment and aging treatment are important for final strength and elastic performance | Final heat treatment should follow mechanical property target and project specification |
| Cold Working | Cold working can affect mechanical and elastic properties | Final aging or stress-relief treatment may be required after forming or machining |
| Surface Protection | Surface oxidation may occur during storage and transportation | Use oil protection, dry storage and export protective packaging |
Why Choose SAKY STEEL?
| Advantage | Description |
|---|---|
| Professional Precision Alloy Supply | SAKY STEEL supplies precision alloys including 3J01, 3J09, 3J21, 3J53, 1J soft magnetic alloys, 2J permanent magnetic alloys, 4J expansion alloys and 6J resistance alloys for industrial and high-performance applications. |
| Customized Size Capability | Diameter, length, surface finish, tolerance, cutting service and machining allowance can be customized according to customer drawings or project requirements. |
| Quality Control and Traceability | Material traceability, heat number control, PMI testing, dimensional inspection, surface inspection, mechanical testing and elastic property testing can be arranged. |
| Certificate Support | We can provide MTC (Mill Test Certificate / 质保书), EN 10204 3.1 certificate, PMI report, inspection report and other quality documents according to order requirements. |
| Export Packaging Experience | Export wooden cases, wooden pallets, protective wrapping, oil protection and clear labels help ensure safe delivery for international shipments. |
| Technical Service Support | Our team can support grade selection, equivalent standard checking, heat treatment discussion, elastic property requirement confirmation and technical document preparation before shipment. |
FAQ
Q1: What is 3J01 Bar?
3J01 Bar is a Fe-Ni-Cr precipitation strengthened high elastic alloy bar. It is used for precision springs, elastic sensing elements, diaphragms, instrument components, aerospace elastic parts and other precision elastic assemblies.
Q2: What is the equivalent name of 3J01?
3J01 is also known as 3J1, Ni36CrTiAl, ЭИ702 and 36HXTЮ in some international references. Buyers should confirm chemical composition, heat treatment condition and required mechanical properties before ordering.
Q3: What is the main feature of 3J01 elastic alloy?
The main feature of 3J01 is high elastic performance after suitable heat treatment. It has good plasticity after solution treatment and can obtain high mechanical and elastic properties after aging treatment.
Q4: Can SASA ALLOY provide 3J01 Bar with MTC?
Yes. SASA ALLOY can provide MTC (Mill Test Certificate / 质保书), EN 10204 3.1 certificate, PMI report, dimensional inspection report, mechanical test report and third-party inspection documents according to customer requirements.
Q5: What sizes of 3J01 Bar are available?
Common diameters include 6 mm to 200 mm. Length, tolerance and surface finish can be customized. Cut-to-length service is available for precision machining and elastic component production.
Q6: Is 3J01 easy to machine?
3J01 is machinable, especially after proper solution treatment, but it is not a free-cutting alloy like 303 stainless steel. Rigid equipment, sharp carbide tools, suitable cutting speed and sufficient coolant are recommended.
Q7: Can 3J01 be welded?
Welding may be possible with proper procedure, but heat input and final elastic properties should be considered. For critical spring or elastic parts, customers should confirm welding and post-weld heat treatment before fabrication.
Q8: Does 3J01 require heat treatment?
Yes. Solution treatment and aging treatment are important for achieving the required strength and elastic performance. Final heat treatment should be selected according to project specifications and mechanical property targets.
Q9: What applications use 3J01 Bar?
3J01 Bar is used in precision springs, diaphragms, elastic sensing elements, aerospace elastic components, instrument parts, precision machinery and corrosion-resistant elastic assemblies.
Q10: How can I get a quotation for 3J01 Bar?
Please send your required grade, diameter, length, quantity, surface finish, tolerance, heat treatment condition, mechanical property requirement and certificate requirements to SASA ALLOY. Our team will check availability, production route, delivery time and price for your project.
