Cold Rolled 316L Stainless Steel Strip With 2B BA Bright Polishing Stainless Steel Coils

JIS G4305 SUS304 Stainless Steel Strips Thickness 0.1 - 3.0mm – Precision Slit Cutting Edge for Spring Applications Product Overview SUS304 stainless steel strips, manufactured in strict compliance with the JIS G4305:2021 standard, represent one of the most widely used austenitic stainless steel grades in precision engineering and industrial applications. With a thickness range of 0.1 mm to 3.0 mm, these cold-rolled strips are specially processed with precision slit cutting edges, making them ideal for high-performance components such as springs, connectors, terminals, and electronic parts. SUS304 (also known internationally as AISI 304 or UNS S30400) offers an excellent balance of corrosion resistance, formability, weldability, and mechanical strength. Its composition—typically 18% chromium and 8% nickel—ensures superior performance in both ambient and mildly aggressive environments, including food processing, medical devices, automotive systems, and consumer electronics. This product page provides comprehensive technical specifications, chemical composition, mechanical properties, and application guidance for engineers, procurement specialists, and manufacturers seeking reliable, high-tolerance stainless steel strip material. Key Features & Advantages ✅ Compliance: Fully conforms to JIS G4305:2021 (Cold-Rolled Stainless Steel Plate, Sheet, and Strip) ✅ Precision Slitting: Edge tolerance ±0.01 mm; burr-free finish for automated assembly ✅ Thickness Range: 0.1 mm – 3.0 mm (customizable upon request) ✅ Width Options: 5 mm – 600 mm (standard); narrower widths available for micro-spring applications ✅ Surface Finish: 2B, BA (Bright Annealed), or custom finishes (e.g., hairline, matte) ✅ Excellent Spring Properties: High fatigue resistance and elastic recovery after repeated deflection ✅ Corrosion Resistance: Resists oxidation up to 800°C; suitable for humid, saline, and mildly acidic environments ✅ Non-Magnetic (Annealed State): Ideal for sensitive electronic and medical instruments Technical Specifications Parameter Specification Standard JIS G4305:2021 Material Grade SUS304 (Japanese Industrial Standard) Equivalent Grades AISI 304 (USA), X5CrNi18-10 (EN), 1.4301 (DIN), 06Cr19Ni10 (GB/T) Form Cold-rolled stainless steel strip Thickness Range 0.1 mm – 3.0 mm Width Range 5 mm – 600 mm (precision slit to ±0.05 mm tolerance) Tolerance (Thickness) ±0.005 mm (for <0.5 mm); ±1% (for ≥0.5 mm) Edge Condition Precision slit, deburred, no edge cracks Surface Finish 2B (standard), BA (Bright Annealed), HL (Hairline), or customer-specified Temper Condition Annealed (soft), 1/4H, 1/2H, H, EH, SH (spring temper available) Density 7.93 g/cm³ Magnetic Property Non-magnetic in annealed condition; may become slightly magnetic after cold work Chemical Composition (JIS G4303 / JIS G4311) The chemical composition of SUS304 is tightly controlled to ensure consistent performance: Element Content (%) – Max/Min Carbon (C) ≤ 0.08 Silicon (Si) ≤ 1.00 Manganese (Mn) ≤ 2.00 Phosphorus (P) ≤ 0.045 Sulfur (S) ≤ 0.030 Chromium (Cr) 18.0 – 20.0 Nickel (Ni) 8.0 – 10.5 Iron (Fe) Balance Note: All values comply with JIS G4303-1998 and JIS G4311-1991 standards. Mechanical Properties (Typical Values – Annealed Condition) Property Value Tensile Strength 515 – 720 MPa Yield Strength (0.2% offset) ≥ 205 MPa Elongation (in 50 mm) ≥ 40% Hardness (HV) 150 – 200 Modulus of Elasticity ~193 GPa Thermal Conductivity 16.2 W/m·K (at 100°C) Coefficient of Thermal Expansion 17.2 µm/m·°C (20–100°C) For spring applications, strips are often supplied in 1/2 Hard (H) or Full Hard (EH/SH) tempers, offering higher yield strength (up to 1000 MPa) and improved resilience. Why Choose Precision-Slit SUS304 Strips for Springs? Springs require materials that can endure repeated stress cycles without permanent deformation. SUS304 stainless steel strips offer: High Elastic Limit: Maintains shape integrity under dynamic loading. Fatigue Resistance: Performs reliably in high-cycle applications (e.g., battery contacts, relay springs). Clean Edges: Precision slitting eliminates micro-cracks and burrs that could initiate fatigue failure. Corrosion Protection: Unlike carbon steel springs, SUS304 does not require plating or coating in most environments. Biocompatibility: Meets ISO 10993 standards for medical implant components (when properly finished). Common spring types made from SUS304 strips include: Contact springs (electronics) Clip springs (automotive interiors) Torsion springs (small appliances) Flat spiral springs (watches, sensors) Manufacturing & Quality Control Our SUS304 strips are produced using advanced continuous cold rolling and annealing lines, followed by laser-guided precision slitting. Each coil undergoes rigorous quality checks: Dimensional Accuracy: Verified via laser micrometers and optical edge scanners. Surface Inspection: Automated vision systems detect scratches, pits, or roll marks. Material Certification: Mill Test Reports (MTRs) provided per EN 10204 3.1 or 3.2. Batch Traceability: Full heat number tracking from melt to final coil. Optional value-added services: Custom Packaging: Plastic-wrapped coils on wooden pallets for export. Edge Conditioning: Rounded or chamfered edges for high-speed stamping. Lubricant-Free Surface: For cleanroom or medical-grade applications. Applications Industry Use Cases Electronics Battery contacts, SIM card trays, switch springs, EMI shielding strips Automotive Seat belt retractors, sensor springs, fuel injector components Medical Surgical instrument parts, implantable device springs, diagnostic equipment Industrial Valve springs, pressure sensors, filtration mesh Consumer Goods Eyeglass frames, watch bands, kitchen appliance hinges Ordering Information To place an order or request a sample, please provide the following details: Grade: SUS304 (JIS G4305) Thickness: e.g., 0.25 mm ±0.005 mm Width: e.g., 12.5 mm ±0.05 mm Temper: Annealed / 1/2H / Spring Temper (specify if for spring use) Surface Finish: 2B / BA / Custom Coil ID: 200 mm, 300 mm, or 508 mm (20”) Weight per Coil: Typically 10–50 kg (adjustable) Packaging: VCI paper + plastic wrap + export crate Minimum Order Quantity (MOQ): 100 kg Lead Time: 7–15 days (depending on specification) FAQs Q: Is SUS304 the same as 304 stainless steel? A: Yes. SUS304 is the Japanese designation (JIS standard), while 304 is the AISI/ASTM designation. Chemical and mechanical properties are nearly identical. Q: Can SUS304 strips be used in marine environments? A: SUS304 offers good resistance to atmospheric corrosion but may pit in prolonged seawater exposure. For harsh marine use, consider SUS316L. Q: What’s the difference between 2B and BA finish? A: 2B is a standard mill finish with moderate reflectivity. BA (Bright Annealed) is highly reflective, smooth, and ideal for decorative or optical applications. Q: Do you provide RoHS/REACH compliance documentation? A: Yes. All our SUS304 strips are compliant with RoHS, REACH, and conflict minerals regulations. Conclusion JIS G4305 SUS304 stainless steel strips (0.1–3.0 mm) with precision slit edges deliver unmatched reliability for spring and precision component manufacturing. Backed by stringent quality control, international standards compliance, and customizable processing, they are the material of choice for engineers demanding durability, consistency, and performance. Whether you're designing micro-electronic contacts or automotive safety mechanisms, our SUS304 strips ensure your products meet the highest functional and aesthetic standards.JIS G4305 SUS304 Stainless Steel Strips Thickness 0.1 - 3.0mm – Precision Slit Cutting Edge for Spring Applications Product Overview SUS304 stainless steel strips, manufactured in strict compliance with the JIS G4305:2021 standard, represent one of the most widely used austenitic stainless steel grades in precision engineering and industrial applications. With a thickness range of 0.1 mm to 3.0 mm, these cold-rolled strips are specially processed with precision slit cutting edges, making them ideal for high-performance components such as springs, connectors, terminals, and electronic parts. SUS304 (also known internationally as AISI 304 or UNS S30400) offers an excellent balance of corrosion resistance, formability, weldability, and mechanical strength. Its composition—typically 18% chromium and 8% nickel—ensures superior performance in both ambient and mildly aggressive environments, including food processing, medical devices, automotive systems, and consumer electronics. This product page provides comprehensive technical specifications, chemical composition, mechanical properties, and application guidance for engineers, procurement specialists, and manufacturers seeking reliable, high-tolerance stainless steel strip material. Key Features & Advantages ✅ Compliance: Fully conforms to JIS G4305:2021 (Cold-Rolled Stainless Steel Plate, Sheet, and Strip) ✅ Precision Slitting: Edge tolerance ±0.01 mm; burr-free finish for automated assembly ✅ Thickness Range: 0.1 mm – 3.0 mm (customizable upon request) ✅ Width Options: 5 mm – 600 mm (standard); narrower widths available for micro-spring applications ✅ Surface Finish: 2B, BA (Bright Annealed), or custom finishes (e.g., hairline, matte) ✅ Excellent Spring Properties: High fatigue resistance and elastic recovery after repeated deflection ✅ Corrosion Resistance: Resists oxidation up to 800°C; suitable for humid, saline, and mildly acidic environments ✅ Non-Magnetic (Annealed State): Ideal for sensitive electronic and medical instruments Technical Specifications Parameter Specification Standard JIS G4305:2021 Material Grade SUS304 (Japanese Industrial Standard) Equivalent Grades AISI 304 (USA), X5CrNi18-10 (EN), 1.4301 (DIN), 06Cr19Ni10 (GB/T) Form Cold-rolled stainless steel strip Thickness Range 0.1 mm – 3.0 mm Width Range 5 mm – 600 mm (precision slit to ±0.05 mm tolerance) Tolerance (Thickness) ±0.005 mm (for <0.5 mm); ±1% (for ≥0.5 mm) Edge Condition Precision slit, deburred, no edge cracks Surface Finish 2B (standard), BA (Bright Annealed), HL (Hairline), or customer-specified Temper Condition Annealed (soft), 1/4H, 1/2H, H, EH, SH (spring temper available) Density 7.93 g/cm³ Magnetic Property Non-magnetic in annealed condition; may become slightly magnetic after cold work Chemical Composition (JIS G4303 / JIS G4311) The chemical composition of SUS304 is tightly controlled to ensure consistent performance: Element Content (%) – Max/Min Carbon (C) ≤ 0.08 Silicon (Si) ≤ 1.00 Manganese (Mn) ≤ 2.00 Phosphorus (P) ≤ 0.045 Sulfur (S) ≤ 0.030 Chromium (Cr) 18.0 – 20.0 Nickel (Ni) 8.0 – 10.5 Iron (Fe) Balance Note: All values comply with JIS G4303-1998 and JIS G4311-1991 standards. Mechanical Properties (Typical Values – Annealed Condition) Property Value Tensile Strength 515 – 720 MPa Yield Strength (0.2% offset) ≥ 205 MPa Elongation (in 50 mm) ≥ 40% Hardness (HV) 150 – 200 Modulus of Elasticity ~193 GPa Thermal Conductivity 16.2 W/m·K (at 100°C) Coefficient of Thermal Expansion 17.2 µm/m·°C (20–100°C) For spring applications, strips are often supplied in 1/2 Hard (H) or Full Hard (EH/SH) tempers, offering higher yield strength (up to 1000 MPa) and improved resilience. Why Choose Precision-Slit SUS304 Strips for Springs? Springs require materials that can endure repeated stress cycles without permanent deformation. SUS304 stainless steel strips offer: High Elastic Limit: Maintains shape integrity under dynamic loading. Fatigue Resistance: Performs reliably in high-cycle applications (e.g., battery contacts, relay springs). Clean Edges: Precision slitting eliminates micro-cracks and burrs that could initiate fatigue failure. Corrosion Protection: Unlike carbon steel springs, SUS304 does not require plating or coating in most environments. Biocompatibility: Meets ISO 10993 standards for medical implant components (when properly finished). Common spring types made from SUS304 strips include: Contact springs (electronics) Clip springs (automotive interiors) Torsion springs (small appliances) Flat spiral springs (watches, sensors) Manufacturing & Quality Control Our SUS304 strips are produced using advanced continuous cold rolling and annealing lines, followed by laser-guided precision slitting. Each coil undergoes rigorous quality checks: Dimensional Accuracy: Verified via laser micrometers and optical edge scanners. Surface Inspection: Automated vision systems detect scratches, pits, or roll marks. Material Certification: Mill Test Reports (MTRs) provided per EN 10204 3.1 or 3.2. Batch Traceability: Full heat number tracking from melt to final coil. Optional value-added services: Custom Packaging: Plastic-wrapped coils on wooden pallets for export. Edge Conditioning: Rounded or chamfered edges for high-speed stamping. Lubricant-Free Surface: For cleanroom or medical-grade applications. Applications Industry Use Cases Electronics Battery contacts, SIM card trays, switch springs, EMI shielding strips Automotive Seat belt retractors, sensor springs, fuel injector components Medical Surgical instrument parts, implantable device springs, diagnostic equipment Industrial Valve springs, pressure sensors, filtration mesh Consumer Goods Eyeglass frames, watch bands, kitchen appliance hinges Ordering Information To place an order or request a sample, please provide the following details: Grade: SUS304 (JIS G4305) Thickness: e.g., 0.25 mm ±0.005 mm Width: e.g., 12.5 mm ±0.05 mm Temper: Annealed / 1/2H / Spring Temper (specify if for spring use) Surface Finish: 2B / BA / Custom Coil ID: 200 mm, 300 mm, or 508 mm (20”) Weight per Coil: Typically 10–50 kg (adjustable) Packaging: VCI paper + plastic wrap + export crate Minimum Order Quantity (MOQ): 100 kg Lead Time: 7–15 days (depending on specification) FAQs Q: Is SUS304 the same as 304 stainless steel? A: Yes. SUS304 is the Japanese designation (JIS standard), while 304 is the AISI/ASTM designation. Chemical and mechanical properties are nearly identical. Q: Can SUS304 strips be used in marine environments? A: SUS304 offers good resistance to atmospheric corrosion but may pit in prolonged seawater exposure. For harsh marine use, consider SUS316L. Q: What’s the difference between 2B and BA finish? A: 2B is a standard mill finish with moderate reflectivity. BA (Bright Annealed) is highly reflective, smooth, and ideal for decorative or optical applications. Q: Do you provide RoHS/REACH compliance documentation? A: Yes. All our SUS304 strips are compliant with RoHS, REACH, and conflict minerals regulations. Conclusion JIS G4305 SUS304 stainless steel strips (0.1–3.0 mm) with precision slit edges deliver unmatched reliability for spring and precision component manufacturing. Backed by stringent quality control, international standards compliance, and customizable processing, they are the material of choice for engineers demanding durability, consistency, and performance. Whether you're designing micro-electronic contacts or automotive safety mechanisms, our SUS304 strips ensure your products meet the highest functional and aesthetic standards.

Cold Rolled 316L Stainless Steel Strip with 2B, BA, and Bright Polished Finishes – Technical Guide for Industrial Applications

Introduction

In high-performance industries such as medical device manufacturing, food processing, pharmaceuticals, and precision engineering, material selection is critical. Among the most trusted materials is cold rolled 316L stainless steel strip, prized for its exceptional corrosion resistance, mechanical stability, and surface versatility. Available in key finishes—2B, BA (Bright Annealed), and Bright Polished—these stainless steel coils meet stringent global standards while offering tailored surface properties for diverse functional and aesthetic needs.

This comprehensive guide explores the composition, manufacturing process, surface finish characteristics, dimensional tolerances, applications, and compliance standards of cold rolled 316L stainless steel strips. Supported by detailed comparison tables and optimized for clarity and search relevance, this article serves engineers, procurement specialists, and technical buyers seeking reliable, high-quality stainless steel solutions.

What Is Cold Rolled 316L Stainless Steel Strip?

316L stainless steel is a low-carbon (≤0.03% C), molybdenum-enhanced (2–3% Mo) austenitic alloy. The “L” minimizes carbide precipitation during welding, ensuring superior intergranular corrosion resistance—especially vital in chloride-rich or high-temperature environments.

Cold rolling is a room-temperature deformation process that:

• Reduces thickness with high precision
• Improves surface smoothness
• Increases tensile strength through work hardening
• Enables tight dimensional tolerances (±0.005 mm achievable)

The resulting strip is ideal for applications requiring flatness, consistency, and cleanability, such as surgical instruments, sensor diaphragms, or food-grade conveyor components.

Key Surface Finishes: 2B, BA, and Bright Polished

Surface finish directly impacts performance in hygienic, optical, or decorative applications. Below is a detailed comparison:

Surface Finish Comparison Table

Note: BA finish is achieved during annealing, while bright polishing is a secondary mechanical process. BA offers better corrosion resistance than mechanically polished surfaces due to absence of embedded abrasives.

Material Standards & Global Equivalents

316L is standardized worldwide under different naming conventions, but all share near-identical chemistry and performance.

Chemical Composition (Typical, wt.%)

All variants comply with major international standards:

• ASTM (USA): A240, A480
• JIS (Japan): G4303, G4304
• EN (Europe): 10088-2, 10258
• GB (China): T20878, T3280

Suppliers typically provide Mill Test Reports (MTRs) per EN 10204 3.1/3.2, ensuring full traceability.

Dimensional Specifications & Tolerances

Cold rolled 316L strips are available in ultra-thin gauges with micron-level accuracy.

Standard Product Range

Thickness Tolerance (Per EN 10258 / ASTM A480)

Precision grades are produced using closed-loop gauge control systems and are essential for automated stamping or laser cutting lines.

Mechanical Properties (Annealed Condition)

These properties support deep drawing, bending, and micro-forming without cracking—critical for medical and electronic components.

Manufacturing Process Overview

1. Melting & Casting: AOD (Argon Oxygen Decarburization) ensures low carbon and minimal inclusions.
2. Hot Rolling: Slabs rolled into thick coils (~3–6 mm).
3. Cold Rolling: Multi-pass reduction to final thickness with intermediate annealing.
4. Annealing:
   • 2B: Annealed in air, then pickled in acid.
   • BA: Annealed in pure H₂/N₂ atmosphere—no scale forms, yielding reflective surface.
5. Surface Treatment:
   • 2B: Light skin-pass rolling for uniform matte finish.
   • BA: No further treatment needed.
   • Bright Polished: Buffed with fine abrasives (e.g., 600–1200 grit).
6. Slitting & Inspection: Precision slitting onto 508mm cores; 100% surface inspection via CCD cameras.

Quality tests include intergranular corrosion (ASTM A262 Practice E), tensile testing, and surface roughness profiling.

Applications by Surface Finish

1. 2B Finish

• Food processing equipment (hoppers, trays)
• Industrial cabinets and enclosures
• Chemical storage tanks
• Automotive trim (non-visible parts)

Advantage: Cost-effective, good corrosion resistance, easy to fabricate.

2. BA (Bright Annealed) Finish

• Surgical instrument blanks
• Pharmaceutical fluid manifolds
• Cleanroom wall panels
• Sensor membranes and diaphragms

Advantage: Mirror-like surface without embedded contaminants; ideal for sterile environments.

3. Bright Polished Finish

• Luxury appliance fronts (refrigerators, dishwashers)
• Architectural accents (elevators, handrails)
• Decorative medical device housings
• Mirror-grade reflectors

Advantage: Highest aesthetic appeal; often used where visual impression matters.

Compliance & Certifications

For regulated industries, documentation is non-negotiable:

Reputable suppliers offer free samples, OEM/ODM customization, and batch traceability via heat numbers.

Why Choose Cold Rolled 316L Over Alternatives?

316L offers the best balance of performance, manufacturability, and regulatory acceptance.

SEO-Optimized Summary (For Google Visibility)

Cold rolled 316L stainless steel strip is widely used in medical, food, pharmaceutical, and precision engineering industries due to its superior corrosion resistance, biocompatibility, and surface finish options. Available in 2B (matte), BA (bright annealed), and bright polished finishes, these coils comply with ASTM, JIS, GB, and EN standards. With thicknesses from 0.05mm to 3.0mm and standard 508mm inner diameter, they support high-speed automation and stringent hygiene requirements. Ideal for surgical tools, food machinery, sensors, and luxury appliances, 316L stainless steel strips deliver reliability, cleanliness, and global compliance.

Conclusion

Cold rolled 316L stainless steel strip—available in 2B, BA, and bright polished finishes—represents the pinnacle of engineered material solutions for critical applications. Its combination of molybdenum-enhanced corrosion resistance, precision dimensions, and hygienic surface options makes it indispensable across high-value sectors. By aligning with international standards and offering full traceability, manufacturers ensure consistent quality that meets both technical and regulatory demands.