Inner Diameter 508mm Stainless Steel Strip Rolls Alloy 316L With ASTM JIS GB EN Standard

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.

Inner Diameter 508mm Stainless Steel Strip Rolls – Alloy 316L Compliant with ASTM, JIS, GB, and EN Standards

Introduction

In precision manufacturing industries—particularly those serving medical devices, food processing, pharmaceuticals, and high-end electronics—the quality, consistency, and dimensional accuracy of raw materials are critical. Among these, stainless steel strip rolls with a standardized inner diameter (ID) of 508 mm (20 inches) have become an industry norm for compatibility with automated slitting, stamping, and forming equipment. When fabricated from Alloy 316L, these rolls offer exceptional corrosion resistance, biocompatibility, and mechanical reliability.

This article provides a comprehensive overview of 508mm ID stainless steel strip rolls made from 316L, detailing their material specifications across global standards—including ASTM (USA), JIS (Japan), GB (China), and EN (Europe)—alongside key technical parameters, manufacturing processes, applications, and comparative advantages. Supporting tables enhance clarity and facilitate cross-standard verification.

Why 508mm Inner Diameter?

The 508mm (20-inch) core diameter is a globally recognized standard in coil handling systems. It ensures:

• Compatibility with universal decoilers and feed lines
• Reduced risk of coil deformation during transport and unwinding
• Optimal tension control in high-speed stamping or laser cutting
• Efficient nesting in logistics and warehouse racking systems

This standardization minimizes downtime and tooling adjustments across multinational supply chains.

Alloy 316L: The Material of Choice

316L stainless steel is a low-carbon, molybdenum-bearing austenitic alloy renowned for its superior performance in aggressive environments. The “L” denotes a maximum carbon content of 0.03%, which prevents chromium carbide precipitation during welding—eliminating intergranular corrosion in heat-affected zones.

Its enhanced resistance to chlorides, acids, and sterilization chemicals makes it ideal for regulated sectors where failure is not an option.

Despite regional naming differences, 316L (ASTM/UNS), SUS316L (JIS), 022Cr17Ni12Mo2 (GB/T), and 1.4404 (EN) are functionally equivalent, with only minor compositional tolerances.

Chemical Composition Comparison (Weight %)

* Note: EN 1.4404 imposes stricter sulfur limits for improved weldability and surface quality.

All four standards ensure the material meets stringent requirements for corrosion resistance, formability, and cleanliness, essential for food-contact and implantable medical applications.

Mechanical Properties (Typical, Annealed Condition)

These properties support deep drawing, fine blanking, and micro-stamping without cracking—critical for producing surgical clips, sensor diaphragms, or precision springs.

Dimensional Specifications of Strip Rolls

High-precision 316L strip rolls with 508mm ID are available in a wide range of thicknesses and widths, tailored to end-use requirements.

Standard Dimensional Range

Thickness Tolerances (Per EN 10258 / ASTM A480)

Precision-grade strips are produced via multi-pass cold rolling with online laser gauging, ensuring uniformity critical for automated assembly lines.

Surface Finishes

Surface condition directly impacts hygiene, aesthetics, and functionality. Common finishes include:

For medical implants or food-contact surfaces, electropolished BA finish is preferred to minimize bacterial adhesion and enhance passive oxide layer integrity.

Manufacturing & Quality Assurance

Production of 508mm ID 316L strip rolls involves:

1. Melting: AOD (Argon Oxygen Decarburization) or VIM for ultra-low carbon and inclusion control.
2. Hot Rolling: Into slabs, then coiled at ~3–6 mm thickness.
3. Cold Rolling: Repeated passes to final gauge with intermediate annealing.
4. Annealing: Bright annealing in controlled atmosphere to restore ductility.
5. Slitting & Recoiling: Precision slitting onto 508mm cores with edge conditioning (deburred or rounded).
6. Inspection: 100% surface scanning, tensile testing, intergranular corrosion tests (e.g., ASTM A262 Practice E), and ultrasonic cleaning validation.

Each coil is assigned a heat number for full traceability from melt to shipment.

Compliance with International Standards

Suppliers typically provide Mill Test Certificates (MTC) per EN 10204 3.1 or 3.2, confirming chemical composition, mechanical properties, and compliance with the requested standard.

Additionally, coils destined for medical use often carry ISO 13485 certification, while food-grade coils comply with FDA 21 CFR 178.3297 and EU 1935/2004.

Applications by Sector

1. Medical Devices

• Guidewires, stent precursors, surgical blades
• Implantable components (bone screws, plates)
• Diagnostic sensor membranes
• Dental orthodontic archwires

Requirement: Electropolished surface, ISO 10993 biocompatibility, non-magnetic

2. Food & Beverage Processing

• Cutting blades for slicers and dicers
• Conveyor belt links and guide rails
• Seals and diaphragms in filling valves
• Heat exchanger fins in pasteurizers

Requirement: Smooth surface (Ra < 0.8 µm), resistance to citric/lactic acid, cleanability

3. Pharmaceutical & Biotech

• Fluid handling components
• Filter housings and membrane supports
• Cleanroom tooling

Requirement: Low particle shedding, steam/SIP compatibility

4. Electronics & Sensors

• MEMS substrates
• Battery current collectors
• Precision springs and contacts

Requirement: Tight thickness tolerance, consistent electrical resistivity

Advantages of Standardized 508mm ID Coils

Conclusion

Stainless steel strip rolls with a 508mm inner diameter made from Alloy 316L represent a convergence of global engineering standards, material science excellence, and industrial pragmatism. Whether designated as 316L (ASTM), SUS316L (JIS), 022Cr17Ni12Mo2 (GB), or 1.4404 (EN), this alloy delivers unmatched corrosion resistance, formability, and hygiene—making it indispensable in life-critical and high-integrity applications.

By adhering to internationally harmonized specifications and leveraging precision rolling technologies, manufacturers ensure that every meter of strip meets the exacting demands of modern medical, food, and advanced manufacturing sectors. As regulatory landscapes tighten and automation accelerates, the 508mm ID 316L stainless steel coil will remain a cornerstone of reliable, scalable, and compliant production worldwide.