High Precision 316L / 1.4404 / SUS316L Stainless Steel Strips 0.1mm - 3.0mm for Food and Medical Area

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.

High Precision 316L / 1.4404 / SUS316L Stainless Steel Strips (0.1mm – 3.0mm) for Food and Medical Applications

Introduction

In the demanding sectors of food processing and medical device manufacturing, material integrity, corrosion resistance, and biocompatibility are non-negotiable. Among the most trusted materials meeting these stringent requirements is 316L stainless steel, known internationally as 1.4404 (European standard EN 10088) and SUS316L (Japanese Industrial Standard JIS G4303). High-precision stainless steel strips made from this alloy—ranging in thickness from 0.1 mm to 3.0 mm—are engineered to deliver exceptional performance in hygienic, sterile, and chemically aggressive environments. This article explores the composition, properties, manufacturing standards, applications, and advantages of high-precision 316L stainless steel strips, supported by comparative data tables.

Material Overview: 316L / 1.4404 / SUS316L

316L is a low-carbon variant of the 316 austenitic stainless steel family. The “L” denotes a maximum carbon content of 0.03%, which significantly reduces the risk of sensitization (chromium carbide precipitation) during welding or high-temperature exposure—making it ideal for welded components in critical applications.

Despite minor regional naming differences, 316L (ASTM/UNS), 1.4404 (EN), and SUS316L (JIS) are essentially equivalent in chemical composition and mechanical behavior. All three standards specify strict limits on impurities like sulfur and phosphorus to ensure superior corrosion resistance and formability.

Chemical Composition (Typical, wt.%)

Note: Minor variations exist due to regional standards, but functional performance remains consistent.

The addition of molybdenum (2–3%) is the key differentiator between 316L and 304 stainless steel. Molybdenum dramatically enhances resistance to pitting and crevice corrosion, especially in chloride-rich environments—such as seawater, saline solutions, or cleaning agents used in food plants.

Key Properties for Food & Medical Use

High-precision 316L strips exhibit a unique combination of physical, mechanical, and surface characteristics essential for regulated industries:

1. Corrosion Resistance: Resists organic acids (e.g., citric, lactic), inorganic acids (e.g., nitric), and salt solutions encountered in food processing and sterilization.
2. Biocompatibility: Compliant with ISO 10993 and USP Class VI standards for medical implants and devices.
3. Hygienic Surface Finish: Available in finishes such as BA (Bright Annealed), 2B, or custom electropolished surfaces with Ra < 0.2 µm to prevent bacterial adhesion.
4. Non-magnetic (in annealed condition): Critical for MRI-compatible medical instruments.
5. Excellent Formability & Weldability: Enables complex stamping, bending, and laser welding without cracking or loss of corrosion resistance.
6. Thermal Stability: Maintains integrity from cryogenic temperatures up to 870°C (intermittent service).

Dimensional Precision & Tolerances

For applications requiring micron-level accuracy—such as surgical blades, microfluidic channels, or sensor diaphragms—strip thickness tolerance is paramount. High-precision cold-rolled 316L strips are manufactured under strict process control, often exceeding ASTM A480 or EN 10258 standards.

Typical Thickness Tolerances (Cold-Rolled, Annealed & Pickled)

High-precision tolerances are achievable via multi-pass rolling, tension leveling, and laser micrometer monitoring.

Widths typically range from 5 mm to 650 mm, with edge conditions including slit edge (SE), rounded edge (RE), or deburred edge (DE) to prevent micro-tears or contamination.

Manufacturing Process

Producing high-precision 316L strips involves several critical stages:

1. Melting & Casting: Vacuum induction melting (VIM) or AOD (Argon Oxygen Decarburization) ensures ultra-low carbon and minimal inclusions.
2. Hot Rolling: Slabs are heated and rolled into coils (~3–6 mm thick).
3. Cold Rolling: Multiple passes reduce thickness to final dimensions while improving surface finish and mechanical strength.
4. Annealing: Bright annealing in hydrogen-nitrogen atmosphere prevents oxidation and restores ductility.
5. Pickling/Electropolishing: Removes scale and enhances passive chromium oxide layer.
6. Slitting & Inspection: Precision slitting to customer widths; 100% surface inspection via CCD cameras.

Quality assurance includes spectrometric analysis, tensile testing, intergranular corrosion tests (e.g., ASTM A262 Practice E), and surface roughness measurement.

Applications in Food Industry

316L stainless steel strips are indispensable in food machinery due to their resistance to acidic foods (tomato sauce, vinegar), alkaline cleaners (NaOH), and thermal cycling during pasteurization.

Common Uses:

• Conveyor belts and guide rails
• Cutting blades and slicer components
• Seals and gaskets for filling machines
• Heat exchanger fins in dairy pasteurizers
• Components in brewing and wine-making equipment

Regulatory compliance with FDA 21 CFR 178.3297, EC 1935/2004, and 3-A Sanitary Standards is routinely verified.

Applications in Medical Sector

In medical technology, 316L’s biocompatibility and sterilizability make it suitable for both disposable and implantable devices.

Key Applications:

• Surgical instrument components (scissors, forceps)
• Orthopedic implant blanks (bone screws, plates)
• Catheter guidewires and stent precursors
• Diagnostic sensor membranes
• Dental tooling and orthodontic wires

Electropolished 316L strips reduce surface defects, minimizing thrombogenicity and enhancing fatigue life—critical for cardiovascular devices.

Advantages Over Alternatives

*Non-magnetic in annealed state; may become slightly magnetic after cold working.

316L strikes the optimal balance between performance, manufacturability, and cost-effectiveness for mid-to-high-end medical and food applications.

Quality Certifications & Traceability

Reputable suppliers provide:

• Mill Test Reports (MTRs) per EN 10204 3.1 or 3.2
• Full chemical and mechanical test data
• Batch traceability (heat number tracking)
• Certifications: ISO 13485 (medical), ISO 22000 (food safety), ASME BPE

This ensures full compliance with global regulatory frameworks and facilitates audits.

Conclusion

High-precision 316L / 1.4404 / SUS316L stainless steel strips (0.1–3.0 mm) represent the gold standard for components operating in the most hygienic and corrosive environments. Their exceptional corrosion resistance—enhanced by molybdenum—combined with biocompatibility, dimensional accuracy, and surface quality, makes them irreplaceable in food processing equipment and life-saving medical devices. As industries continue to demand cleaner, safer, and more reliable materials, 316L stainless steel strips will remain at the forefront of advanced engineering solutions.