1. Descripción general
AISI 420 acero inoxidable, also known as 3Cr13 o SUS420J2, is a acero inoxidable martensítico containing about 13% cromo.
It offers an excellent combination of dureza, resistencia al desgaste, y resistencia a la corrosión after appropriate heat treatment, making it a preferred material for herramientas de corte, cuchillas, and mechanical wear parts.
Jiaxiao MTC manufactures AISI 420 tiras de acero inoxidable en cold rolled annealed y curtido & templado conditions, with polished or bright finishes to meet the highest precision standards.
2. Chemical Composition and Equivalent Grades
| Estándar | Equivalent Grades | C (%) | Minnesota (%) | Y (%) | cr (%) | En (%) | P max | S max |
|---|---|---|---|---|---|---|---|---|
| DE | 3Cr13 | 0.25–0.35 | ≤1.50 | ≤1.00 | 12.0–14.0 | — | ≤0,035 | ≤0,035 |
| AISI | 420 | — | — | — | — | — | — | — |
| ÉL | SUS420J2 | — | — | — | — | — | — | — |
The relatively high chromium content provides good corrosion resistance, while the moderate carbon level ensures the ability to achieve high hardness (up to 50–52 HRC) Después de enfriar y templar.
3. Manufacturing and Processing
Jiaxiao MTC employs a full range of processing steps to ensure the highest quality surface finish and dimensional accuracy:
- Raw Material Selection:
Only ISO-certified hot rolled coils are used as the starting material. - Acid Pickling:
Removes oxides and surface impurities for uniform rolling. - Laminado en frío:
Reduces thickness with precise tolerance control. - Recocido:
Conducted in a controlled atmosphere to prevent decarburization and achieve a bright surface. - Hardening and Tempering:
- Hardening temperature: 980–1050°C
- Tempering temperature: 150–370°C
- Results in high hardness with retained corrosion resistance.
- Surface Finishing and Edge Treatment:
Available finishes include brillante, pulido, or mirror, and edges can be abertura, redondeado, or square.
4. Propiedades mecánicas
| Condición | Dureza | Resistencia a la tracción | Acabado superficial | Edge Type |
|---|---|---|---|---|
| recocido | ≤200 HV | 600–800 N/mm² | Brillante / Espejo | Abertura / Mill |
| Curtido & Templado | 40–52 HRC | 1300–1600 N/mm² | Pulido / Brillante | Redondeado / Square |
Rango de grosor: 0.1–5.0 mm
Width Range: arriba a 500 milímetros
5. Key Characteristics
- Resistencia a la corrosión:
Excellent in dry air, freshwater, mild acids, and alkalis. - Hardness and Wear Resistance:
High hardness achievable after quenching; ideal for cutting edges and mechanical wear parts. - Polishability:
Liso, brillante, and mirror surface finish possible for decorative or precision applications. - maquinabilidad:
Good machinability in annealed condition; easy to harden for final performance. - Dimensional Accuracy:
Maintained through precision cold rolling and levelling.
6. Typical Applications
AISI 420 tira de acero inoxidable is widely used across various industries that require both resistencia mecánica y surface durability:
- Herramientas de corte & Blades:
Cuchillas, trowel blades, scrapers, espátulas, and scissors. - Componentes industriales:
Wear-resistant spacers, shims, lavadoras, and clips. - Automotive Applications:
Seatbelt parts, discos de embrague, and decorative trims. - Shoe Hardware & Accessories:
Toe caps, shoe shanks, and insole supports.
7. Quality Control and Standards
Jiaxiao MTC follows strict quality assurance procedures throughout production:
- Chemical Composition Testing — confirmed via spectrometer.
- Hardness Testing — Vickers, Rocoso, and Brinell methods.
- Flatness and Straightness — controlled within tolerance classes R1–R4.
- Surface Inspection — mirror and polished surfaces free from oxidation or pitting.
Tolerancia de grosor: ±0.015–0.070 mm
Tolerancia de ancho: ±0.20–0.80 mm
8. Embalaje y entrega
Each coil is:
- Lightly oiled to prevent corrosion,
- Wrapped in plastic film and anti-rust paper,
- Packed in wooden pallets or steel frames for export,
ensuring safe arrival in perfect condition.
9. About Jiaxiao MTC
Guangzhou Jiaxiao Material Technology Co., Limitado.
specializes in acero de alto carbono, aleación de acero, y tiras de acero inoxidable for global industrial use.
With advanced rolling, recocido, and polishing facilities covering 25,000 m² and over 100 skilled staff, Jiaxiao MTC provides confiable, high-quality steel materials for manufacturers in the tooling, automotor, and hardware sectors.
Annual production capacity exceeds 15,000 montones.
