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Steel coils are an essential material used across various industries for their durability, strength, and versatility. Gnee Steel has been a leading manufacturer of premium steel coils in Asia for over 15 years. Compared to alternatives, Gnee steel coils offer higher corrosion resistance, enhanced flexibility for bending and forming applications, as well as improved strength-to-weight ratios. A key factor that sets Gnee apart is its rigorous quality control standards and precision manufacturing processes, ensuring consistent output and reliability across large orders. Key benefits of using Gnee steel coils include the ability to customize coil dimensions and steel grade based on client requirements, shorter lead times, competitive pricing, and additional services like slitting, cutting, and edge trimming before delivery. With properties that enable fabrication into various steel components, Gnee steel coils offer businesses and manufacturers a versatile, high-quality material critical for today’s industrial needs.

Why Choose Gnee Steel Coils Products?

Stringent quality control for consistent and reliable output

Shorter lead times enable rapid delivery to meet production demands

Value-added services like slitting, cutting, edge trimming save time and costs

Customizable dimensions and steel grades for specialized applications

Competitively priced despite higher grade materials

Durable, flexible, and versatile coils suitable for diverse manufacturing uses

What shapes do steel coils have?

  • Round coils: The most typical shape is circular, wound evenly into a cylindrical form. Round coils allow for even cooling and smooth unravelling.
  • Oval coils: Oval steel coils are wound tighter horizontally to create an oval profile. The shape may better suit certain manufacturing needs.
  • Square coils: Square steel coils are tightly wound into a rectangular shape with 90 degree angles. This format enables efficient stacking and storage.
  • Hexagonal coils: Hexagonal coils have a symmetrical six-sided profile, providing better interlocking ability when stacking. The shape also minimizes loose end remnants.
  • Irregular shaped coils: Some specialty steel coils may have an irregular, asymmetric, non-standard shape for specific fabrication requirements.

what’s steel coil specifications?

Sizes

  • Width: Steel coils come in various widths, typically ranging from 600mm to 2500mm. Custom widths can also be produced to meet specific requirements.
  • Thickness: The thickness of steel coils can vary significantly depending on the application, ranging from very thin sheets (as thin as 0.2mm) to thicker plates (up to 25mm or more).
  • Weight: Coils can weigh from a few hundred kilograms to over 20 tons, depending on width, thickness, and steel type.
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Surface Finish

  • Hot-Rolled (HR): Hot-rolled steel has a rough, blue-gray finish and is not free from surface imperfections.
  • Cold-Rolled (CR): Cold-rolled steel provides a smoother surface finish compared to hot-rolled steel. It’s often used where a high-quality surface finish is required.
  • Coated: Steel coils can be coated with various substances for added corrosion resistance, such as zinc (galvanized), aluminum, or a combination of zinc and aluminum (Galvalume).
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Standar

  • ASTM: The American Society for Testing and Materials publishes many standards for steel coil regarding composition, mechanical properties, and quality.
  • EN: The European Standard (EN) includes specifications for hot-rolled and cold-rolled coils with different grades and properties.
  • JIS: The Japanese Industrial Standards also specify requirements for hot-rolled and cold-rolled steel coils.
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Status (or Grade)

Steel grades specify the chemical composition and mechanical properties of the steel. They affect the steel’s strength, ductility, weldability, and other characteristics. Common grades include structural steels (such as ASTM A36), formable grades (such as ASTM A1011), and high-strength, low-alloy grades (such as ASTM A572).

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Packaging

Coils are typically wrapped in waterproof paper or plastic sheeting and are secured with steel strapping to protect them from moisture and other shipping hazards. Packaging specifications can vary depending on the supplier and the end-use requirements.

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Pengujian

  • Mechanical Tests: These include tensile tests, hardness tests, and bend tests to ensure the steel meets the required mechanical properties.
  • Chemical Analysis: To confirm the steel’s composition meets the specified grade.
  • Non-Destructive Testing (NDT): Methods such as ultrasonic testing may be used to detect internal flaws.
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Gnee Steel Coil Parameters

ElemenPercentage by Weight
Karbon (C)0.05% – 0.25%
Mangan (Mn)0.30% – 0.60%
Fosfor (P)0.040% max
Belerang (S)0.050% max
Silikon (Si)0.15% – 0.35%
Iron (Fe)Balance
PropertiNilai
Daya tarik400 – 550 MPa
Kekuatan Hasil250 MPa (min)
Pemanjangan20% (min)
Hardness (BHN)137 (Brinell)

Steel Coil Thickness Tolerance Table:

Thickness Range (mm)Tolerance (mm)
0.30 – 0.60± 0.03
0.61 – 1.00± 0.04
1.01 – 1.50± 0.05
1.51 – 2.00± 0.06
2.01 – 2.50± 0.07
2.51 – 3.00± 0.08
3.01 – 4.00± 0.09
4.01 – 5.00± 0.10

Steel Coil Width Tolerance Table

Width Range (mm)Tolerance (mm)
Up to 600± 5
601 – 1200± 6
1201 – 1500± 7
1501 – 1800± 8
1801 – 2100± 9
2101 – 2400± 10
KetebalanToleranceLebarTolerancePanjangTolerance
0.1~0.2±0.01520~1000±2.020~2000±2.0
0.2~0.3±0.0220~1000±2.020~2000±2.0
0.3~0.5±0.0320~1000±2.020~2000±2.0
0.5~0.8±0.0420~1000±2.020~2000±2.0
0.8~1.0±0.0620~1000±2.020~2000±2.0
1.0~1.5±0.0820~1000±1.020~2000±1.0
1.5~2.0±0.1020~1000±1.020~2000±1.0
2.0~3.0±0.1220~1000±1.020~2000±1.0
3.0~5.0±0.1520~1000±1.020~2000±1.0
5.0~8.0±0.1820~1000±1.020~2000±1.0
8.0~12.0±0.2020~1000±1.020~2000±1.0
12.0~15.0±0.5020~1000±1.020~2000±1.0
15.0~2.0±0.8020~1000±1.020~2000±1.0

Steel Coil For Sale Features

Steel coils are known for their exceptional strength and durability. They can withstand extreme conditions, making them suitable for use in construction and structural applications where durability is critical.

The versatility of steel coils is unmatched. They can be used in a wide range of applications, including automotive, construction, appliances, and many more. This versatility comes from the ability to adjust the steel’s properties through various processes such as heat treatment and alloying

Many steel coils are designed to resist corrosion, making them ideal for use in environments where exposure to elements could lead to deterioration. Special coatings, such as galvanizing (zinc coating), can enhance this resistance further

Steel coils can be cut and shaped into various forms and sizes, allowing for flexibility in design and application. This makes them suitable for customized projects or applications where specific dimensions are required.

The coiled design makes steel easier to transport and store compared to other forms, reducing logistics costs and space requirements.

Excellent Steel Coil Applications

Steel coils are utilized across a broad spectrum of applications, leveraging their unique properties to fulfill various industrial, commercial, and consumer product needs. Here are some of the most common applications of steel coils:

  1. Konstruksi dan Infrastruktur: Steel coils are extensively used in the construction industry for structural components such as beams, columns, and the framing of buildings. They are also used in the manufacturing of metal roofing, wall cladding, and decking floors.
  2. Automotive Industry: In the automotive sector, steel coils are used to manufacture body parts, frames, and various components of vehicles. The material’s strength and durability make it ideal for ensuring vehicle safety and longevity.
  3. Appliances: Steel coils are a key material in the production of many household appliances, including refrigerators, washing machines, dryers, and ovens. Their ability to withstand high temperatures and resist corrosion makes them suitable for these applications.
  4. Manufacturing of Machinery and Equipment: Industrial machinery and equipment often require steel coils for structural components, casings, and various other parts due to their strength and resistance to wear and tear.
  5. Energy Sector: In the energy industry, steel coils are used in the construction of pipelines, wind turbines, and other infrastructure. Their durability is crucial for ensuring the longevity and reliability of energy production and transmission systems.
  6. Pembuatan kapal: The shipbuilding industry relies on steel coils for the construction of ship hulls, decks, and other structural components. The material’s strength and resistance to harsh marine environments are vital for the safety and durability of vessels.
  7. Packaging: Steel coils are used to produce metal packaging materials, including cans, containers, and caps. The material’s ability to be easily shaped and its resistance to corrosion make it suitable for packaging a wide range of products.
  8. Furniture and Fixtures: In the furniture industry, steel coils are used in the manufacturing of metal furniture and fixtures, providing strength, durability, and a modern aesthetic.
  9. Railroad Tracks: High-strength steel coils are used in the production of railroad tracks. Their durability and resistance to wear are essential for maintaining the safety and efficiency of rail transportation.
  10. Electronics: In electronics, thin steel coils are used in various components and casings, offering protection and durability while maintaining lightweight characteristics.

FAQs About Steel Coils

Hot-rolled steel coils are formed at high temperatures and have a rough surface, whereas cold-rolled steel coils are rolled at room temperature, offering a smoother finish and more precise dimensions.

Yes, steel coils can be tailored in terms of size, thickness, and coating to meet the specific requirements of various applications.

Mengapa Memilih Gnee Baja

Jika Anda ingin mencari produsen produk baja yang terpercaya, Gnee akan menjadi pilihan terbaik Anda. 15 tahun pengalaman produsen produk baja, disertifikasi oleh masyarakat klasifikasi, CE, ISO, dan SGS. Dan kami menjamin standar keamanan dan kualitas tertinggi. Kami memenuhi semua persyaratan lembaga klasifikasi terkenal.
SERTIFIKAT

Selain itu, baja kami telah berhasil diekspor ke lebih dari 60 negara seperti Jerman, Korea Selatan, Amerika Serikat, Meksiko, dan Argentina. Banyak pelanggan tetap datang mengunjungi perusahaan dan pabrik kami dan membuat banyak pesanan.

TAMPILAN PERUSAHAAN MITRA
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PENGUKURAN DAN UJI KUALITAS2
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PENGUKURAN DAN UJI KUALITAS1
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  • Inspeksi Dimensi: Panjang, lebar, diameter; Ketebalan, kelurusan; Kerataan, profil;
  • Inspeksi Permukaan: Inspeksi visual; Pengujian kekasaran; Pengukuran ketebalan lapisan;
  • Pengujian Komposisi: Analisis unsur interstisial – C,S,P, Si; Verifikasi penilaian paduan; Peringkat inklusi;
  • Pengujian Mekanis: Kekuatan tarik, kekuatan luluh; Ketangguhan, keuletan; Pengujian kekerasan;
  • Deteksi Cacat: Ultrasonik, pengujian radiografi; Partikel magnetik, pengujian penetran pewarna;
  • Dokumentasi: Laporan inspeksi; sertifikat uji; Ketertelusuran material
PERmesinan-DAN-FINISHING1
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PEMESAN-DAN-FINISHING2
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  • Pemesinan CNC – pembubutan, penggilingan, pengeboran
  • Perawatan permukaan seperti pemolesan
  • Perawatan panas – pendinginan, anil
  • Lapisan basah/bubuk
JASA PEMOTONGAN3
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JASA PEMOTONGAN1
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JASA PEMOTONGAN2
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  • Pemotongan jet air
  • Pemotongan laser
  • Pemotongan plasma
  • Mencukur/meninju
CETAKAN-DAN-MANUFAKTUR3
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CETAKAN DAN MANUFAKTUR1
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  • Bergulir
  • Tekan pengereman
  • Pembengkokan pelat – cekung & cembung
  • Pembengkokan profil - fabrikasi khusus sesuai gambar
PENGUJIAN DAN INSPEKSI3
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PENGUJIAN DAN INSPEKSI1
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PENGUJIAN DAN INSPEKSI2
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  • Analisis kimia
  • Pengujian mekanis
  • Pemeriksaan non-destruktif
  • Ultrasonik, pengujian radiografi

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