Distinguishing Galvanised Steel Sheet Sumikin, Dong A, Hoa Sen, Nam Kim – Which Type to Choose for Construction Project?
What is Sumikin galvanised steel sheet? Origin and production standards
Sumikin galvanised steel sheet is a common market term for galvanised steel produced by the China Steel & Nippon Steel Vietnam (CSVC) plant. This is a joint venture between China Steel Corporation (Taiwan) and Nippon Steel (Japan), two major steel groups in Asia.
The CSVC plant specializes in producing cold-rolled steel, hot-dip galvanised steel, alloy-coated steel, and high-quality steel sheets used for industry, precision mechanics, electrical equipment, automobiles, and export.
Because the plant was previously named China Steel Sumikin Vietnam, the market still commonly refers to it as Sumikin steel sheet or Sumikim steel sheet.
Sumikin galvanised steel sheet structure
Sumikin galvanised steel sheet is produced from cold-rolled base steel (CR steel), then galvanised by continuous hot-dip galvanising.
Structure includes:
- High-precision cold-rolled base steel layer
- Galvanised coating layer on both sides
- Anti-oxidation surface treatment layer
- Anti-rust oil layer or passivation
Thanks to strict control processes, Sumikin's coating thickness and base steel thickness are usually very stable, with smaller deviations compared to many common products on the market.
Technical specifications of Sumikin galvanised steel sheet
CSVC galvanised steel sheet is usually produced according to international industrial standards such as JIS, ASTM, EN, or the plant's own standards.
- Common coating weight: Z60, Z80, Z100, Z120, Z180, Z275
- Common thickness: 0.3mm – 3.2mm
- Form: coil, sheet, slit
- Surface: small spangle, regular spangle, or zero spangle
- High flatness
- Good coating adhesion
Compared to civil steel sheet, Sumikin galvanised steel has higher uniformity, less warping, fewer deviations, suitable for mechanical fabrication.
Advantages of Sumikin galvanised steel sheet
- Sufficient and stable coating weight
- Beautiful surface, few defects
- Easy fabrication
- High durability
- Meets export standards
- Full CO CQ available
Therefore, Sumikin steel sheet is often used in construction projects requiring high standards or products requiring high precision.
Applications of Sumikin galvanised steel sheet in practice
- Precision mechanical fabrication
- Electrical equipment manufacturing
- Electrical cabinet manufacturing
- Industrial steel structures
- Export fabrication
- Component manufacturing
- Stamped steel, bent steel
In many cases, construction projects requiring CO CQ documents or materials according to Japanese, Taiwanese, or European standards often prioritize using CSVC steel instead of civil steel sheet.
Why does Sumikin steel sheet have a higher price?
The price of Sumikin galvanised steel sheet is usually higher than Dong A, Nam Kim, or Hoa Sen due to:
- High-quality base steel
- Strict thickness control
- Sufficient coating weight according to standards
- Industrial production process
- Suitable for export
Although the price is higher, its stability and durability are better, helping reduce risks during fabrication and use.
What is Dong A galvanised steel sheet? Popular galvanised steel sheet brand in Vietnam
Dong A galvanised steel sheet is a galvanised steel product manufactured by Dong A Steel Sheet Joint Stock Company, one of the largest coated steel sheet plants in Vietnam. Dong A Steel Sheet products are widely used in construction, industry, mechanics, and equipment manufacturing due to stable quality and widespread availability.
Compared to industrial coated steel lines like CSVC or imported steel, Dong A steel sheet belongs to the group of materials with good quality, reasonable price, and suitable for most construction projects in Vietnam.
Production process of Dong A galvanised steel sheet
Dong A galvanised steel sheet is produced from cold-rolled steel, then galvanised by continuous hot-dip galvanising. This is a common method in the coated steel sheet industry.
Main steps:
- Cold-rolled base steel
- Degreasing and surface cleaning
- Hot-dip galvanising
- Cooling and coating weight control
- Anti-oxidation treatment
- Anti-rust oil coating
Thanks to modern production lines, Dong A steel sheet has fairly good uniformity, meeting requirements for construction and general fabrication.
Common technical specifications of Dong A galvanised steel sheet
- Common coating weight: Z60, Z80, Z100, Z120, Z180, Z275
- Thickness: 0.3mm – 3.0mm
- Form: coil, sheet, slit
- Surface: spangle or zero spangle
- Standards: JIS / ASTM / TCVN
Dong A steel sheet has many specifications, is easy to purchase, easy to replace, suitable for most needs in the construction and mechanical industries.
Advantages of Dong A galvanised steel sheet
- Stable quality
- Reasonable price
- Abundant supply
- Easy fabrication
- Relatively standard coating weight
- Suitable for civil and industrial construction projects
Compared to high-grade steel lines like CSVC, Dong A steel sheet has slightly lower precision, but in return, it has a better price and is easier to use.
Applications of Dong A galvanised steel sheet
- Steel sheet roofing
- Workshops
- Steel structures
- Sheet fabrication
- Door manufacturing
- Mechanical fabrication
- Wall cladding
- Formed and stamped steel
In practice, Dong A steel sheet is a popular choice for construction projects that do not require excessively high standards but still need stable material.
Compare Dong A steel sheet with Sumikin steel sheet
- Sumikin: high quality, high price, used for industry
- Dong A: good quality, average price, used for construction
If the construction project requires CO CQ or high standards, CSVC should be used. If it is a civil construction project or factory, Dong A steel sheet is a reasonable choice.
What is Hoa Sen galvanised steel sheet? A popular galvanised steel sheet product in civil construction.
Hoa Sen galvanised steel sheet is a galvanised steel product manufactured by Hoa Sen Group, one of the largest steel sheet manufacturers in Vietnam. Thanks to its large factory system, high output, and wide distribution network, Hoa Sen steel sheet is very popular in civil construction, roofing, roller doors, and general construction projects.
Compared to industrial coated steel products like CSVC or steel used for precision mechanics, Hoa Sen steel sheet belongs to the common material group, easy to purchase, easy to replace, and reasonably priced.
Hoa Sen galvanised steel sheet production process
Hoa Sen steel sheet is produced from cold-rolled steel, then galvanised using the continuous hot-dip galvanising method. This technology is commonly used in the coated steel sheet industry.
- Cold-rolled base steel
- Surface cleaning
- Hot-dip galvanising
- Coating thickness control
- Cooling
- Anti-rust oil coating
Thanks to the mass production process, Hoa Sen steel sheet has good stability, but its precision is often not as high as industrial steel products.
Common technical specifications of Hoa Sen steel sheet
- Coating thickness: Z60, Z80, Z100, Z120, Z180
- Thickness: 0.25mm – 2.5mm
- Form: coil, sheet, corrugated steel sheet
- Surface: galvanised spangle
- Standard: TCVN / JIS
Hoa Sen steel sheet has many specifications, is easy to purchase in the market, suitable for construction projects that do not require overly high-grade materials.
Advantages of Hoa Sen galvanised steel sheet
- Easy to purchase
- Reasonable price
- Many dealers
- Suitable for civil use
- Many thicknesses
- Easy to replace
Due to its high popularity, Hoa Sen steel sheet is often used for roofing, doors, walls, small and medium construction projects.
Applications of Hoa Sen steel sheet
- Roofing
- Roofing steel sheet
- Roller doors
- Walls
- Light fabrication
- Civil construction projects
In practice, Hoa Sen steel sheet is rarely used for precision mechanics or export production due to high precision requirements.
What is Nam Kim galvanised steel sheet? A galvanised steel product widely used in mechanics and construction.
Nam Kim galvanised steel sheet is a galvanised steel product manufactured by Nam Kim Steel Company, one of the large coated steel sheet factories in Vietnam. Nam Kim products are widely used in construction, mechanical fabrication, equipment manufacturing, and industry.
Compared to Hoa Sen, Nam Kim is often rated as having equivalent or higher quality in some product lines, especially steel coil used for fabrication.
Nam Kim galvanised steel sheet production process
Nam Kim uses a continuous hot-dip galvanising line, similar to modern steel factories.
- Cold-rolled base steel
- Cleaning
- Hot-dip galvanising
- Coating layer control
- Cooling
- Anti-rust oil coating
Thanks to the industrial production line, Nam Kim steel sheet has good stability, suitable for various uses.
Common technical specifications of Nam Kim steel sheet
- Coating thickness: Z60, Z80, Z100, Z120, Z180, Z275
- Thickness: 0.3mm – 3.2mm
- Form: coil, sheet, slit steel coil
- Surface: galvanised spangle / non-spangle
- Standard: JIS / ASTM / TCVN
Nam Kim has many types of steel used for mechanics, so it is often used for sheet fabrication, stamping, forming, and equipment manufacturing.
Advantages of Nam Kim steel sheet
- Good price
- Easy to fabricate
- Abundant supply
- Fairly stable coating thickness
- Suitable for mechanics
- Suitable for factories
Compared to Hoa Sen, Nam Kim is often used more in sheet fabrication and mechanics.
Applications of Nam Kim steel sheet
- Mechanical fabrication
- Steel structures
- Factories
- Equipment manufacturing
- Export fabrication
- Formed and stamped steel
Nam Kim is a popular choice when stable quality material is needed but the price is not too high.
Compare Sumikin – Dong A – Hoa Sen – Nam Kim galvanised steel sheet
| Type | Quality | Price | Application |
|---|---|---|---|
| Sumikin | High | High | Mechanical, export |
| Dong A | Good | Medium | Factory building |
| Hoa Sen | Stable | Medium | Civilian use |
| Nam Kim | Fair | Soft | Fabrication |
Which type of steel sheet should be chosen?
If the construction project requires high standards, Sumikin or industrial coated steel should be chosen.
If for a regular construction project, Dong A or Nam Kim can be chosen.
If for civilian use, roofs, doors, Hoa Sen can be chosen.
Phu Cuong Steel Sheet – Leading Reputable Large Width Steel Sheet Distributor
Phu Cuong Steel Sheet specializes in supplying galvanised steel sheet, EG steel sheet, GA steel sheet, cold-rolled steel, steel coil with various specifications, especially large widths of 1500mm, rare in the market.
Stock available, with coil slitting machine, bending, cutting on demand, fast delivery in Ho Chi Minh City and other provinces.
- Address: 2177C–2177D QL1A, Dong Hung Thuan Ward, District 12, Ho Chi Minh City
- Phone: 0933 919 899
- Website: tonthepphucuong.com
See more related articles:
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- What is Z galvanised coating? How do Z100, Z180, Z275 differ in steel sheet
- Steel Sheet Distributor in District 12 – Quotation for Galvanised Steel Sheet, EG Steel Sheet, Large Width Steel Sheet at Good Prices in District 12
- What is galvanised steel sheet Z275? Should Z275 be used for all construction projects?