ASTM A240 No.4 Brushed Satin Stainless Steel Coil for Fabrication

Shaanxi Shangyou Stainless Steel Co., Ltd. supplies No.4 brushed satin stainless steel coil for global distributors, architectural material processors, equipment manufacturers and industrial fabricators. This product is a cold rolled stainless steel coil processed with abrasive finishing technology to create a uniform brushed surface appearance, commonly supplied according to ASTM A240/A240M stainless steel plate, sheet and strip requirements.

No.4 finish is not a separate alloy grade but a surface condition applied to stainless steel materials including 304/304L (UNS S30400/S30403), 316/316L (UNS S31600/S31603), and 430 (UNS S43000) depending on corrosion requirements and application needs. Shangyou provides customized coil processing, surface protection, inspection documents and export support for B2B customers requiring stable appearance and fabrication performance.

The brushed satin surface is produced after cold rolling, annealing, pickling and mechanical finishing processes. The directional texture helps reduce visible fingerprints and provides a refined appearance for applications where both functionality and aesthetics are required.

No.4 brushed satin stainless steel coil combines the mechanical properties of the selected stainless steel grade with controlled surface finishing technology.

For austenitic grades such as 304 and 316L, chromium provides passive corrosion resistance while nickel improves structural stability and formability. Molybdenum in 316L improves resistance to certain chloride-containing environments, although material selection should still consider actual exposure conditions.

For ferritic grade 430, lower nickel content provides economic advantages while maintaining suitable oxidation resistance and decorative performance for indoor applications.

The No.4 brushed surface offers:

• Uniform directional satin appearance
• Reduced reflection compared with bright finishes
• Good compatibility with forming and fabrication processes
• Easier surface maintenance in commercial environments
• Suitable balance between appearance and practical durability

Carbon content differences between standard and low-carbon grades influence welding performance. Low-carbon materials such as 304L and 316L reduce the risk of sensitization during welding, making them preferred for fabricated components requiring welded joints.

Available specifications are subject to material grade, surface requirement, production capability and order quantity.

No.4 brushed satin stainless steel coil is selected when surface appearance, fabrication performance and corrosion resistance must be considered together.

Typical applications include:

• Elevator interior panels
• Architectural wall decoration
• Commercial kitchen equipment
• Food processing equipment covers
• Stainless steel cabinets and appliances
• Industrial equipment panels
• Decorative fabricated components

1. Corrosive Medium
   Select 304/304L for general atmospheric environments and 316/316L where chloride exposure or chemical contact requires improved resistance. No.4 finish does not change the base metal corrosion mechanism.
2. Temperature and Pressure Conditions
   Confirm service temperature before selection. High-temperature or pressure equipment may require grades and designs beyond decorative stainless applications.
3. Welding Requirements
   For welded structures, low-carbon grades such as 304L or 316L may provide advantages in reducing weld-related corrosion risks.
4. Forming Requirements
   Austenitic grades generally provide good deep drawing and bending performance. Cold working may increase strength and reduce ductility.
5. Surface Requirements
   Buyers should confirm brushing direction, surface uniformity, protective film requirement and acceptable appearance standard before production.
6. Dimensional Tolerance
   Thickness, width and flatness requirements should be confirmed according to fabrication methods.
7. Inspection Documents
   Customers may request MTC 3.1, dimensional reports, surface inspection records and additional testing according to contract requirements.
8. Life Cycle Cost
   Material grade, maintenance environment and replacement frequency should be evaluated together rather than considering initial purchase cost only.

During No.4 brushed satin stainless steel coil processing:

• Surface protection should be applied when required to prevent transportation scratches.
• Brushing direction should remain consistent during fabrication and installation.
• Welding heat input should be controlled according to stainless steel grade requirements.
• Carbon steel contamination should be avoided during handling and storage.
• Surface cleaning methods should match the selected stainless steel grade and service environment.

For quotation and technical evaluation, customers should provide:

• Stainless steel grade
• Coil thickness and width
• Surface requirement
• Brushing direction requirement
• Application environment
• Fabrication method

These details help determine the appropriate material and processing route.

No.4 brushed satin stainless steel coils are packaged according to coil weight, surface protection requirements and transportation conditions. Export packaging may include waterproof paper, protective film, steel straps, edge protection and reinforced supports.

Payment terms are generally arranged through T/T or an irrevocable letter of credit subject to contract review.

Shipment methods may include sea freight, land transportation or other logistics solutions according to destination and contract requirements. Delivery time is confirmed based on production planning and order specifications.

For quality claims, customers should provide relevant documents including heat number, inspection records, package information, photographs and application conditions. Responsibility evaluation will be conducted according to contract terms, approved samples and inspection records.

No.4 brushed satin stainless steel coil is a cold rolled stainless steel coil with a directional satin surface finish created through mechanical abrasive processing. It is widely used where decorative appearance and practical corrosion resistance are required.

No. No.4 is a surface finish designation rather than an alloy grade. It can be applied to stainless steel grades such as 304, 304L, 316L and 430 depending on application requirements.

The stainless steel material is commonly supplied according to ASTM A240/A240M, while general dimensional and surface requirements may refer to ASTM A480/A480M.

Common grades include 304/304L for general applications, 316/316L for improved chloride resistance, and 430 for economical decorative applications.

Yes. No.4 stainless steel coil can be welded using suitable procedures. Low-carbon grades such as 304L and 316L are often selected for welded fabrication.

It depends on the stainless steel grade and environment. 316L may be preferred for coastal or chloride-related conditions, while 304 is commonly used in general atmospheric applications.

The No.4 finish is produced by mechanical grinding or abrasive processing after cold rolling and surface preparation, creating a consistent directional satin texture.

Yes. Protective film and customized surface protection solutions can be provided according to customer handling and fabrication requirements.

Typical documents include MTC 3.1, chemical composition reports, mechanical test reports, dimensional inspection records and packing lists according to contract requirements.

Customers should provide stainless steel grade, thickness, width, quantity, surface finish requirements, application conditions, inspection requirements and packaging preferences.

Need No.4 brushed satin stainless steel coil for architectural, equipment or precision fabrication projects?

Send your requirements including grade, thickness, width, surface specification, quantity and application conditions. Shangyou Stainless Steel provides customized processing, technical support and export solutions for global B2B customers.