SS304 Sheet Metal Fabrication Supplier

An SS304 sheet metal fabrication supplier manufactures custom 304 stainless steel sheet metal parts according to customer drawings, 3D models and project requirements.

SS304, also called 304 stainless steel, is one of the most widely used stainless steel materials for industrial sheet metal fabrication. It is commonly selected when buyers need corrosion resistance, clean appearance, good durability and practical fabrication performance.

MSTFAB manufactures custom SS304 sheet metal parts from customer STEP files, STP files, PDF drawings, DXF files, DWG files, assembly drawings and BOMs. We support SS304 sheet metal enclosures, electrical boxes, control box parts, equipment housings, brackets, mounting plates, panels, covers, and machine guards.

When appearance matters, we operate as a precision brushed stainless sheet metal panels manufacturer.

What Is SS304 Sheet Metal?

SS304 is a common austenitic stainless steel grade widely used for sheet metal parts, enclosures, brackets, panels, covers and industrial components. Buyers may describe the material as SS304, SUS304, 304 stainless steel, AISI 304, or 304 stainless sheet metal.

SS304 is popular because it offers a good balance of corrosion resistance, strength, appearance and availability. However, the correct result still depends on drawings, process control and surface protection. Common fabrication processes include laser cutting, CNC bending, hole processing, deburring, welding, grinding, brushing, polishing, passivation, and PEM hardware or threaded insert installation.

Why Buyers Choose SS304 for Sheet Metal Parts

• Corrosion Resistance: SS304 provides better corrosion resistance than cold rolled steel or ordinary carbon steel. It is commonly used when parts face humidity, cleaning, or light outdoor exposure.
• Clean Appearance: SS304 provides a clean, professional stainless steel appearance, especially for visible panels, covers and equipment housings. It can be brushed, polished or finished according to requirements.
• Strength and Durability: SS304 is stronger than aluminum in many applications and more durable than untreated steel.
• Practical Fabrication: SS304 can be laser cut, bent, welded, brushed, polished and assembled into many custom configurations. The key is process planning; it becomes expensive when welding distortion and surface rework are not controlled.

SS304 vs. SS316: Which Material Should Buyers Choose?

SS304 and SS316 are both stainless steels, but they are not the same choice. Choosing the correct grade is critical to prevent premature corrosion while managing material cost.

For marine-grade applications, salt air, or harsh chemical environments, we operate as a specialized SS316 metal fabrication manufacturer.

Laser Cutting SS304 Sheet Metal Parts

Laser cutting is commonly used to produce SS304 profiles, holes, slots and cutouts. It provides clean cuts, but surface protection is crucial to prevent scratching during handling.

CNC Bending and Springback Review

CNC bending forms flat SS304 blanks into brackets, covers, panels, and enclosures. SS304 usually has more springback than mild steel, meaning the metal attempts to return to its original shape after the bending die releases. The bending process must compensate for this springback to achieve accurate angles. Important bending review points include sheet thickness, bend radius, springback, minimum flange length, and hole-to-bend distance. A sharp corner in CAD is not practical; a suitable bend radius prevents surface stress fractures and ensures dimensional repeatability.

Hole-to-Bend Distance for SS304 Parts

Hole-to-bend distance is important in SS304 sheet metal fabrication. If holes, slots or cutouts are too close to the bend line, they may deform during bending, affecting hole roundness, slot shape, screw fit, and hardware installation. A CAD model may show a perfect hole, but real bending may pull or distort it. DFM review identifies these risks early. A design issue found before cutting is a question; a design issue found after 500 stainless steel parts are bent is rework. That is not cost saving. That is cost relocation.

Welding SS304 Sheet Metal Parts

SS304 is commonly TIG or MIG welded for enclosures, housings, frames, brackets and sheet metal assemblies. Welding adds heat. Heat moves metal. That is physics sending an invoice. Welding SS304 may create heat tint, surface discoloration, distortion, warping, and loss of squareness. For welded SS304 parts, drawings should define weld locations, visible weld areas, and post-weld grinding and brushing requirements. A welded stainless steel part can be strong and still be wrong. Strong but crooked is not engineering; it is a heavy problem.

Grinding, Brushing and Polishing SS304 Parts

SS304 parts often require surface finishing after cutting, bending or welding. Operations include deburring, weld seam grinding, heat tint cleaning, corner blending, brushing, and polishing. Brushed SS304 is commonly used for visible panels, covers, doors and equipment housings. Buyers should define the brushing grain direction, visible surfaces, and weld blending requirements. Grain direction matters. If one panel is brushed vertically and another is brushed horizontally, the final assembly will look inconsistent. Polished SS304 requires clear callouts regarding polishing area and surface standard to avoid guesswork.

Hardware Installation in SS304 Sheet Metal Parts

SS304 sheet metal parts often require installed hardware: PEM nuts, PEM studs, PEM standoffs, or rivet nuts and threaded inserts. Hardware installation in SS304 must be reviewed carefully because stainless steel’s work-hardening behavior and hardness affect self-clinching performance. Specialized high-hardness stainless steel fasteners (such as PEM SP series) must be used, and pressing parameters must be controlled to prevent insert spin-out or sheet cracking.

Trust Comparison: Standard Sheet Metal Shop vs. MSTFAB SS304 Manufacturing

Quality Inspection for SS304 Sheet Metal Parts

Quality inspection is important because SS304 parts often have both functional and appearance requirements. Inspection may include material confirmation, sheet thickness check, dimensions, hole positions, bend angles, flatness, surface scratches, burrs, weld quality, brushing direction, and hardware installation. Inspection is not paperwork; it is how buyers avoid turning their assembly line into the final quality department. Critical dimensions and visible surfaces should be clearly marked on drawings.

Prototype and Batch Production

MSTFAB supports prototype and batch production for custom SS304 sheet metal parts. Prototype production helps confirm material grade, thickness, laser profile, hole positions, bend feasibility, weld warping, hardware fit, brushing texture, and assembly fit. Batch production focuses on repeatability. A sample made with heroic manual correction is not manufacturing. It is a magic trick. Magic tricks do not scale. The goal is not one lucky SS304 sample; the goal is a stable manufacturing route. The 500th part should still match the approved version.

Frequently Asked Questions