The Complete Guide to 304 Stainless Steel Parts

By Jessica Cui · Reviewed by Matthew Wu · Last updated 2026-09-21

Custom 304 stainless steel parts are a top choice for metal buyers worldwide. They offer corrosion resistance, strength, and value for countless applications. This guide covers the material, manufacturing options, and buying essentials. You will also see how our factory delivers quality 304 parts on time.

What Makes 304 Stainless Steel Special?

304 is an austenitic stainless steel grade. It contains about 18% chromium and 8% nickel. That is why it is often called 18/8 stainless steel. This alloy resists rust in most everyday environments.

304 parts are finished components made from this alloy. We cut, form, or join them into their final shape. Common forms include brackets, housings, covers, enclosures, and fittings. Our factory produces them with stamping, deep drawing, laser cutting, bending, and welding.

The grade also has a low-carbon variant called 304L. It performs better after welding in corrosive conditions. Another relative, 316, adds molybdenum for marine-grade protection. Most projects choose 304 for its balanced cost.

Why Buyers Choose 304 Parts

Corrosion resistance. 304 parts resist rust, moisture, and mild chemicals. They last for years in food, beverage, and medical settings.

Strength and durability. The alloy handles stress, vibration, and temperature swings. Parts keep their shape under heavy use.

Formability. 304 bends and draws without cracking. Designers can create complex geometries with confidence. This is why it dominates sheet metal work.

Cost efficiency. 304 costs less than 316. It delivers most of the performance for many applications. That makes it the value pick for custom projects.

Hygiene. Smooth surfaces are easy to clean and sterilize. The food and healthcare industries trust this property daily.

How We Manufacture 304 Stainless Steel Parts

Our team of 120 includes 19 engineers. They review every drawing before production begins. We match the process to your part’s shape and volume. Each method below adds specific value to your parts.

Stamping. We operate 40+ presses from 80T to 400T. High-volume 304 parts come out fast and consistent. Our largest single-point press reaches 400T capacity.

Deep drawing. Our presses form deep, seamless cups and housings. 304 work-hardens during forming, so we use controlled tooling and multiple stages. Experienced setup teams manage this carefully.

Laser cutting. A 6kW laser cuts flat 304 sheets precisely. It handles prototypes and low-to-mid volumes with ease. Complex 2D shapes need no dedicated tooling.

Bending. CNC press brakes shape flanges, angles, and boxes. We hold tight tolerances on critical dimensions. Consistent bend radii keep assembly trouble-free.

Welding. Certified welders join 304 assemblies with clean seams. Correct filler material preserves corrosion resistance. Grinding and polishing follow when required.

Surface finishing. Options include brushing, polishing, and passivation. These improve both appearance and long-term performance.

Years of equipment investment built our full-process capability. Every 304 part moves from raw blank to finished product in our facility. We run all processes in our own factory. Nothing is outsourced to third parties.🔧Click here to view our equipment list.→

Quality runs through every step. We source 304 coils and sheets with full mill certificates. We trace every batch from receipt to shipment. Our ISO 9001:2015 system controls each production step. Dimensional checks verify tolerances on key features. Surface inspection catches scratches, burrs, and contamination.

Where 304 Parts Are Used

304 stainless steel parts appear across nearly every manufacturing sector. Typical applications include:

• Automotive brackets, clips, and sensor housings
• Medical instrument frames and device parts
• Food processing tanks, trays, and conveyors
• Electronics enclosures and mounting plates
• Construction tools, hardware, and fasteners
• Marine fittings and shipbuilding components
• Farming equipment guards and panels
• Firefighting equipment parts

This range explains why 304 is the most used stainless steel grade in the world.

Design Tips for Better 304 Parts

Small design choices can cut cost and improve quality. Keep these principles in mind when you create your drawings.

Keep thickness uniform. Consistent material thickness simplifies tooling. It also reduces forming defects.

Allow enough bend radius. Use an inside radius of at least one times the material thickness. Sharp radii risk cracks in 304.

Space holes from edges. Keep holes away from bends and edges. A safe distance is about two times the thickness. This prevents distortion during forming.

Mark critical tolerances only. Tight tolerances raise cost everywhere. Reserve them for features that truly matter.

Plan for welding. Leave space for weld access and distortion. A short discussion with our engineers prevents surprises.

What to Include in Your RFQ

A clear request gets a faster, more accurate quote. Please provide the following details:

• Drawings in common formats
• Material grade and sheet thickness
• Surface finish requirements
• Quantity and target lead time
• Critical tolerance callouts

Since 1999, we have produced over 70,000 different types of custom metal parts.

Our engineers review manufacturability at no charge. They may suggest design tweaks that reduce cost. In return, you receive a clear price and delivery date.

Frequently Asked Questions

Can you hold tight tolerances on 304 parts? Yes. Stamping and bending typically hold ±0.1 mm. Laser cutting offers similar accuracy on flat features.

Do you make prototypes first? Yes. We recommend prototype approval before mass production. This step avoids costly rework downstream.

Which finish should I choose? It depends on the use and environment. Brushed and polished finishes suit visible surfaces. Passivation boosts corrosion resistance on functional parts.

How long is typical lead time? It depends on complexity and quantity. We confirm exact dates with every quotation.