303 Stainless Steel Sheet – The Free-Machining Champion for High-Speed Production
When your CNC spindle time counts, 303 Stainless Steel Sheet pays for itself every minute. With a deliberate sulfur addition (0.15 % min.), 303 delivers up to three times faster machining than standard 304 while still providing the corrosion resistance needed for indoor, mild-service, or decorative applications. From high-volume automatic screw-machine fittings to designer kitchen backsplashes, 303 Stainless Steel Sheet gives you excellent chip break-up, superior surface finish, and dramatically reduced tool wear—without the costly slowdowns common to 304 or 316 grades.
Key Features & Advantages
- Free-machining sulfur – 2–3× faster production, longer tool life, lower part cost
- Good corrosion resistance for mild atmospheres, food zones, and indoor applications
- Non-seizing / non-galling – ideal for moving screw-machine parts
- Excellent surface finish after turning, milling, or light polishing
- Available in thin gauges (20 Ga–¼") for light-duty cladding or backsplash work
- Full compliance – ASTM A895, EN 1.4305, AMS 5640
- 100 % recyclable, RoHS compliant
Technical Specifications
Table 1 – Chemical Composition (ASTM A895)
| Element | Min % | Max % |
|---|---|---|
| Cr | 17.0 | 19.0 |
| Ni | 8.0 | 10.0 |
| S | 0.15 | 0.35 |
| C | — | 0.15 |
| Mn | — | 2.00 |
| Si | — | 1.00 |
| P | — | 0.045 |
| Fe | Balance |
Table 2 – Mechanical & Physical Properties
| Property | Value |
|---|---|
| Tensile Strength | 620 MPa (90 ksi) min. |
| Yield Strength (0.2 %) | 310 MPa (45 ksi) min. |
| Elongation in 2" | 35 % min. |
| Hardness HRB | 90 – 100 |
| Density | 8.0 g/cm³ (0.289 lb/in³) |
| Thermal Conductivity | 16.2 W/m·K @ 100 °C |
| Magnetic Permeability | < 1.02 (annealed) |
Available Sizes, Gauges & Finishes
| Gauge | Thickness (in.) | Thickness (mm) | Sheet Size (ft) | Finish Options |
|---|---|---|---|---|
| 20 | 0.036 | 0.91 | 4 × 8, 4 × 10 | 2B, No. 4 |
| 18 | 0.048 | 1.22 | 4 × 8, 5 × 10 | 2B, No. 4 |
| 16 | 0.060 | 1.52 | 4 × 8, 4 × 10 | 2B, No. 4, HL |
| 14 | 0.075 | 1.90 | 4 × 8, 5 × 10 | 2B, HL |
| 11 | 0.120 | 3.05 | 4 × 8 | No. 1, HRAP |
| ¼" | 0.250 | 6.35 | 4 × 8, 5 × 10 | No. 1, HRAP |
Custom slit coils, circles, and deburred edges available upon request.
Product Variants & Purchasing Guide
Looking for 303 stainless steel data sheet? Download instantly after RFQ. As a tier-one 303 stainless steel sheet factory located in Jiangsu, China, we publish a transparent daily 303 stainless steel sheet price index linked to LME nickel and sulfur additive costs. Our stockholding program keeps over 1,200 t of 303 stainless steel sheet for sale in standard and non-standard sizes, ready for same-day cutting. Customers searching 303 stainless steel sheet china sources choose us for PED/ISO-certified production, export packaging, and multilingual technical support. Whether you need one pallet of 303 stainless steel 20 gauge sheeting bacplash for a hotel project or a full container of blanks for automotive fittings, you receive the most competitive 303 stainless steel sheet pricelist direct from our 303 stainless steel sheet supplier team—no trader margins.
Main Applications
- Automatic screw-machine bolts, nuts, and studs
- Precision gears, bushings, shafts, and couplings
- Valve and pump trim, pneumatic cylinders
- Kitchen equipment: 303 stainless steel 20 gauge sheeting bacplash, countertops, equipment panels
- Instrument housings, sensor brackets, electronic shields
- Food-processing guides and rails (mild corrosive environments)
- Architectural trim and decorative wall panels
Why Choose Us as Your 303 Stainless Steel Sheet Supplier
- Direct mill relationship – factory gate 303 stainless steel sheet price
- EN 10204 3.1 / 3.2 mill test certificates supplied free
- Third-party inspection: SGS, BV, TÜV on request
- Same-day cutting (shear, laser, water-jet) ±0.1 mm tolerance
- 15 years export experience to 68 countries – anti-fumigation crates, VCI film, insurance
- Live inventory portal updated hourly – always know what is for sale
Grade Comparison Table: 303 vs 304 vs 316 vs 303Se vs 416
| Grade | S Content | Mo | Corrosion | Weldability | Machinability Rating | Typical Relative Cost |
|---|---|---|---|---|---|---|
| 303 | 0.15-0.35 | 0 % | Moderate | Poor | 90 % (excellent) | 1.0× (baseline) |
| 304 | ≤0.030 | 0 % | Good | Excellent | 45 % | 0.95× |
| 316 | ≤0.030 | 2-3 % | Superior | Excellent | 45 % | 1.3× |
| 303Se | Se≥0.15 | 0 % | Moderate | Poor | 95 % | 1.1× |
| 416 | ≥0.15 | 0 % | Poor | Poor | 95 % (magnetic) | 0.9× |
FAQ – 303 Stainless Steel Sheet
-
What is the biggest advantage of 303?
Added sulfur gives up to 3× faster machining and excellent chip control, lowering cycle time and tool costs. -
Can 303 sheet be welded?
Welding is not recommended due to hot-cracking risk; use 304 or 347 for welded assemblies and bolt on 303 parts. -
How does the daily 303 stainless steel sheet price compare with 304?
303 is typically 3-5 % higher than 304 base due to sulfur addition and specialised melting; our live 303 stainless steel sheet pricelist keeps you updated. -
Is 303 stainless steel sheet suitable for a kitchen backsplash?
Yes, 20 gauge No. 4 finish (303 stainless steel 20 gauge sheeting bacplash) offers a decorative, easy-clean surface for low-chlorine indoor environments. -
Which finishes are in stock at the China factory?
2B, BA, No. 4, HL, and micro-peeled; custom polishing up to Ra 0.2 µm available. -
Do you supply a downloadable 303 stainless steel data sheet?
Absolutely – click “Download” on the product page for PDF certified to ASTM A895. -
What thickness tolerance do you guarantee?
ASTM A480/A895 standard tolerances; half-tolerance possible on request. -
How fast can you ship from China?
Standard 7-day lead time plus 3-5 days ocean freight to major ports; air-cargo 48 h for urgent projects.
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Stop paying trader mark-ups. Contact the 303 stainless steel sheet factory directly for today’s lowest 303 stainless steel sheet price, immediate 303 stainless steel data sheet download, and same-day cutting.