303 Stainless Steel Hex Bar
303 free-machining stainless steel hex bar in cold-drawn condition for turned and milled fittings, fasteners and components where machining productivity is the priority.
Supply routes
- Qualified partner-mill sourcing
- Stock coordination
- In-house production or processing
Grade datasheets:303
Specifications
| Grade | 303 / UNS S30300 |
|---|---|
| Product standard | ASTM A276/A276M |
| Shape | Hexagonal bar |
| Typical across flats | 5–80 mm, subject to source confirmation |
| Condition | Cold drawn / bright |
| Length | Typical reference only: Mill length or cut pieces. Confirm the ordered range and supply route in the quotation. |
| Inspection | Tests required by the purchased standard and supplementary tests explicitly confirmed in the quotation. |
| Commercial basis | Quantity, MOQ, production route and delivery schedule are confirmed for each quotation. |
Dimensions and Tolerances
| Length | Typical reference only: Mill length or cut pieces. Confirm the ordered range and supply route in the quotation. |
|---|---|
| Order basis | Governing product and dimensional standard, delivery condition and any drawing-specific limits. |
| Special tolerances | Must be stated in the RFQ and accepted in the quotation before production. |
Published ranges are technical references, not a live-stock or production-capability promise. The final range, MOQ and delivery schedule are confirmed in the quotation.
Edge or end condition
- Edge or end condition is confirmed from the product form, standard and downstream fabrication need.
Testing and inspection
- Tests required by the governing purchased standard.
- PMI, NDE, corrosion, roughness or other supplementary inspection only when specified and confirmed in the quotation.
Order documents
- Inspection document type and content as ordered.
- Heat or lot traceability and supplementary reports when included in the accepted inspection plan.
Export packaging
- Export packing selected for product form, finish, dimensions, weight and transport route.
- Film, caps, interleaving, skids, cases or moisture protection only as confirmed in the order.
When 303 is appropriate
Sulfur additions improve chip breaking and machining rate compared with 304. The same inclusions reduce corrosion margin and make welding unsuitable for normal production, so the end environment and manufacturing route must both support the choice.
Hex-bar order details
State across-flats dimension and tolerance, corner condition, straightness, length, surface class and any machining allowance. Confirm whether the drawing requires metric or inch stock and whether the finished component will be passivated.
Substitution warning
303 and 304 have similar base chemistry but are not direct substitutes for welded, deeply formed or food-contact components. Review the finished part rather than choosing only by stock availability.
Technical content updated: 2026-07-29
Organizational author: Tsingshan (Shandong) Iron & Steel Co., Ltd..Review method, status and limitations.
Typical Applications
Related technical resources
Grades
Published standards
Applicable standards
ASTM A276/A276M · ASTM A484/A484M
Finishes and processing
What to Include in Your RFQ
Use the published values as a starting point, then identify the exact ordered option and acceptance criteria.
- Grade and governing standard
- 303; ASTM A276/A276M, ASTM A484/A484M. State the exact ordered combination.
- Dimensions and tolerances
- Provide length and identify which order basis, special tolerances requirements govern acceptance.
- Finish, processing and edge or end condition
- ; Stainless Steel Cut-to-Length and Leveling; Edge or end condition is confirmed from the product form, standard and downstream fabrication need..
- Inspection, documents and packing
- Testing: Tests required by the governing purchased standard.; PMI, NDE, corrosion, roughness or other supplementary inspection only when specified and confirmed in the quotation. Documents: Inspection document type and content as ordered.; Heat or lot traceability and supplementary reports when included in the accepted inspection plan. Packing: Export packing selected for product form, finish, dimensions, weight and transport route.; Film, caps, interleaving, skids, cases or moisture protection only as confirmed in the order.
- Quantity, destination and requested delivery window
- State quantity per size, unit, delivery city or port, requested trade term and required delivery window so the supply and freight route can be confirmed.
Frequently Asked Questions
What information is needed to quote 303 Stainless Steel Hex Bar?
Send the grade, governing standard, dimensions, tolerance, finish, quantity, testing, document, packing and destination requirements.
Are the listed 303 Stainless Steel Hex Bar dimensions guaranteed available?
No. Published dimensions are technical references; actual availability, production route, MOQ and delivery schedule are confirmed for each quotation.
Which inspection documents are available for 303 Stainless Steel Hex Bar?
State the required document type and supplementary tests in the RFQ. The exact document package is confirmed before the order is accepted.
RFQ
Request a Quotation
Send the specification you have; we will identify missing inputs before quoting.