Stainless Steel Bar Hub
Compare 303, 304 and 316 bar shapes, finishes, tolerance and trial order paths.
304/304L General-Purpose Bar
304/304L Stainless Steel Bar for
304/304L Stainless Steel Bar for
Stock Supply and Custom Cutting
304/304L stainless steel bar is the standard starting grade for general fabrication, stock replenishment, daily corrosion resistance and simple machined parts. FX Stainless Steel reviews 304 stainless steel round bar, Inox 304 Hex Rod and square bar routes by size, finish, MTC and cutting plan.
304 / 304L
General-purpose grade
Round / Hex / Square
Common forms
Cut-to-length
Routine service
MTC support
Document review
Quick Answer
When is 304/304L stainless steel bar the right starting grade?
304/304L Stainless Steel Bar is the practical first choice for general fabrication, support parts, standard machining, equipment components and stock supply. Choose 304L when lower carbon content matters for welding or fabrication control. Review 303 for easier CNC machining, and review 316/316L for stronger chloride or marine exposure.
Bar Shape / Grade Navigation
Choose the right 304 bar shape and nearby grade
304/304L Stainless Steel Round Bar
Review 304 round bar for shafts, pins, supports and repeat stock supply.
Stainless Steel Hex Bar
Review Inox 304 Hex Rod and hex bar routes for nuts, couplings and fittings.
303 Stainless Steel Bar
Choose 303 when CNC machinability and chip control matter more than general corrosion margin.
316/316L Stainless Steel Bar
Choose 316/316L when chloride, marine or chemical exposure drives the decision.
Stainless Steel Bar Quote
Send grade, shape, size, tolerance, finish, quantity and destination for review.
304 Bar Supply Table
304/304L stainless steel bar supply reference
| Item | Common Scope | Buyer Note |
|---|---|---|
| Grade | 304 / 304L / SUS304 / SUS304L review | Confirm ASTM, JIS, EN or drawing requirement if specified |
| Forms | Round bar, hex bar, square bar | Routine shapes can be reviewed by size, finish and cutting plan |
| Size | Round 3 - 200 mm; hex S5 - S75 mm; square 4 - 100 mm | Final availability depends on stock and finish requirement |
| Finish | Cold drawn, bright, polished, centerless ground | Finish affects tolerance, surface and quote timing |
| Service | Cut-to-length, MTC, labels, export packing | Useful for stock replenishment and project delivery |
Chemical Composition
Typical 304/304L chemical composition reference
The table below is a common ASTM/AISI reference for sourcing discussion. Final values should be checked against the required standard, MTC and heat number before production approval.
| Element | 304 Reference | 304L Reference | Why Buyers Check It |
|---|---|---|---|
| Chromium (Cr) | 18.0% - 20.0% | 18.0% - 20.0% | Main stainless corrosion-resistance element |
| Nickel (Ni) | 8.0% - 10.5% | 8.0% - 12.0% | Supports austenitic structure and toughness |
| Carbon (C) | Max 0.08% | Max 0.030% | Lower carbon helps reduce weld-decay risk |
| Manganese (Mn) | Max 2.00% | Max 2.00% | Common control element in stainless steel |
| Phosphorus (P) | Max 0.045% | Max 0.045% | Should stay within the required standard |
| Sulfur (S) | Max 0.030% | Max 0.030% | Higher sulfur grades are reviewed separately |
| Silicon (Si) | Max 0.75% | Max 0.75% | Common control element in stainless steel |
Data note: composition ranges are common reference values, not a substitute for project standards or batch MTC review.
Equivalent Grades
304/304L stainless steel equivalent grade reference
Buyers may use AISI, JIS, UNS or EN names in the same inquiry. Use this table for sourcing reference only. Final standard follows drawing, PO and MTC.
| System | 304 | 304L | Buyer Note |
|---|---|---|---|
| AISI / ASTM | 304 | 304L | Common wording for 304 stainless steel round bar and general bar supply |
| JIS | SUS304 | SUS304L | Common in Japan-related and Southeast Asia drawings |
| UNS | S30400 | S30403 | Useful for formal material cross-checking |
| EN / Werkstoff | 1.4301 | 1.4307 | Confirm exact EN requirement if the drawing names it |
Standard Naming
Standard naming reference for 304 stainless steel bar
Buyers may describe 304 bar by ASTM, JIS, GB/T, AISI or UNS wording. Use this table for inquiry alignment only. Final standard follows drawing, PO and MTC.
| Buyer Wording | Standard / System | Practical Note |
|---|---|---|
| ASTM A276 304 stainless steel bar | ASTM A276 | Common wording for 304 stainless steel bars and shapes |
| JIS G4303 SUS304 | JIS / SUS | Common for Japan-related and Southeast Asia purchasing language |
| GB/T 1220 06Cr19Ni10 | GB/T 1220 | China standard wording should be checked against MTC and PO |
| AISI 304 / UNS S30400 | AISI / UNS | Useful grade identity wording, not a full order specification by itself |
Do not rely on grade name alone. Confirm size, finish, tolerance, heat number and certificate wording before shipment.
304 vs 304L
304 vs 304L stainless steel bar: practical difference
For many sourcing programs, 304L may be dual-certified with 304. The main buying question is whether lower carbon is important for the part.
| Decision Point | 304 Stainless Steel Bar | 304L Stainless Steel Bar |
|---|---|---|
| Main difference | Standard carbon range | Lower carbon version |
| Typical use | General fabrication, supports, equipment parts | Fabrication where low carbon is requested |
| Welding review | Usable for many jobs, but confirm specification | Often reviewed when welding or heat-affected areas matter |
| Quote note | Usually common stock path | May be supplied as dual-certified material when available |
Applications
Common 304/304L stainless steel bar applications
304/304L bar is usually selected when the buyer needs a balanced stainless grade, not the easiest machining grade or the strongest chloride-resistance grade.
| Application | Common Bar Form | Why 304/304L Fits |
|---|---|---|
| Frames, brackets and supports | Round, square or flat-adjacent bar programs | Balanced corrosion resistance and fabrication fit |
| Equipment shafts and pins | Round bar | Good general-purpose stainless starting point |
| Food and equipment parts | Round or hex bar | Common stainless grade for many clean environments |
| Stock replenishment | Round, hex or square bar | Flexible grade path for general buyers |
| Inox 304 hex rod components | Hex bar | Useful for Southeast Asia buyers quoting across-flats stock |
Quality Review
Check grade, finish and documents before release
A 304/304L quote should make the grade path, size, finish, MTC and packing plan clear before shipment.
MTC and heat number
Material certificate and heat number information can be reviewed by batch.
Cut-to-length
Cutting support can be reviewed based on size, length tolerance and packing needs.
Grade fit
Review 303 for faster CNC machining and 316/316L for chloride or marine exposure.
QA Checklist
QA checklist before 304/304L bar shipment
For 304/304L bar orders, buyers should confirm the grade route, dimensions and packing details before shipment release.
| Check Point | What to Review | Why It Matters |
|---|---|---|
| MTC and heat number | Certificate data should match the shipped batch | Supports traceability for stock and project buyers |
| Grade and chemistry | Review 304 / 304L, SUS304 / SUS304L and key elements | Helps avoid confusion between 304 and lower-carbon 304L |
| Diameter / AF / side / length | Check round, hex, square or cut-to-length dimensions | Reduces receiving and fabrication mismatch |
| Surface and packing photo | Review bright, polished, ground or standard surface condition | Helps buyers confirm visual and handling expectations |
| Labels and bundle marks | Confirm marks, size labels and export packing when required | Useful for warehouse receiving and repeat stock programs |
QA note: third-party inspection, PMI or extra checks can be reviewed when required by the project.
Related Grades
Compare 304/304L with nearby grade and finish paths
303 Stainless Steel Bar
Need easier chip control or faster CNC machining? Review our 303 stainless steel bar page.
316/316L Stainless Steel Bar
Move to 316/316L when the job needs a stronger response to chloride, marine or chemical exposure.
Peeled Stainless Steel Bar
Need cleaner machining stock before final turning? Review the peeled stainless steel bar page.
Centerless Ground Stainless Steel Bar
Need tighter diameter control for 304 shafts or precision turned parts? Review the ground bar page.
Related Reading
Read the practical buying guides around 304 bar supply
304 vs 304L Stainless Steel Bar
See when the low-carbon route really matters for welding, MTC review and bar buying decisions.
Stainless Steel Bar Price Guide 2026 for Southeast Asia Buyers
Use this guide to understand how 304, finish route and destination affect quote logic.
2026 Nickel Supply Alert for 304 Stainless Steel Bar Prices
Understand how nickel supply pressure can affect 304 stainless steel bar buying decisions.
Import Stainless Steel Bars into Vietnam: 2026 Buyer Guide
Useful when 304 round bars are being reviewed for Vietnam projects with ASTM, MTC and document checks.
Stainless Steel Grade Equivalent Lookup
Check 304, SUS304, S30400 and 1.4301 naming before document review.
FAQ
304/304L stainless steel bar FAQ
What is 304 stainless steel bar used for?
304 stainless steel bar is widely used for general fabrication, equipment parts, supports, pins, shafts and stock supply where a balanced stainless grade is needed.
When should I use 304L instead of 304?
304L is often reviewed when lower carbon content matters for welding, fabrication control or project specification.
Is 304 stainless steel bar enough for marine use?
For stronger marine or chloride exposure, buyers usually review 316/316L instead of 304.
Can 304 bar be cut to shorter lengths?
Yes. Cut-to-length support can be reviewed based on bar size, finish, tolerance and packing plan.
Is Inox 304 Hex Rod the same as 304 stainless steel hex bar?
Many Southeast Asia buyers use Inox 304 Hex Rod to describe 304 stainless steel hex bar. FX Stainless Steel reviews it by grade, across-flats size, finish, tolerance and quantity.
Can FX supply 304/304L bar with MTC?
Yes. FX Stainless Steel can review 304/304L bar with MTC, heat number information, labels and export packing.
Send your 304/304L bar requirement.
Share the shape, size, finish, quantity and destination. We will review stock, cutting, MTC support and export packing for your project.
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