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| Categories | Stainless Steel Bar |
|---|---|
| Standards: | ASTM A276/A479/A582/A564; EN 10088-3 |
| Testing: | PMI, hardness, dimensional inspection, mechanical test and UT for critical diameters |
| Payment Terms: | L/C,D/P,D/A,T/T,Western Union |
| Certification: | ISO 9001 |
| Length: | 1–6 m, 12 ft, 20 ft, random length or fixed cut length |
| Delivery Time: | 7-15 |
| Price: | Based on grade, size, surface, processing, quantity and current raw material market price. |
| Finish: | Hot rolled, black, pickled, cold drawn, bright, peeled, turned, polished, ground |
| Place of Origin: | China |
| Brand Name: | shangyou |
| Grades: | 304/304L, 316/316L, 303, 321, 347, 410, 420, 17-4PH, 2205, 2507 |
| MOQ: | 5ton |
| Model Number: | Stainless Steel Round Bar |
| Diameter: | 3–300 mm common supply; 100–500 mm forged or large-diameter route |
| Packaging Details: | Standard seaworthy export packing with bundles, waterproof wrapping, pallets or wooden cases. |
| Straightness: | Commercial or precision straightness by agreement |
| Supply Ability: | Stock supply, regular production and custom manufacturing available. |
| Tolerance: | Commercial, ISO h9/h10/h11 or drawing-specific where achievable |
| Company Info. |
| Shaanxi Shangyou Stainless Steel Co., Ltd. |
| Verified Supplier |
| View Contact Details |
| Product List |
Shaanxi Shangyou Stainless Steel Co., Ltd. supplies stainless steel round bar for machining, shafting, pump, valve, fastener and industrial equipment applications. Buyers can specify the grade, diameter, length, product condition and dimensional tolerance according to the final part. Common austenitic grades are supplied alongside free-machining, martensitic, precipitation-hardening and duplex materials.
| Purchase Item | Supply Information |
|---|---|
| Grades | 304/304L, 316/316L, 303, 321, 347, 410, 420, 17-4PH, 2205, 2507 |
| Diameter | 3–300 mm common supply; 100–500 mm forged or large-diameter route |
| Length | 1–6 m, 12 ft, 20 ft, random length or fixed cut length |
| Finish | Hot rolled, black, pickled, cold drawn, bright, peeled, turned, polished, ground |
| Tolerance | Commercial, ISO h9/h10/h11 or drawing-specific where achievable |
| Straightness | Commercial or precision straightness by agreement |
| Standards | ASTM A276/A479/A582/A564; EN 10088-3 |
| Testing | PMI, hardness, dimensional inspection, mechanical test and UT for critical diameters |
| Processing | Saw cutting, facing, chamfering, turning, drilling and centerless grinding |
| Documents | MTC 3.1, inspection report and traceable heat number |
The correct manufacturing condition can reduce machining cost. Hot-rolled bar is economical for larger diameters and components with generous machining allowance. Cold-drawn bright bar provides improved diameter control and surface quality for smaller and medium diameters. Peeled or smooth-turned bar removes the hot-worked surface and is often selected for shafting and large CNC blanks. Centerless-ground bar is used where consistent diameter, roundness, straightness and surface roughness are important.
Round bar orders should define diameter rather than nominal pipe size. For final shafts, also state required straightness, runout, surface roughness, machining allowance and whether the ends must be faced or chamfered. Critical rotating or pressure-retaining parts may require ultrasonic examination, hardness testing, macro examination or third-party witnessing in addition to the standard MTC.
Austenitic 304 and 316L should be machined with rigid setups and adequate feed to cut below the work-hardened layer. 303 is preferred when cycle time and chip breaking are primary concerns, but it sacrifices some corrosion resistance and weldability. Duplex 2205 needs controlled cutting parameters because of its higher strength. 17-4PH is commonly rough-machined in Condition A and aged after machining, unless the drawing requires a fully heat-treated condition before final grinding.
A round bar diameter alone does not define fitness for a shaft. The buyer should confirm load, fatigue, wear, corrosion medium, temperature, required heat treatment and final surface condition. Ground diameter tolerances do not automatically guarantee shaft runout after asymmetric machining. For chloride-bearing service, material selection should consider pitting, crevice corrosion and chloride stress-corrosion cracking, not only general corrosion data.
| Grade / Designation | Key Chemistry (wt.%) | Density g/cm³ | Tensile MPa | Yield MPa | Elong. % | Hardness | Heat Treatment / Condition |
|---|---|---|---|---|---|---|---|
| 304 / S30400 / 1.4301 | C≤0.08; Cr 18–20; Ni 8–10.5 | 7.93 | ≥515 | ≥205 | ≥40 | ≤201 HB | Solution annealed; not hardenable by heat treatment |
| 316L / S31603 / 1.4404 | C≤0.03; Cr 16–18; Ni 10–14; Mo 2–3 | 8.00 | ≥485 | ≥170 | ≥40 | ≤217 HB | Solution annealed; rapid cooling after hot work |
| 303 / S30300 / 1.4305 | C≤0.15; Cr 17–19; Ni 8–10; S≥0.15 | 7.83 | Heat/size dependent | Heat/size dependent | Per order | Approx. 160 HB annealed | Annealed; cannot be hardened by heat treatment |
| 2205 / S32205 / 1.4462 | C≤0.03; Cr 21–23; Ni 4.5–6.5; Mo 2.5–3.5; N 0.08–0.20 | 7.80 | 680–880 | ≥450 | ≥30 | ≤28 HRC | Solution annealed 1020–1100°C, water quenched |
| 17-4PH H900 / S17400 / 1.4542 | C≤0.07; Cr 15–17.5; Ni 3–5; Cu 3–5; Nb+Ta 0.15–0.45 | 7.75 | ≥1310 | ≥1170 | ≥10 | Approx. 40 HRC or higher | Solution treated, then aged at 482°C for H900 |
Values are representative engineering references for common conditions. The applicable ASTM/EN standard, section size, ordered condition and MTC control acceptance. Grade 303 is frequently hardness-controlled under ASTM A582, so tensile values should not be assumed without the certified heat data.
| Process / Inspection | Purpose | Ordering Note |
|---|---|---|
| Saw cutting / cold sawing | Fixed lengths and production blanks | State length tolerance, squareness and burr requirement |
| Peeling / turning | Remove hot-worked surface and improve diameter | State final raw size and machining allowance |
| Centerless grinding | Control diameter, roundness and surface | State ISO tolerance, straightness and Ra separately |
| Chamfering / facing | Improve loading, assembly and length control | Provide angle, width, radius or finished length |
| PMI / chemistry verification | Confirm alloy family and heat identity | XRF does not independently confirm L-grade carbon |
| Hardness / mechanical tests | Verify condition and grade requirements | Test method, sampling and condition must match the standard |
| UT / third-party inspection | Evaluate internal quality and witness compliance | Define method, acceptance class, coverage and report |
Send diameter × length, grade, condition, tolerance, straightness, surface and quantity. For finished shafts, include the drawing, machining allowance and required inspection level.
Request a Quote · Send Your Size List · Upload Drawing or MTO · Confirm Grade and Condition
Common straight round bar can be supplied from small precision diameters to approximately 300 mm. Larger sizes are normally produced by forging, rolling, peeling or turning and require grade-specific confirmation.
Hot-rolled bar is economical and suitable for machining with allowance. Cold-drawn bar normally has tighter size control, a brighter surface and higher cold-worked strength.
Peeling removes the hot-rolled surface using a cutting process. It improves surface condition and dimensional consistency while leaving suitable allowance for further turning or grinding.
Selected grades and diameter ranges can be ground or drawn to ISO tolerance classes such as h9 or h10. The exact diameter, length, straightness and surface requirement must be reviewed together.
303 is selected mainly for machinability. Its sulfur addition reduces pitting resistance and weldability, so 316L, duplex or another grade is usually considered for demanding marine exposure.
UT can be specified for large-diameter or critical round bar. The examination standard, acceptance class, scanning coverage and reporting format must be stated in the purchase order.
Yes. Options include saw-cut ends, faced ends, chamfers, center holes and rough-turned ends, subject to drawing review.
For stainless steel near 7.93 g/cm³, approximate kg/m equals diameter² in millimetres multiplied by 0.00623. Use grade-specific density for accurate purchasing calculations.
Yes, subject to size and standard. The order must state the exact aging condition because strength, hardness, toughness and corrosion behaviour change with heat treatment.
Bars are bundled with steel straps and protective wrapping. Precision bars can receive end protection, oil or film protection, wooden cases and separation material to prevent surface damage.
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