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Stainless Steel Bar and Rod
| MOQ: | 5ton |
| Price: | Based on grade, size, surface, processing, quantity and current raw material market price. |
| Standard Packaging: | Standard seaworthy export packing with bundles, waterproof wrapping, pallets or wooden cases. |
| Delivery Period: | 7-15 |
| Payment Method: | L/C,D/A,D/P,Western Union,T/T |
| Supply Capacity: | Stock supply, regular production and custom manufacturing available. |
Shaanxi Shangyou Stainless Steel Co., Ltd. supplies stainless steel bar and rod for global B2B buyers, machining companies, distributors, equipment manufacturers and project contractors. The range includes round, square, hexagonal and flat products in austenitic, ferritic, martensitic, precipitation-hardening and duplex grades. Instead of treating every bar as interchangeable, we match the grade, product standard, manufacturing condition, dimensional tolerance and inspection package to the final component.
| Purchase Item | Supply Information |
|---|---|
| Grades | 304, 304L, 316, 316L, 303, 321, 347, 410, 420, 430, 17-4PH, 2205, 2507 |
| Product Forms | Round, square, hexagonal, flat and forged bar |
| Typical Size Scope | 3–300 mm for common bar products; larger forged sizes by order |
| Length | 3 m, 6 m, 12 ft, 20 ft, random or cut-to-length |
| Conditions | Hot rolled, annealed, pickled, cold drawn, bright, peeled, turned or ground |
| Standards | ASTM A276, A479, A582, A564, A314; EN 10088-3 |
| Testing | PMI, hardness, dimensional inspection, mechanical testing and UT when specified |
| Documents | EN 10204 3.1; 3.2 or third-party inspection by agreement |
| Processing | Saw cutting, chamfering, turning, centerless grinding, drilling and rough machining |
| Production Status | Stock, regular production or made to order depending on grade and size |
Round bar is the main choice for shafts, pins, valve stems and turned parts. Hex bar supports fastener, fitting and automatic-machining production. Square and flat bar are used in frames, fixtures, structural fabrications and machined blocks. For high-volume machining, cold-drawn or bright bar can reduce stock removal. Large diameters and critical sections may require peeled, turned, forged or ultrasonic-tested material rather than ordinary hot-rolled stock.
The purchase order should state the required grade, UNS or EN number, applicable product standard, shape, dimensions, length, supply condition, surface, tolerance, straightness and heat treatment. ASTM A276 covers common hot- and cold-finished stainless bars, while ASTM A582 is more appropriate for free-machining grades such as 303. ASTM A564 applies to age-hardening bar such as 17-4PH, and ASTM A479 should only be specified when the material is intended for boiler or pressure-vessel construction.
Bars can be band-saw or cold-saw cut to fixed lengths, end-faced, chamfered, drilled, turned or centerless ground. Austenitic grades work-harden quickly, so machining should use rigid tooling, positive cutting geometry, sufficient feed and continuous coolant. Duplex grades require stable setups and controlled heat input. Martensitic and precipitation-hardening grades must be ordered in the correct annealed, solution-treated or aged condition before final machining and heat treatment.
Grade selection must be based on the service environment rather than a generic claim of “excellent corrosion resistance.” 303 improves machinability but has reduced pitting resistance and is not preferred for welding or marine exposure. 304 is a general-purpose grade but is not a universal chloride-service material. 316L offers better pitting resistance than 304, while 2205 and 2507 provide higher strength and better chloride stress-corrosion resistance when correctly solution annealed. Final suitability depends on temperature, chloride level, pH, stress, crevices and fabrication history.
| 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 |
- CNC-machined components
- Pump shafts and valve stems
- Fasteners and fittings
- Food and pharmaceutical equipment
- Chemical and marine machinery
- Industrial frames and fabrication
Send the grade, shape, dimensions, condition, quantity and end use. Shangyou will confirm the applicable standard, manufacturing route, processing allowance, inspection plan and export packing before quotation.
Request a Quote · Send Your Size List · Upload Drawing or MTO · Confirm Grade and Condition
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What is the difference between stainless steel bar and rod?
In industrial purchasing, bar normally refers to straight solid products with controlled cross-sections. Rod may refer to smaller straight bar or coiled rod depending on the market. The drawing, size, condition and standard should be stated to avoid ambiguity.
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Which shapes are available?
Round, square, hexagonal and flat bars are the main forms. Forged round bar and custom-machined blanks can also be supplied subject to grade, size and MOQ.
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Which standard should I specify?
Use ASTM A276 for general stainless bars, ASTM A582 for free-machining grades, ASTM A564 for age-hardening bars and ASTM A479 only for boiler or pressure-vessel applications. EN 10088-3 is common for European orders.
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Can bars be supplied with MTC 3.1?
Yes. EN 10204 3.1 material certificates can include heat number, chemical composition, mechanical properties and heat-treatment details. Additional reports should be stated in the order.
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Can you provide PMI testing?
PMI can be arranged for grade verification. XRF is useful for alloy identification but cannot independently confirm low-carbon L grades or all light elements; OES or laboratory chemistry may be required.
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What finishes are available?
Typical conditions include hot rolled, annealed and pickled, cold drawn, bright, peeled, turned, polished and centerless ground.
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Can you cut bars to exact length?
Yes. Band-saw and cold-saw cutting are available. Length tolerance, squareness, burr condition and machining allowance must be agreed before production.
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How should I select 304 or 316L?
304 suits many general indoor and mildly corrosive applications. 316L adds molybdenum for improved pitting resistance, but actual suitability still depends on chloride concentration, temperature and crevice conditions.
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Are all grades held in stock?
No. Common 304 and 316L sizes may be stocked, while duplex, super duplex, high-temperature and precipitation-hardening grades are often regular production or made to order.
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What information is required for a quotation?
Provide grade, standard, shape, dimensions, length, quantity, surface, tolerance, heat-treatment condition, testing requirements, end use and destination port.
