Stainless Steel Round Bar Supplier

Stainless Steel Round Bar

Wide grade coverage: 304/316L/321/2205/904L/17‑4PH for corrosion & high‑temperature service
Dual product forms: hot‑rolled black bar and precision cold‑drawn bright bar
Ultra‑tight tolerance up to ±0.01 mm for precision machining work
Multiple surface treatments: polished, turned, peeled; flexible 3/6/12‑meter fixed lengths

Product Overview

Stainless Steel Round Bar is a solid cylindrical stainless steel bar widely used for corrosion-resistant and high-performance mechanical manufacturing. Manufactured according to GB/T1220, ASTM A276, ASTM A484 and EN10088-3 standards, it provides reliable stainless material solutions for industrial processing and precision component production.

The product is available in two main forms: hot-rolled black surface stainless steel round bar for heavy-duty machining and cold-drawn bright & precision ground round bar for high-precision applications. Hot-rolled bars cover Φ16mm-Φ300mm, while cold-drawn and ground bars cover Φ3mm-Φ120mm with dimensional tolerance as low as ±0.01mm.

Stainless Steel Round Bar supports multiple material grades including 304, 304L, 316, 316L, 321, 310S, 430, 2205, 2507, 904L and 17-4PH, covering requirements for corrosion resistance, mechanical strength and high-temperature service conditions.

With flexible surface treatment options including polishing, turning and peeling, and standard lengths of 3m, 6m and 12m, the product is widely applied in chemical equipment, food processing machinery, marine components, medical implants, pump and valve parts, aerospace precision machining and furnace support structures.

Stainless Steel Round Bar

Chemical & Mechanical Property Snapshot

Grade	Equivalent Standard	C (Max)	Si (Max)	Mn (Max)	P (Max)	S (Max)	Cr	Ni	Mo	Yield Strength (MPa, Min)	Tensile Strength (MPa, Min)	Elongation (%)	Hardness HB (Max)
304	1.4301 / SUS304 / 06Cr19Ni10	0.08	1.00	2.00	0.045	0.030	18.00–20.00	8.00–11.00	—	205	515	40	201
304L	1.4307 / SUS304L / 022Cr19Ni10	0.03	1.00	2.00	0.045	0.030	18.00–20.00	8.00–12.00	—	170	485	40	201
316	1.4401 / SUS316 / 06Cr17Ni12Mo2	0.08	1.00	2.00	0.045	0.030	16.00–18.50	10.00–14.00	2.00–3.00	205	515	40	217
316L	1.4404 / SUS316L / 022Cr17Ni12Mo2	0.03	1.00	2.00	0.045	0.030	16.00–18.50	10.00–14.00	2.00–3.00	170	485	40	217
321	1.4541 / SUS321 / 06Cr18Ni11Ti	0.08	1.00	2.00	0.045	0.030	17.00–19.00	9.00–12.00	—	205	515	40	217
310S	1.4845 / SUS310S / 06Cr25Ni20	0.08	1.50	2.00	0.045	0.030	24.00–26.00	19.00–22.00	—	205	515	40	217
430	1.4016 / SUS430 / 10Cr17	0.12	1.00	1.00	0.040	0.030	16.00–18.00	≤0.75	—	205	450	22	183
2205	1.4462 / SUS329J3L / 022Cr22Ni5Mo3N	0.03	1.00	2.00	0.030	0.020	21.00–23.00	4.50–6.50	2.50–3.50	450	620	25	293
2507	1.4410 / SUS329J4L / 022Cr25Ni7Mo4N	0.03	0.80	1.20	0.035	0.020	24.00–26.00	6.00–8.00	3.00–5.00	550	795	15	310
904L	1.4539 / N08904 / 015Cr21Ni26Mo5Cu2	0.02	1.00	2.00	0.045	0.035	19.00–23.00	23.00–28.00	4.00–5.00	220	490	35	215
17-4PH	1.4542 / SUS630 / 05Cr17Ni4Cu4Nb	0.07	1.00	1.00	0.040	0.030	15.50–17.50	3.00–5.00	Cu: 3.00–5.00	≥1100 (H1025)	≥1160 (H1025)	≥10	372

Detailed Technical Specifications

Item	Specification
Product Name	Stainless Steel Round Bar
Material Type	Stainless Steel
Shape	Solid Round Bar
Manufacturing Standards	GB/T1220, ASTM A276, ASTM A484, EN10088-3
Production Types	Hot-Rolled Black Surface Bar / Cold-Drawn Bright & Precision Ground Bar
Hot-Rolled Diameter Range	Φ16mm-Φ300mm
Cold-Drawn & Precision Ground Diameter Range	Φ3mm-Φ120mm
Precision Tolerance	Up to ±0.01mm
Available Grades	304, 304L, 316, 316L, 321, 310S, 430, 2205, 2507, 904L, 17-4PH
Standard Length	3m / 6m / 12m
Surface Treatment	Polishing, Turning, Peeling
Quality Documentation	Mill Test Certificate including heat number, chemical composition and mechanical test data
Packaging	Seaworthy export bundling to avoid scratching and deformation
MOQ	5 Ton
Payment Terms	T/T, L/C at Sight
Delivery Time	7–15 working days after receiving deposit

Dimension Specification Table

Item	Specification
Hot Rolled Black Surface Stainless Steel Round Bar Diameter	Φ16 mm–Φ300 mm
Cold Drawn & Precision Ground Bright Round Bar Diameter	Φ3 mm–Φ120 mm
Standard Available Length	3 m / 6 m / 12 m
Custom Length	Customized fixed length available according to client requirements
Dimensional Tolerance for Precision Ground Bar	Up to ±0.01 mm
Surface Treatment Options	Polishing, turning, peeling / skin-pass machining

Product Comparison Table

Comparison Item	Stainless Steel Round Bar	Carbon Steel Round Bar	Stainless Steel Square Bar
Material Base	Austenitic / Ferritic / Duplex / Precipitation-Hardening Stainless Steel	Mild & Medium Carbon Steel	Austenitic / Ferritic / Duplex Stainless Steel
Main Advantage	Outstanding corrosion resistance, high- and low-temperature performance, machinability, multiple surface options	Low cost, good weldability, and mechanical strength for general structural use	Flat square profile, easy positioning & fabrication, good corrosion resistance
Typical Grades	304, 304L, 316, 316L, 321, 310S, 430, 2205, 2507, 904L, 17-4PH	Q235B, Q355B, 20#, 45#, S235JR, S355JR	304, 304L, 316, 316L, 2205; custom grades available
Cross Section Shape	Solid cylindrical round bar	Solid cylindrical round bar	Solid square section
Precision Capability	Cold-drawn & ground bar tolerance up to ±0.01 mm; hot-rolled normal tolerance	Standard machining tolerance; no ultra-precision ground option	Standard dimensional tolerance; customized precision available
Surface Options	Polished, turned, peeled, hot-rolled black finish	Black hot-rolled, pickled, painted	Polished, peeled, mill finish
Typical Applications	Chemical equipment, food machinery, marine components, medical parts, aerospace, pump & valve cores, high-temperature furnace supports	Mechanical shafts, general construction, structural frames, machinery base parts	Equipment frames, fixture supports, structural fabrication, architectural components
Recommended Buyer	Manufacturers requiring corrosion-resistant & high-precision solid bar components	General industrial manufacturers, construction & mechanical processing factories	Steel fabrication workshops, structural & equipment frame manufacturers
Density	~7.93 g/cm³	~7.85 g/cm³	~7.93 g/cm³
Weldability	Excellent for austenitic grades; limited for 17-4PH	Excellent	Excellent for austenitic grades

App Market

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Product Packaging

Secure Export Packaging For Safe Handling And Delivery

FAQs

What is Stainless Steel Round Bar used for?

Stainless Steel Round Bar is widely used for chemical equipment components, food processing machinery, marine parts, medical implants, pump and valve components, aerospace machining parts and furnace support structures.

What standards does Stainless Steel Round Bar follow?

The product is manufactured according to GB/T1220, ASTM A276, ASTM A484 and EN10088-3 standards.

What grades are available for Stainless Steel Round Bar?

Available grades include 304, 304L, 316, 316L, 321, 310S, 430, 2205, 2507, 904L and 17-4PH.

Can Stainless Steel Round Bar be supplied for precision machining?

Yes. Cold-drawn and precision ground round bars can achieve tolerance down to ±0.01mm for high-precision machining applications.

What surface treatments are available?

Surface options include polishing, turning and peeling according to customer processing requirements.

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Stainless Steel Round Bar Supplier