ASTM A276 904L Stainless Steel Round Bar

What is the ASTM A276 Specification?

ASTM A276 is a standard specification by ASTM International covering hot-finished or cold-finished stainless steel bars and shapes (rounds, squares, hexagons, and specialized shapes like angles or tees) for corrosion-resistant and high-temperature service. It excludes bars for reforging and includes austenitic, ferritic, and martensitic grades.

 

904L Stainless Steel Round Bar Supplier

GNEE supplies ASTM A276 904L Stainless Steel round bars, corresponding to UNS N08904 and 1.4539 grades. Stock is available in multiple surface conditions, including hot-rolled black, pickled & peeled, and precision ground bright round bars. The available diameter range is 6–200mm, with fixed lengths of 2–6m, and supports customized processing such as fixed-length cutting, turning/polishing, and chamfering.

 

Our 904L stainless steel round bars are produced through a full process route including electric furnace refining + AOD decarburization, high-temperature forging, 1100–1150°C solution annealing, and straightening & finishing. Dimensional tolerance is strictly controlled within ±0.03mm. The surface is free from cracks, inclusions, and scale defects. Each bar undergoes eddy current and ultrasonic non-destructive testing, achieving a finished product qualification rate of up to 99.8%. EN 10204 3.2 material certificates and third-party salt spray test reports are available upon request.

 

SS 904L round bars demonstrate excellent resistance to seawater, chloride ions, and acidic environments. After 72 hours of neutral salt spray testing, no corrosion is observed. In long-term high-temperature and humid conditions, the material is resistant to cracking and failure. Its service life is approximately 5 times longer than standard 304 and 316L grades, significantly reducing maintenance and replacement costs. It is widely used in high-end and severe corrosive environments such as chemical desulfurization systems, offshore engineering, pharmaceutical equipment, and petrochemical pressure vessels.

 

ASTM A276 904l Stainless Steel Round, Bright, Hex, Threaded Bar Chemical Composition

The chemical composition of grade Stainless Steel 904l Round Bar is outlined in the following table

C	Cr	Cu	Mn	Mo	Ni	P	S
Max			Max			Max	Max
0.02	19.0-23.0	2.0	4.0-5.0	23.0-28.0	0.045	0.035	1.0

 

904L Stainless Steel Bars Mechanical Behaviour 

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
				Rockwell B (HR B) max	Brinell (HB) max
904L	490	220	35	70-90 typical	–

 

Physical Properties of 904L Stainless Steel Bars

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (m/m/0C)			Thermal Conductivity (W/m.K)		Specific Heat 0-1000C (J/kg.K)	Electrical Resistivity (n.m)
			0-1000C	0-3150C	0-5380C	at 1000C	at 5000C
904L	8000	200	15.0	–	–	13.0	–	500	850

 

Tolerance Chart of SS 904L Round Bar

Over	Inc	H7 J7 K7	H8 J8 K8	H9 J9 K9	H10 J10 K10	H11 J11 K11	H12 J12 K12	H13 J13 K13
1mm	3mm	0.009	0.014	0.025	0.040	0.06	0.09	0.14
3	6	0.012	0.018	0.030	0.048	0.07	0.12	0.18
6	10	0.015	0.022	0.036	0.058	0.09	0.15	0.22
10	18	0.018	0.027	0.043	0.070	0.11	0.18	0.27
18	30	0.021	0.033	0.052	0.084	0.13	0.21	0.33
30	50	0.025	0.039	0.062	0.100	0.16	0.25	0.39
50	80	0.030	0.046	0.074	0.120	0.19	0.30	0.46
80	120	0.035	0.054	0.087	0.140	0.22	0.35	0.54
120	180		0.063	0.100	0.160	0.25	0.40	0.63
180	250				0.185	0.29	0.46	0.72
250	315					0.32	0.52	0.81
315	400					0.36	0.57	0.89
400	500					0.40	0.63	0.97
500						0.44	0.70	1.10

 

Price List of ASTM A276 Type 904L Round Bar

Product	Size	Price (USD)/Ton
ASTM A276 UNS N08904 Round Bar (Polished)	0.1-500 MM DIA	$1,000-2,000
904L SS Round Bar (Black Finish)	1-800 MM DIA	$2,899.00
Stainless Steel 904L Round Bar (Hot Rolled)	10-600 MM DIA	$2.05 - 2.90 / kg
AISI 904L Round Bar (Solid)	2 MM - 159 MM DIA	$800.00-1,900.00
ASTM A276 grade 904L Round Bars (Hot Rolled)	0.5MM - 500MM DIA	$1,500.00-2,100.00
SS 904L Round Bars (Cold Drawn)	5.5-500MM DIA	$1,200.00-3,800.00
AISI 904L Stainless Steel Round Bar (Annealed Cold Finish)	8-1200 MM DIA	$900.00-2,000.00
1.4539 AISI 904L Round Bars (Cold Finished)	10-2000MM DIA	$1,999.00
904L SS Round Bar (Black Finish)	0.1MM - 500MM DIA	$980.00-1,380.00

 

If you have project-specific requirements for 904L (1.4539) stainless steel bars, we invite you to place an order. GNEE maintains a substantial inventory of popular products for you to choose from. These materials can be processed into various practical forms-including round bars, hexagonal bars, flat bars, square bars, and more. For detailed information regarding chemical composition or to request free samples, please contact our factory immediately. We offer competitive pricing and exceptional service.

Click to Get UNS N08904 Round Bar Prices

 

904L Round Bar Stock Supply Specification 

Supply Range	Description
Standards	ASTM A276, ASTM A479, ASME SA479
Diameter Range	3mm – 500mm (stock mainly 10mm – 200mm)
Length	Standard 6000mm or custom cut-to-length (Precision Cut)
Surface Condition	Black, Pickled, Cold Drawn, Polished / Centerless Ground
Tolerance Grades	h8, h9, h10, h11 (customized based on application precision requirements)

 

Professional Export Packaging Standards

Individual Sleeving/Wrapping: For ground bars or "Bright Bars" with stringent surface finish requirements, we utilize individual PE plastic sleeves or bubble wrap to prevent contact-induced scratches between the bars.
Standard Grade (Woven Bag Wrapping): Bundled round bars are tightly encased in a double layer of waterproof woven fabric; this method is suitable for Full Container Load (FCL) shipments.
Enhanced Grade (Wooden Crate Packaging): (Highly Recommended for 904L) Utilizes fumigation-free wooden crates (compliant with ISPM 15 standards). The round bars are placed inside the crate and secured with surrounding foam or wood shavings. This method provides complete isolation from external impacts and is ideally suited for Less than Container Load (LCL) shipments or long-distance overland transport.