Name: 309S / 310S Stainless Steel Bar
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309S / 310S Stainless Steel Bar

309S & 310S heat-resistant stainless steel bars feature high chromium-nickel austenitic composition with exceptional anti-oxidation and thermal stability. 309S suits medium-temperature scenarios, while 310S handles extreme continuous high heat. Both grades serve furnace fixtures, kiln parts and heat treatment equipment, ranking as top-spec materials for Middle Eastern petrochemical industrial projects.

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Product Name	309S / 310S Stainless Steel Bar
Standard	ASTM A276, UNS S30908 / S31008
Material	309S / 310S
Technique	Cold drawn, Hot rolled, Cold rolled and Others.
Common Size Specs	Available forms: Round, square, flat, hexagonal bar Diameter range: 3mm–300mm Hot-selling sizes: 12mm, 20mm, 25mm, 30mm, 50mm Standard length: 3m / 6m, custom cutting available
Surface Treatment	Bright cold drawn finish, centerless ground polished, pickled matte finish, anti-rust oil sealed packaging
Available Material Tempers	Solution annealed (stable high-temperature metallurgical structure) / Hard drawn (high rigidity structural parts)
Origin	China
Price Terms	EXW, FOB, CIF, CRF, CNF or others
Payment Term	TT, LC, Cash, Paypal, DP, DA, Western Union or Others.
Packaging	Bundle, PVC Bag, Nylon Belt, Cable Tie, Standard export seaworthy package or as Request.
Processing Service	Bending, Welding, Decoiling, Punching, Cutting and Others.
Tolerance	±1%
MOQ	5 tons
Exported to	Saudi Arabia, UAE, Qatar; Germany, Poland
Core Strengths	High Cr-Ni alloy structure delivers outstanding oxidation resistance up to 1050°C (309S) and 1150°C (310S) Low-carbon design avoids intergranular corrosion during repeated heating cycles Excellent high-temperature creep strength, retaining structural stability under long thermal operation Resists thermal fatigue and flue gas corrosion in harsh kiln & petrochemical environments Fine machining performance for custom high-temperature fixture processing
Main Applications	Industrial furnace accessories, kiln structural parts, heat treatment tooling, petrochemical high-temperature hardware, incinerator components, thermal processing equipment blanks

If you are interested in buying our ss bar products, please send your grade, size and quantity inquiry to us now, and we will offer best quote for you soon!

Composition of Stainless Steel

Steel is an alloy of iron and carbon. Stainless steels are steels containing at least 10.5% chromium, less than 1.2% carbon and other alloying elements. Stainless steel’s corrosion resistance and

mechanical properties can be further enhanced by adding other elements, such as nickel, molybdenum, titanium, niobium, manganese, etc.

Grade	C	Si	Mn	P	S	Cr	Ni	Mo	N	Cu
201	≤0.15	≤0.75	5.5~7.5	≤0.060	≤0.03	16.00~18.00	3.5~5.5	-	-	0.08
202	≤0.15	≤1.00	7.5~10.00	≤0.060	≤0.03	17.00~19.00	4.0~6.0	-	≤0.25
301	≤0.15	≤1.00	≤2.00	≤0.045	≤0.03	16.00~18.00	6.00~8.00	-
302	≤0.15	≤1.00	≤2.00	≤0.035	≤0.03	17.00~19.00	8.00~10.00	-
304	≤0.07	≤1.00	≤2.00	≤0.045	≤0.03	18.00~20.00	8.00~10.50	-
304L	≤0.030	≤1.00	≤2.00	≤0.045	≤0.03	18.00~20.00	9.00~13.00	-
310S	≤0.08	≤1.00	≤2.00	≤0.045	≤0.03	24.00~26.00	19.00~22.00	-
316	≤0.08	≤1.00	≤2.00	≤0.045	≤0.03	16.00~18.00	10.00~14.00	2.00~3.00
316L	≤0.03	≤1.00	≤2.00	≤0.045	≤0.03	16.00~18.00	12.00~15.00	2.00~3.00
321	≤0.08	≤1.00	≤2.00	≤0.045	≤0.03	17.00~19.00	9.00~13.00	-
430	≤0.12	≤0.75	≤1.00	≤0.040	≤0.03	16.00~18.00		-
2205	≤0.03	≤1.00	≤2.00	≤0.030	≤0.015	22.00~23.00	4.5~6.5	2.5~3.5
2507	≤0.03	≤0.08	≤1.20	≤0.035	≤0.015	24.00~26.00	6.00~8.00	3.0~5.0
904L	≤0.02	≤1.00	≤2.00	≤0.045	≤0.035	19.00~23.00	23.00~28.00	4.0~5.0		1.0~2.0
INCONEL028	≤0.03	≤1.00	≤2.50	≤0.030	≤0.030	≤28.0	≤34.0	≤4.0		≤1.4
MONEL400	≤0.30	≤0.5	≤2.00	-	≤0.024	-	≥63.0	-		≤34.0
INCONEL800	≤0.10	≤1.00	≤1.50	-	≤0.015	≤23.0	≤35	4.0~5.0	-	≤0.75

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