Stainless steel sheet/plate,309/309S Hot Rolled Plates, Stainless Steel 309/309S Cold Rolled Plate, SS309/309S Perforated Plates,309/309S Stainless Steel Plates, 309/309S Decorative Plates

309/309S Stainless steel sheet/plate

Alloy 309 (UNS S30900) is an austenitic stainless steel developed for use in high temperature corrosion resistance applications. The alloy resists oxidation up to 1900°F (1038°C) under non-cyclic conditions. Frequent thermal cycling reduces oxidation resistance to approximately 1850°F (1010°C).

309S (UNS S30908) is the low carbon version of the alloy. It is utilized for ease of fabrication. 309H (UNS S30909) is a high carbon modification developed for enhanced creep resistance. It most instances the grain size and carbon content of the plate can meet both the 309S and 309H requirements.Alloy 309 can be easily welded and processed by standard shop fabrication practices.

Product Details

Product Name	Stainless Steel Sheets/Plates Grade 309
Thickness	0.3mm-3mm or 3mm-30mm
Width	20mm-1500mm or as required
Length	1500-6000mm or as required
Standard	ASTM/AISI ,AFNOR,BS,UNS,GB
Technique	Cold rolled/Hot rolled
Surface Treatment	2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, chequered, embossed, hairline, sand blast, Brush, etching, Hot rolled plate (HR), Cold rolled sheet (CR), SATIN (Met with Plastic Coated) etc
Thickness Tolerance	±0.01mm~ ±0.25mm
Material	309/309S
Application	It is mainly used in chemical industry, petroleum, petrochemical and automotive industries.
MOQ	1 ton , We can accept sample order.
Shipment Time	Within 15-20 workdays after receiving deposit or workable L/C
Export Packing	Standard Export Seaworthy Package.Suit for all kinds of transport,or as required
Capacity	250,000 tons/year

Chemical Composition:

Weight % (all values are maximum unless a range is otherwise indicated)

Element	309	309S	309H
C	0.2	0.08	0.04 min.-0.10 max.
Si	0.75	0.75	0.75
Mn	2.0	2.0	2.0
S	0.03	0.03	0.03
P	0.045	0.045	0.045
Cr	22.0 min.-24.0 max.	22.0 min.-24.0 max.	22.0 min.-24.0 max.
Ni	12.0 min.-15.0 max.	12.0 min.-15.0 max.	12.0 min.-15.0 max.

Mechanical Properties :

Typical Values at 20°C

Yield Strength		Ultimate Tensile		Elongation	Hardness
0.2% Offset		Strength		in 2 in.	Hardness
psi (min.)	(MPa)	psi (min.)	(MPa)	% (min.)	(max.)
45,000	310	85,000	586	50	202 (HBN)

Corrosion Resistance

Wet Corrosion
Alloy 309 is not designed for service in wet corrosive environments. The high carbon content, which is present to enhance creep properties, has a detrimental effect on aqueous corrosion resistance. The alloy is prone to intergranular corrosion after long term exposure at high temperatures. However, due to its high chromium content (23%), Alloy 309 is more corrosion resistant than most heat resistant alloys.

High Temperature Corrosion
Alloy 309 resists high temperature corrosion in most in-service conditions. Operating temperatures are as follows:

Oxidizing conditions (max. sulfur content – 2 g/m3)
1922°F (1050°C) continuous service
2012°F (1100°C) peak temperature

Oxidizing conditions (max. sulfur greater than 2 g/m3)
1742°F (950°C) maximum temperature

Low oxygen atmosphere (max. sulfur content – 2 g/m3)
1832°F (1000°C) maximum temperature

Nitriding or carburizing atmospheres
1562 –1742°F (850 – 950°C) maximum

APPLICATIONS:

Alloys 309 and 309S are used exclusively for their high temperature oxidation resistance, excellent high temperature strength, along with their resistance to creep deformation and environmental attack. Some examples include, but are not limited to:

Heating elements
Aircraft and jet engine parts
Heat exchangers
Carburizing annealing products
Sulfite liquor handling equipment
Kiln liners
Boiler baffles
Refinery and chemical processing equipment
Auto exhaust parts

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