» Products » ASTM A240 309S & 310S Plate, Sheet, Strip

ASTM A240 309S & 310S Plate, Sheet, Strip

The ASTM A240 309S & 310S coiled sheets in stock. Manufacturer: TISCO.

  • Description

Corrosion Resistance, Applications, Product Forms

Both 309S and 310S are high chromium and high nickel austenitic stainless steels, primarily developed for use in high temperature and oxidizing corrosion-resistance applications. The UNS designations for 309S and 310S are S30908 and S31008, respectively. The letter “S” stands for special low carbon content of approximate 0.03 to 0.06 in weight percentage. Type 309S resists oxidation up to 1900°F [1038°C] under non-cyclic conditions. Frequent thermal cycling reduces oxidation resistance to about 1850°F [1010°C]. The same holds for Type 310S: it exhibits excellent oxidation resitance up to 2010°F [1100°C] under intermittent-use conditions, while it resists oxidation up to 2100°F [1150°C] under continuous-use conditions.

Decoiling of 309S sheet

The decoiling of ASTM A240 309S sheet in a warehouse, Wuxi city, China.

Type 309S can be used in sulfur containing atmospheres but it is not recommended for use in highly carburizing atmospheres since it exhibits only moderate resistance to carbon absorption. Type 310S is resistant to both sulfidation and moderately carburized atmospheres. In general, both 309S and 310S can be utilized in slightly oxidizing, nitriding, cementing and thermal cycling applications. Especially, 310S also finds usage in cryogenic applications with low magnetic permeability down to -450°F [-268°C]. Both Type 309S and Type 310S can be furnished in flat product forms of plate, sheet, and strip in accordance with ASTM A240. They are widely used for industries such as furnaces, fluidized bed furnaces, paper mill equipment, petroleum refining, power plants, thermal processing, waste treatment, steel plants, sintering/cement plants, ore processing, food processing, and cryogenic components, etc.

Physical Properties

Physical
Properties
ASTM A240
Type 309S
ASTM A240
Type 310S
Density7.89 g/cm37.89 g/cm3
Modulus of
Elasticity
196 GPa196 GPa
Specific Heat
(0–100°C)
502 J/kg-°K502 J/kg-°K
Electrical Resistivity
@20°C
78.0 Microhm-cm78.0 Microhm-cm
Melting Range1480–1530°C1354–1402°C
Thermal Conductivity15.6 W/m-°K10.8 W/m-°K
*Conventional physical properties for ASTM A240 309S and 310S.

Chemical Composition Requirements

ElementType 309S
%
Type 310S
%
C≤0.08≤0.08
Mn≤2.00≤2.00
P≤0.045≤0.045
S≤0.030≤0.030
Si≤0.75≤1.50
Cr22.0–24.024.0–26.0
Ni12.0–15.019.0–22.0
*A revised Schaeffler diagram based on the chemical composition may be used to predict the metallurgical microstructure of ASTM A240 309S and 310S.

Mechanical Properties at Room Temperature

Mechanical Test309S310S
Tensile Strength
min. MPa [ksi]
515 [75]515 [75]
Yield Strength
min. MPa [ksi]
205 [30]205 [30]
Elongation in
2", min. %
4040
Brinell Hardness
max. HBW
217217
Rockwell Hardness
max. HRBW
9595
*Tensile & hardness testing requirements for ASTM A240 309S & 310S.

Creep Properties

Temperature
°C
Endurable Strength
of 309S, MPa
Endurable Strength
of 310S, MPa
538203220
593165172
649131124
7048289
7605555
8162741
8712027
*Endurable strength of ASTM A240 Type 309S & 310S at elevated temperatures for 1000 hours, extracted from technical literature of TISCO.

Temperature
°C
Creep Strength
for 309S, MPa
Creep Strength
for 310S, MPa
538113227
59386158
64969103
7044169
8162020
*Creep strength of ASTM A240 Type 309S & 310S at elevated temperatures for 10000 hours with 1% creep strain, courtesy of TISCO.

Sizes, Dimensions & Manufacturers

ASTM A240 310S plates

ASTM A240 310S plates supplied to Warsaw, Poland.

We hold large amounts of Type 309S and Type 310S plates, sheets & strips of ASTM A240 in stock. They are procured from prominent manufacturers in China: TISCO, Baowu Steel, JISCO, Tsingshan, and HBIS. Specifications: 1200~3000 mm in width, 0.6~80 mm in thickness, 3000~12000 mm in length.

International Equivalent

Nation/StandardDesignationDesignation
US/ASTM A240UNS S30908
Type 309S
UNS S31008
Type 310S
China/GB06Cr23Ni13 (new)
0Cr23Ni13 (old)
06Cr25Ni20 (new)
0Cr25Ni20 (old)
Japan/JISSUS309SSUS310S
EN/DIN1.4950
X6CrNi23-13
1.4951
X6CrNi25-20
*International equivalent alloy grades for ASTM A240 309S and 310S.

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