Types 309 Stainless Steel and 309S are austenitic chromium-nickel stainless steels that provide excellent corrosion resistance and heat resistance plus good strength at room and elevated temperatures.
Description：
Types 309 Stainless Steel and 309S are austenitic chromium-nickel stainless steels that provide excellent corrosion resistance and heat resistance plus good strength at room and elevated temperatures.
ASTM A167 (309), ASTM A240 (309S)
furnace parts, heating elements, aircraft and jet engine parts, heat exchangers, sulfite liquor handling equipment, kiln liners, boiler baffles, refinery and chemical processing equipment, and auto exhaust parts
Types 309 Stainless Steel and 309S are austenitic chromium-nickel stainless steels that provide excellent corrosion resistance and heat resistance plus good strength at room and elevated temperatures.
|
Element |
Type 309 |
Type 309S |
|
Carbon |
0.20 max. |
0.08 max. |
|
Manganese |
2.00 max. |
2.00 max. |
|
Sulfur |
0.030 max. |
0.030 max. |
|
Phosphorus |
0.045 max. |
0.045 max. |
|
Silicon |
0.75 max. |
1.0 max. |
|
Chromium |
22.0 – 24.0 |
22.0 – 24.0 |
|
Nickel |
12.0 – 15.0 |
12.0 – 15.0 |
|
Type |
Yield Strength 0.2% offset (KSI) |
Tensile Strength (KSI) |
% Elongation (2" Gauge length) |
Hardness Rockwell |
|
309 |
30 min. |
75 min. |
40 min. |
HRB 95 max. |
|
309S |
30 min. |
75 min. |
40 min. |
HRB 95 max. |
|
Density (lb./ in^2) @ RT |
|
0.29 |
|
Modulus of Elasticity in Tension (psi x 10^6) |
|
29.0 |
|
Specific Heat (BTU/°F/lb.) |
32 to 212 °F |
0.12 |
|
Thermal Conductivity (BTU/hr/ft^2/ft) |
212°F |
9.0 |
|
|
932°F |
10.8 |
|
Mean Coefficient of Thermal Expansion (in. x 10^-6 per °F) |
32 to 212°F |
8.3 |
|
|
32 to 600°F |
9.3 |
|
|
32 to 1,000°F |
9.6 |
|
|
32 to 1,200°F |
10.0 |
|
Electrical Resistivity (micro ohms - cm) |
at 70°F |
39.8 |
|
Melting Point Range (°F) |
|
2550 - 2650 |
|
Oxidation Resistance - Continuous Service(°F) |
|
2000 |
|
Oxidation Resistance - Intermittent Service(°F) |
|
1800 |
These alloys are not hardenable by heat treatment. Anneal at 1900 - 2050°F (1038 - 1121°C), then water quench or rapidly air cool.
Types 309 and 309S Stainless Steels can be roll formed, stamped and drawn readily. In-process annealing is usually required to reduce hardness and increase ductility.
Type 309 is generally considered to have weldability nearly equivalent to the most common alloys of this class, Types 304 and 304L. When a weld filler is needed, AWS E/ER 309 and 310 are most often specified.
Types 309 and 309S provide excellent general corrosion resistance. They are more resistant to marine atmospheres than Type 304. They exhibit high resistance to sulfite liquors and are useful for handling nitric acid, nitric-sulfuric acid mixtures, and acetic, citric, and lactic acids.
WUXI LIANDE METAL PRODUCTS CO.,LTD
Add : 168-1532,Wangzhuang Road,Xinwu District,Wuxi,Jiangsu,China
Tel : +86-13338755576
WeChat : 8613338755576
sales manger：Charles
E-mail : charles@liandemetal.com
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