DESCRIPTION

Type 309 is an austenitic chromium nickel stainless steel (.08% max carbon). Type 309 is employed for parts requiring both corrosion and heat resistance and oxidation resistance up to 2000 °F. Strength at elevated temperatures is similar to that of 18-8 Stainless Steels. This alloy posses excellent resistance to oxidation as well as high tensile and creep strengths at elevated temperatures. It is more resistant to marine atmospheres than Type 304. It is generally considered as a heat-resisting alloy.

CHEMISTRY TYPICAL Carbon: 0.08 max Manganese: 2.00 max Silicon: 1.00 max Chromium: 22.00- 24.00 Nickel: 12.00- 15.00 Molybdenum: 0.75 max Phosphorus: 0.040 max Sulphur: 0.030 max Copper: 0.75 max Iron: Balance PHYSICAL PROPERTIES Density: 0.289 lbs/in3 9.01 g/cm3 Electrical Resistivity: microhm-in (microhm-cm): 68 °F  (20 °C): 30.7 (78.0) Specific Heat: BTU/lb/°F (kJ/kg•K): 32 - 212 °F (0 - 100 °C): 0.12 (0.50) Thermal Conductivity: BTU/hr/ft2/ft/° F, (W/m•K) At 212 ° F (100 °C)-9.0 (15.6) At 932 ° F (500 °C)-10.8 (18.7) Mean Coefficient of Thermal Expansion: in/in/°F (µm/m•K) 32 -212 °F (0 -100 °C)-8.3 x 10-6 (14.9) 32 -600 °F (0-315 °C)-9.3 x 10-6 (16.7) 32-1000 °F (0-538 °C)-9.6 x 10-6 (17.3) 32 -1200 °F (0 -649 °C)-10.0 x 10-6 (18.0) Modulus of Elasticity: ksi (MPa) 29 x 103 (200 x 103) in tension 11.2 x 103 (78 x 103) in torsion Magnetic Permeability, H = 200 Oersteds: Annealed < 1.02 max. Melting Range: 2550 - 2590° F (1399 - 1454°C)

APPLICATIONS
Furnace parts, Heat Exchangers, Paper Mills

Q&A

Q:Are you trading company or manufacturer ?
A:We are professional manufacturer for stainless steel  and our company also is a very professional and    technical foreign trade company for stainless steel products.We have more export experience with competitive price and best after-sales service Apart from this we can provide a wide range of steel products to meet the requirement of customer
Q:Will you delivery the goods on time?
A:Yes,we promise to provide best quality products and delivery on time no matter if the price change lot or not.Honesty is our tenet.
Q:Do you provide samples ? Is it free or extra ?
A: The sample could can provide for customer with free,but the freight will be covered by customer account .The sample freight will be returned to customer account after we cooperate.
Q:Do you have any certifications?
A:Yes,that is what we guarantee to our clients. we have ISO9000,ISO9001 certificate,API5L PSL-1 CE certificates etc. Our products are of high quality and we have professional engineers and development team.
Q:What is your terms of payment ?
A:Payment<=1000USD,100% in advance. Payment>=1000USD,30% T/T in advance,balance before shipment or paid against copy of B/L within 5 working days.100% Irrevocable L/C at sight is favorable payment term as well
Q:Do you accept the third party inspection?
A:Yes absolutely we accept