Super-ferritic stainless steel Grade 439MTechnical advantages:
Advantages on equipment: After continuously revamping and upgrade, TISCO is well equipped with specialized and the most advanced production line of super ferritic stainless steel in the world.Application of Super Ferritic Stainless Steel IndustryThe industry of automobile exhausting system: We have established long term cooperation with end users and service centers which work at automobile exhausting tubes and pressed parts.Conventional Products
Steel grade Grade Specifications
Thickness Width mm Weight MT Standard Application
400 series SUS436L TTS441 TTS429 439M 2B/2D Surface: 0.3-3.0mmBA surface: 0.2-1.5mm 2B/2D Surface:
1000-1280
1000-2000BA surface: 1000-1500 6-15MT Q/T 128-2011
ASTM/ASME
JISG4305
EN10088
BSEN10028-7 Apply to exhaust pipe
Chemical Composition
Grade Mass Percentage (%) MAX
C Si Mn P S Cr N Mo Others
439 0.030 1.00 1.00 0.040 0.015 17.5-18.5 0.030 - Nb+Ti:4C-0.75
Physical properties
Grade Density (g/cm3) Elastic modulus GPa Linear expansion coefficient 10-6/K20-100C Themnal conductivity W/m K 100C J/Kg k Specific heat 20C Resistance rate (UM cm) Magnetism
439 7.70 200 10.4 23.1 460 60 QualifiedMechanical Properties
Mechanical properties at ambient temperature
Grade Yield strength RP0.2(MPa) Tensile strength Rm(MPa) Elongation A(%) Hardness HRS Hardness HV Bending test
439 ≥205 ≥415 ≥22 ≤88 ≤183 QualifiedWelding Properties and Notice:
Low carbon and Nitrigon, Titanium and Niobium added, high corrosion-resisted performance on welding parts.
Difficult for Fusion wedding and etter for filler wire welding.
Low thermal expansion coefficient-high heat conduction and small deformation after welding comparing with 304.
Try to avoid heat imputing, otherwise result in bigger crystalline grain and influent the toughness of the plate.
Gas protection: Argon protection is needed to avoid surface oxidization and nitrizing.
To Avoid the contanmination of grease, otherwise carburization will occur.
Better to use 309L or higher grade welding rod.Research and Development Target400 series will be our research and developing target in future. Supper ferritic stainless steel will be hightlight, and as the substitute of 304 for our aim on the direction of economic research and developing. Realize 439 and 443 product seriation, enlarge the application of decorationg industry such ad the decoration of outside roof and curtain wall. Develop the high-chromium ferritic stainless steel such as 445, 446M and so on to improve the application of 400 series.Service Promise
To provide consumers with the personalized designs on composition, propertiesproperty, packing, coil weight and quality certificate.
Technical support to customers in material selection fabrication.
Accurate and prompt delivery
Response to customer's claim within 24 hours.
Advantages on equipment: After continuously revamping and upgrade, TISCO is well equipped with specialized and the most advanced production line of super ferritic stainless steel in the world.Application of Super Ferritic Stainless Steel IndustryThe industry of automobile exhausting system: We have established long term cooperation with end users and service centers which work at automobile exhausting tubes and pressed parts.Conventional Products
Steel grade Grade Specifications
Thickness Width mm Weight MT Standard Application
400 series SUS436L TTS441 TTS429 439M 2B/2D Surface: 0.3-3.0mmBA surface: 0.2-1.5mm 2B/2D Surface:
1000-1280
1000-2000BA surface: 1000-1500 6-15MT Q/T 128-2011
ASTM/ASME
JISG4305
EN10088
BSEN10028-7 Apply to exhaust pipe
Chemical Composition
Grade Mass Percentage (%) MAX
C Si Mn P S Cr N Mo Others
439 0.030 1.00 1.00 0.040 0.015 17.5-18.5 0.030 - Nb+Ti:4C-0.75
Physical properties
Grade Density (g/cm3) Elastic modulus GPa Linear expansion coefficient 10-6/K20-100C Themnal conductivity W/m K 100C J/Kg k Specific heat 20C Resistance rate (UM cm) Magnetism
439 7.70 200 10.4 23.1 460 60 QualifiedMechanical Properties
Mechanical properties at ambient temperature
Grade Yield strength RP0.2(MPa) Tensile strength Rm(MPa) Elongation A(%) Hardness HRS Hardness HV Bending test
439 ≥205 ≥415 ≥22 ≤88 ≤183 QualifiedWelding Properties and Notice:
Low carbon and Nitrigon, Titanium and Niobium added, high corrosion-resisted performance on welding parts.
Difficult for Fusion wedding and etter for filler wire welding.
Low thermal expansion coefficient-high heat conduction and small deformation after welding comparing with 304.
Try to avoid heat imputing, otherwise result in bigger crystalline grain and influent the toughness of the plate.
Gas protection: Argon protection is needed to avoid surface oxidization and nitrizing.
To Avoid the contanmination of grease, otherwise carburization will occur.
Better to use 309L or higher grade welding rod.Research and Development Target400 series will be our research and developing target in future. Supper ferritic stainless steel will be hightlight, and as the substitute of 304 for our aim on the direction of economic research and developing. Realize 439 and 443 product seriation, enlarge the application of decorationg industry such ad the decoration of outside roof and curtain wall. Develop the high-chromium ferritic stainless steel such as 445, 446M and so on to improve the application of 400 series.Service Promise
To provide consumers with the personalized designs on composition, propertiesproperty, packing, coil weight and quality certificate.
Technical support to customers in material selection fabrication.
Accurate and prompt delivery
Response to customer's claim within 24 hours.