439 Stainless Steel Sheet/Plate

Grade: 201/304/316L/310S/ 2205 and so on
Surface:  No.4
Standard: ASTM A240
Thickness: 0.076mm-28mm

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439 Stainless Steel Sheet/Plate

439 stainless steel sheet is based on the ordinary ferrite material (430) on the basis of lowering the C content, while adding Ti and other stabilizing elements, so that the steel’s resistance to intergranular corrosion, moldability and weldability have improved.

Compared with the 304 stainless steel items, its elongation is low (about 30%), but the strength, corrosion resistance and corrosion resistance is better than 200 series materials.



  • Elevator and escalator decoration board
  • Building decorative boards, such as decorative structural parts and structural pipes.
  • Automotive exhaust system components
  • Washer inner cylinder



Type 439 provides good formability. Olsen Cup heights of 0.490″ are obtainable, flat bends of 180° are possible with material up to 0.080″ thick. The Limiting Draw Ratio (LDR) for this alloy is 2.13.


Type 439 is generally considered to be weldable by the common fusion and resistance techniques. It has weldability comparable to Type 409 stainless steel.

Chemical Composition
(Maximum, unless range is indicated)

C Cr Ni Mn Si N P S Al Ti
0.030 17.0-19.0 0.50 1.00 1.00 0.030 0.040 0.030 0.15 0.20 +4(C+N) min
1.10 max

Mechanical Properties

Property Yield Strength, min. (ksi) Tensile Strength, min. (ksi) Elongation, min. (%) Hardness, max. (Rb)
439 30 60 22 89

Physical Properties

Property Density, lb/in3 Modulus of Elasticity, psi Coefficient of Thermal Expansion, 68-212˚F, /˚F Thermal Conductivity, Btu/ft hr ˚F Specific Heat, Btu/lb ˚F Electrical Resistivity, Microohm-in
439 0.278 29.0 x 106 5.6 x 10-6 14.0 0.11 24.8


Value-added Service

Every industry has its unique set of stainless steel coil specifications and needs. We offer many Value Added Services to meet your needs from cut-to-length to hard-to-find materials and special requirements. With over 13 years in the business, our team is professional at finding out solutions to fit your needs.


Let Qukin Corporation Be Your Partner!

Stainless Steel Coil/Sheet Beveling We can cut and bevel the edges of stainless steel coil/sheet to prepare forwelding or other processing.
Stainless SteelCoil/Sheet Grinding We can provide grinding service of stainless steel steel coil/sheetin order to satisfy customers’ flatness requests.
Stainless SteelCoil/Sheet Polishing Our stainless steel steel coil/sheetcan be polished to a #4 polish, #6 polish,#7polish, or a #8 mirror finish. It can also be polished on one side or two sides.
Stainless SteelCoil/Sheet Perforating Our perforated stainless steel steel coil/sheetcomes in a selection of holeshapes, pattern sizes, gauges and grades. It has endless applications such asenclosures,partitions, sign panels, guards, screens, and more.
Stainless SteelCoil/Sheet Laser Cutting Our technologically advanced laser machines provide us with an efficient, high speed and cost effective form of profiling steel coil/sheetwhich ensures a superior clean cut and oxide free finish.
Stainless SteelCoil/Sheet Water Jet Cutting We offer stainless steel steel coil/sheetdynamic Waterjet cutting in order to process complex part geometry.
Stainless SteelCoil/Sheet Embossing Our stainless steel embossed patterns including basket embossed pattern,diamond pattern or square pattern.
Stainless Steel Coil/Sheetdecorating We offer various decorative stainless steel steel coil/sheet, such as stainless steel mirror steel coil/sheet, stainless steel hairline steel coil/sheet,color coated stainless steel coil/sheet, etched stainless steel steel coil/sheet, vibration finish stainless steel steel coil/sheet, bead blast finish stainless steel steel coil/sheet, stain brush finish stainless steel steel coil/sheet, and more.
Stainless SteelCoil/Sheet Heatreating & Annealing We can heatreat 410 and 17-4PH stainless steel plate to change mechanical properties. In some cases, secondary annealing 300 series might be required depending on the application.


Our stainless steel products are packed and labeled according to the regulations and customers requests.