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ASME SA268 Type 430Ti, 439 and 441 Ferritic Stainless Steel Tube Fully Annealed

Categories Automotive Stainless Steel Tubing
Brand Name: SPEZILLA
Model Number: SMLS
Certification: ISO9001, TS16949, PED, AD2000
Place of Origin: CHINA
MOQ: 500KGS
Price: NEGOCIATION
Payment Terms: T/T, L/C
Supply Ability: 100TONS/MONTH
Delivery Time: Ex-Mill 15 - 30DAYS
Packaging Details: WOODEN BOXED
Product Name: TP444 Ferritic Steel Alloy Tube
Specification: ASTM A268 ASME SA268
Material Grade: TP444
Test Certificate: EN10204 3.1
Size Range: 5/8"-2"
WT: BWG18-BWG12
Length: 6096mm
Finishing Options: Pickling, Polishing, Custom Cutting
Packaging: Wooden Box, Bundled, Export Packaging Available
Application: Boiler,Heat Exchanger
Shape: Round
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ASME SA268 Type 430Ti, 439 and 441 Ferritic Stainless Steel Tube Fully Annealed

ASME SA268 Type 430Ti, 439 and 441 Ferritic Stainless Steel Tube Fully Annealed

Type 430Ti, 439 and 441) Ferritic Stainless Steel

Having better weldability and formability characteristics than Group 2 ferritic sheets of steel, Group 3 steel can be used to replace austenitic type 304 austenitic in a wider range of applications, including in sinks, exchange tubes, exhaust systems and welded parts of washing machines.


Type 441 Stainless Steel is a ferritic stainless steel which provides good high-temperature strength (exceeding that of Types 409 and 439 Stainless Steels) plus good corrosion resistance in many exhaust gas environments (equivalent to Type 439 and 18 Cr-Cb Stainless Steels). . Ferritic steels are not inherently strong at elevated temperatures, but columbium additions coupled with appropriate solution annealing markedly improve long-time creep rupture strength. Type 441 is dual stabilized with niobium and titanium to provide good weld ductility and resistance to intergranular corrosion in the weld heat affected zone.


TP430 is a typical martensitic chromium-alloy steel grade. It does not have the nickel content and owns the following characteristic:

- Harding by heat treatment
- High hardness with good ductility
- Good corrosion resistance capability
- Good wear corrosion resistance
- High cold-deformation property

Typical applications for 430 grade include:

  • Linings for dish washers
  • Refrigerator cabinet panels
  • Automotive trim
  • Lashing Wire
  • Element Supports
  • Stove trim rings
  • Fasteners
  • Chimney Liners

Heat Treatment

  • Solution Annealing – Heat to 815-845°C, hold for ½ hour per 25mm of thickness, slow furnace cool to 600°C and then quickly air cool. Slow cooling from 540-400°C will cause embrittlement.
  • Sub-Critical anneal – Heat to 760-815°C and then air cool or water quench.
  • This grade is not hardenable by thermal treatment.

Welding

  • Pre-heat at 150-200°C if welding is necessary.
  • Embrittlement in the weld metal and heat affected zone can be relieved by a post-weld anneal at 790-815°C
  • Grain refinement will not occur.

Machining

  • Easier to machine than the standard austenitic grades such as 304.
  • Still a tendency for galling and pick-up on the cutting tool.
  • Bars that have been lightly drawn are easier to machine than those in the annealed condition.
  • Grade 430F, the free machining version of 430, is very much easier to machine.

Fabrication

  • Lower work hardening rate makes bending and forming somewhat easier than for grade 304
  • Lower ductility restricts very severe operations.
  • Severe bends should be made with the bend axis at right angles to the rolling direction.
  • Severe cold heading of 430 wire is possible.

Item Code:TP430
Tube OD.:1/4'' - 2''
Wall:0.028'' - 0.120''
Length:20FT
Material:430 441
Standard:ASTM A268 ASME SA268
Finish:Annealed & Pickled.
Type:Seamless Cold Drawn
Certification:ISO9001:2015
Mill Test Certificate:EN10204 3.1
Packing:

Sleeved, Wooden Boxed


5% Test
Solution at 120°F
(49°C)
Corrosion Rate in Mils per Year and Millimeters per Year (mm/a)
Alloy 409Alloy 410SAlloy 420Alloy 425 ModAlloy 440AAlloy 430
Acetic Acid0.88
(0.022)
0.079
(0.002)
1.11
(0.028)
4.79
(0.122)
2.31
(0.0586)
0.025
(0.0006)
Phosphoric Acid0.59
(0.002)
0.062
(0.002)
0.068
(0.002)
0.593
(0.015)
0.350
(0.009)
0.029
(0.001)

ASTM A268 Tp410 tube composition:

Grade:TP405TP410TP249TP430TP443TP446-1TP446-2TP409
UNSS40500S41000S42900S43000S44300S44600S44600S40800S40900
C, max0.080.150.120.120.200.200.120.080.08
Mn,max1.001.001.001.001.001.501.501.001.00
P, max0.040.040.040.040.040.040.040.0450.045
S, max0.030.030.030.030.030.030.030.0450.045
Si, max1.001.001.001.001.001.001.001.001.00
Ni0.50max0.75max0.75max0.50max0.80max0.50max
Cr11.5-14.511.5-13.514.0-16.016.0-18.018.0-23.023.0-27.023.0-27.011.5-13.010.5-11.7
Mo
Al0.10-0.30
Cu0.90-1.25
N0.250.2512xCmin6xCmin
Ti1.10max0.75max

Chemical Composition
Min. %Max %
Carbon0.090.15
Silicon01.00
Manganese01.00
*Nickel01.00
Chromium11.5013.50
Phosphorous00.04
Sulphur00.03
*Nickel additional option

Quality ASME SA268 Type 430Ti, 439 and 441 Ferritic Stainless Steel Tube Fully Annealed for sale
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