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ASTM A268 TP405 / UNS S40500 Ferritic Stainless Steel Tube Boiler and Heat Exchanger Tube

ASTM A268 TP405 / UNS S40500 Ferritic Stainless Steel Tube Boiler and Heat Exchanger Tube

Merknaam: YUHONG
Modelnummer: ASTM A268 TP405 naadloos buisje van roestvrij staal
MOQ: 1000 KG
Verpakking: Ply-houten kist/ijzeren kist/bundel met plastic dop
Betalingsvoorwaarden: L/C, T/T
Detailinformatie
Plaats van herkomst:
China
Certificering:
ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Productnaam:
Roestvrijstalen buis
Standaard:
ASTM A268, ASME SA268
Materiaal:
TP405, UNS-S40500
O.D:
1/4“, 3/8“, 1/2“, 5/8“, 3/4“, 1“, 1.1/4“, enz.
Dikte:
BWG10-25
Lengte:
Enkele willekeurige, dubbele willekeurige en snijlengte
Einde:
Duidelijk uiteinde, afgeschuind uiteinde
Markeren:
ASTM A268 TP405 roestvrijstalen naadloze buis, helder gegloeide warmtewisselaarbuis
Productomschrijving

ASTM A268 TP405 / UNS S40500 Stainless Steel Seamless Tube Heat Exchanger Tube

 

 

ASTM A268 TP405 is a low‑cost, SCC‑resistant ferritic tube ideal for moderate‑temperature heat exchangers and boilers where austenitic grades fail due to chloride cracking. Its key limitation is embrittlement at 475°C and poor low‑temperature toughness. For welded tube, post‑weld annealing is mandatory to achieve acceptable ductility.

 

 

Advantages of Grade 405 ferritic stainless steel

  1. Excellent chloride stress corrosion cracking (SCC) resistance

  2. Lower cost

  3. Lower thermal expansion

  4. Higher thermal conductivity

  5. Magnetic

  6. Good oxidation resistance

  7. Resists polythionic acid SCC

  8. No sensitization

  9. Good weldability (with PWHT)

  10. Good resistance to hydrogen attack

  11. Lower allowable stress at moderate temperatures

 

 

Chemical Composition % of STM A268 TP405 Ferritic Stainless Steel Seamless Tube

Grade C Mn Si P S Cr Ni Mo Cu N

TP405

0.08 max 1.00 max 1.00 max 0.045 max 0.030 max 11.0-13.0 0.50 max 0.60 max 0.25 max 0.10 max

 

 

Mechanical Properties of ASTM A268 TP405 Ferritic Stainless Steel Seamless Tube

Grade Tensile Strength Yield Strength Elongation Hardness
TP405

480 - 620 MPa (70 - 90 ksi)

205 MPa (30 ksi)

20-25%(acc. thickness)

160-190 HB

 

 

When to Specify TP405 vs. Austenitic (TP304/316)

Condition Recommendation
Chloride SCC risk (e.g., seawater, brine, caustic) TP405 (or other ferritic)
High temperature > 600°C (1112°F) Austenitic (e.g., TP304H)
Cryogenic or sub‑zero service Austenitic (TP304) – ferritic becomes brittle
High pressure steam (> 500 psi, > 400°C) Austenitic (creep strength)
Cost‑sensitive, moderate corrosion, no SCC risk TP405
Welding without PWHT possible Austenitic (ferritic requires PWHT)

 

 

Application

  • Heat exchanger bundles in hydrotreaters, catalytic reformers, and amine service (where chloride SCC is a concern).

  • Boiler feedwater heaters (low temperature end).

  • Condensers using brackish or chlorinated cooling water.

  • Refinery overhead condensers (wet H₂S / chloride environment).

  • Automotive exhaust heat exchangers (EGR coolers).

 

 

ASTM A268 TP405 / UNS S40500 Ferritic Stainless Steel Tube Boiler and Heat Exchanger Tube 0
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Alle recensies

B
Berrada
Morocco Jan 30.2026
We're dealing with aggressive fluids on the tube side. So far, no pitting or issues.
M
Marek
Poland Sep 5.2025
Heat transfer has been consistent since day one. Our outlet temperatures are steady, and the exchanger is performing exactly as we expected.
G
Godfrey
Uganda Aug 20.2025
For power plant boilers, especially in industrial settings like ours, these tubes work. Good heat transfer, holding up well.