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Home > products > Seamless Stainless Steel Tubing > AISI 439 Stainless Steel Seamless Round Tubes Cold Rolled SS 2" Sch Xxs

AISI 439 Stainless Steel Seamless Round Tubes Cold Rolled SS 2" Sch Xxs

Product Details

Place of Origin: Wenzhou,China

Brand Name: Zheheng

Certification: ISO9001

Model Number: 439

Document: Product Brochure PDF

Payment & Shipping Terms

Minimum Order Quantity: MOQ500kg

Packaging Details: In wooded cases or pallets,or as for clients requirement

Delivery Time: 7-15 working days after receiving payment

Payment Terms: L/C, D/P, T/T, Western Union

Supply Ability: 1000 Ton/Tons per Month

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Highlight:

AISI 439 Stainless Steel Tubing

,

Cold Rolled SS Seamless Tube

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Seamless Round Tubes 12m

Port:
Ningbo
OD:
Φ6--630mm
Section Shape:
Round
Package:
Seaworthy Standard Package
Price Terms:
FOB,CIF,CFR,EXW
Length:
1-12m
Technique:
Hot Rolled/Cold Rolled
Wall Thickness:
1-40mm
Series:
400 Series
Port:
Ningbo
OD:
Φ6--630mm
Section Shape:
Round
Package:
Seaworthy Standard Package
Price Terms:
FOB,CIF,CFR,EXW
Length:
1-12m
Technique:
Hot Rolled/Cold Rolled
Wall Thickness:
1-40mm
Series:
400 Series
AISI 439 Stainless Steel Seamless Round Tubes Cold Rolled SS 2" Sch Xxs

Overview


439 steel is based on the ordinary ferritic material (430) to reduce the content of Carton, while adding Ti and other stabilizing elements, so that the steel resistance to intergranular corrosion, formability and weldability have been improved. Compared with 304 steel, although the elongation is low (about 30%), the strength and corrosion resistance are comparable, and the corrosion resistance is better than that of 200 series materials. 439 stainless steel is a stable ferritic stainless steel (chromium content 17.0 min, max 19.0 max). Its chromium (Cr) content is higher than that of 409 stainless steel, thus improving corrosion resistance. 439 stainless steel is stabilized by the addition of titanium (Ti), thus having good weldability. The alloy resists intergranular corrosion and stress corrosion cracking. Compared to SUS304, it has higher thermal conductivity and lower coefficient of expansion. Commonly used in automotive exhaust components, heat exchanger piping, kitchen equipment, household appliances and building structure applications.

 

Application


Elevator, escalator decorative board architectural decorative board, such as decorative structural parts, structural tubes, automotive exhaust system components, washing machine inner cylinder.

 

Equivalent Standards


AISI DIN UNS
439 1.451 S43036

 

439 Stainless Pipe Chemical Composition


Carbon 0.030 max.
Manganese 1.00 max.
Sulfur 0.030 max.
Phosphorus 0.040 max.
Silicon 1.00 max.
Chromium 17.0 – 19.0
Nickel 0.50 max.
Nitrogen 0.030 max.
Aluminum 0.15 max.
Titanium [0.20+4x(C+N)] min. – 0.75 max.

 

 

Physical Properties


Melting Point 2741°F (1505°C)
Density 0.278 lbs/in3 / 7.70 g/cm3
Modulus of Elasticity in Tension 28 X 106 psi / 193 GPa

 

Mechanical Properties


Tensile Strength Minimum (psi) 66,000 - 70,000
Yield Strength Minimum 0.2% offset (psi) 43,000 - 48,000
% Elongation in 2” Minimum 32 - 36%
Hardness Rockwell B74 - 78

 

Heat Treatments: Type 439 is not hardenable by heat treatment


Annealing:Heat slowly to 1450 -1600°F (790 - 871°C), quickly cool. Slow cooling produces less desirable impact transition behavior. Ferritic stainless steels containing more than about 12% chromium have a susceptibility to a phenomenon known as 885°F (475°C) embrittlement. This embrittlement is observed as a degradation of impact properties at room temperature resulting from very long exposures in the temperature range of 700 to 1000°F (371 to 537°C). If service temperatures are cycling through this range, exposure above, about 1050°F (565°C), restores the room temperature toughness properties. When there have been long dwell times near 885°F (475°C), service temperatures that cycle above, about 1050°F (565°C), are beneficial rather than detrimental.

 

Corrosion Resistance


AISI Type 439 is resistant to attack by potable water and many mildly or moderately corrosive chemical environments which are oxidizing in nature. In various chloride solutions, studies have shown pitting resistance of Type 439 to be superior to that of Type 304. In addition, Type 439 is not subject to stress corrosion cracking which may cause premature failure of austenitic steels in chloride bearing environments such as hot waters used in heat exchangers.

 

 

Package Process


1.with plastic cap to protect both ends

2.weaving bag wrapped outside the pipe

3.then pack into wooden case.

 

Image


AISI 439 Stainless Steel Seamless Round Tubes Cold Rolled SS 2" Sch Xxs 0

 

Company introduction


 

AISI 439 Stainless Steel Seamless Round Tubes Cold Rolled SS 2" Sch Xxs 1