347/347H,1.4550,1.4961

 347/347H,UNS S34700, S34709,1.4550,1.4961

Stainless Steel 347 UNS S34700 is advantageous for high temperature service because of its good mechanical properties . SS 347 also has excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800° to 1500° F. SS 347 is similar to SS 321 with respect to intergranular corrosion which is achieved through the use of columbium as a stabilizing element to maximize this feature. SS 347 can not be hardened through heat treating, but elevated properties may be obtained through cold reduction. SS 347H is a modification of SS 347 with a higher carbon content, to provide improved high temperature strength.

Composition of 347/347H tubing and pipe

Grade

347

347H

UNS Designation

S34700

S34709

Carbon (C) Max.

0.08

0.04–0.10

Manganese (Mn) Max.

2.00

2.00

Phosphorous (P) Max.

0.04

0.04

Sulphur (S) Max.

0.03

0.03

Silicon (Si) Max.

0.75

0.75

Chromium (Cr)

17.0–20.0

17.0–20.0

Nickel (Ni)

9.0–13.0

9.0–13.0

Molybdenum (Mo)

Nitrogen (N)

Iron (Fe)

Bal.

Bal.

Other Elements

Cb+Ta=10xC-1.0

Cb+Ta=8xC-1.0

Specifications

Stainless Steel SS 347 / 347H

AISI

347 / 347H

UNS

S34700 / S34709

Werkstoff Nr.

1.4550 / 1.4961

Mechanical & Physical Properties

Density

8.0 g/cm3

Melting Point

1454 °C (2650 °F)

Tensile Strength

Psi – 75000 , MPa – 515

Yield Strength (0.2%Offset)

Psi – 30000 , MPa – 205

Elongation

35 %

 

We have products:

seamless pipe,seamless tube,

 welded pipe,welded tube,

pipe fitting,flange


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