GLOBAL INDUSTRIAL PIPING SOLUTION

Materials

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SS 347 / 347H

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 347can 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.

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 %

Chemical Composition

  SS 347 SS 347H
Ni 9-13

9-13

Cr 17-19

17-19

C 0.08 max

0.04-0.10

Mo 3-4

3-4

Fe Balance

Mn 2 max

2 max

Si 0.75 max

0.75 max

S 0.03 max

0.03 max

P 0.045 max

0.045 max

Co + Ta 10xC min
1.00 max

8xC min
1.00 max

Application

Chemical Industry
Fabrication Industry
Aerospace Industry