Stainless 347

Stainless 347 – UNS S34700

General

347 and 347H (UNS S34709, which guarantees Carbon content at min 0.07%) are versions of the more common 304, containing stabilising elements, in this Niobium and Tantalum.  These grades are used at temperatures in the carbide precipitation range, 45-900°C, and subsequently exposed to corrosive environments.  Used in High temperature gaskets and expansion joints, rocket engine parts, aircraft collector rings and exhaust manifolds and chemical production equipment.

Chemical Composition

C

Mn

Ni

Si

Cr

S

P

Fe

 

 

 

Min %

–

–

9.00

–

17.00

–

–

Bal.

 

 

 

Max %

0.08

2.00

13.00

0.75

19.00

0.03

0.045

–

 

 

 

Other Elements

 Nb + Ta 1.00% Max.

 

Mechanical Properties

MPA

%

Tensile Strength.

515 min.

 

Yield Strength (0.2% offset)

205 min.

 

Elongation in 2” (50mm) or 4D

 

40

Reduction of Area, min

 

 

 

 

Hardness

201 HB max

 

 

Alternative Designations

AISI 347    AMS 5512    AMS 5556    AMS 5558    AMS 5571    AMS 5575    AMS 5646    AMS 5654    AMS 5674    ASTM A167    ASTM A182    ASTM A193 (347, B8CA)    ASTM A194 (347, B8CA)    ASTM A213    ASTM A240    ASTM A249    ASTM A269    ASTM A271    ASTM A276    ASTM A312    ASTM A314    ASTM A320 (347, B8CA)    ASTM A336    ASTM A358    ASTM A376    ASTM A403    ASTM A409    ASTM A430    ASTM A473    ASTM A479    ASTM A511    ASTM A554    ASTM A580    ASTM A632    ASTM A774    ASTM A778    ASTM A813    ASTM A814    DIN 1.4550    MIL A-23196    MIL S-23195    MIL S-23196    MIL T-6737    QQ S763    QQ S766    UNS S34700

The data contained in this publication is for informational purposes only and may be revised at any time without prior notice. The data is believed to be accurate and reliable, but Hague Fasteners Limited makes no representation or warranty of any kind (express or implied) and assumes no liability with respect to the accuracy or completeness of the information contained herein. Although the data is believed to be representative of the product, the actual characteristics or performance of the product may vary from what is shown in this publication. Nothing contained in this publication should be construed as guaranteeing the product for a particular use or application.