Stainless Steel 347 (AMS 5512 / AMS 5646)

Technical Data Sheet

Alloy 347 is a chromium nickel stainless steel which has been modified by the addition of columbium and tantalum. The main advantage of this is an excellent resistance to intergranular corrosion which is common to other austenitic stainless steels following exposure to temperatures of 800° to 1500°F. Type 347 has about the same general corrosion resistance as Type 302.

Alloy 347 is generally used where corrosive conditions are severe, such as aircraft exhaust stacks, manifolds and ring collectors. Type 347 is also used for heavy welded assemblies which cannot be annealed after welding or where the operating conditions cause exposure within the temperature range between 800° to 1500°F.

Typical Mechanical Properties

Availability

Alloy 347 is available in Sheet, Plates, Bars (Flat, Hex, Round, Square), Forging Stock, Tube , Welding Wire. 347 Foil (Shim) is available in various thicknesses. View stock list for further information. Foil Stock List, Sheet Stock List, Plate Stock List. contact Sales for further availability.

Specifications

347 / 347H

AMS 5512 Sheet / strip / plate (steel, corrosion and heat resistant, sheet, strip and plate 18Cr 10.5Ni)

AMS 5556 Seamless/ welded tube

AMS 5558 Welded /thin wall tube

AMS 5571 Seamless tube

AMS 5575 Welded tube

AMS 5646 Bars / wire / forging

AMS 5654 Bars (aircraft quality)

AMS 5674 Wire

AMS 5680 Wire

QQ-S-763

MIL-T-6737

MIL-T-8606 Seamless tube

MIL-T-8606 Welded tube

MIL-T-8808 Seamless tube

MIL-T-8808 Welded tube

MIL-S-6721

ASTM A240 / ASME SA240

ASTM A167 / ASME SA167

ASTM A276 / ASME SA276

ASTM A314 / ASME SA314

ASTM A479 / ASME A479

BS 2S130

BS 2T66 Tube

BS T72 Tube

BS S527 Sheet

BS 970; 347S17

EN58F / EN58G

MSRR 6522

MSRR 6524

WS 1.4544

WS 1.4546

WS 1.4550

WS 1.5446*Tube

AFNOR Z6CNNb18-11

UNS S30347