Specialty Metals

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Type 431 Martensitic Stainless Steel

431 SS has been used for fasteners and fittings, structural components exposed to marine atmosphere, and for highly stressed aircraft components.

MasterSource offers a complete line of type 431 Annealed stainless steel inventory as noted below.

Alloys SPECIFICATION
431 SS
AISI 431
T431 SS
UNS S43100
16 Chromium with Ni
AMS2303
AMS-5628 HI SHEAR #115 (CHEM ONLY)
AMS-S-18732
ASTM-A-276
DMS-1565 EXC. SONIC
MIL-S-18732
QQS-763 EXC HARDNESS & IZOD

INVENTORY FORMS

Round bar: 3/16" thru 6-1/2" DIA

*Additional sizes & grades available upon request.

Compliance: Metals distributed by and thru MasterSource Company Inc. are in compliance with Section 1502 of the Dodd-Frank Act pertaining to conflict minerals.

 

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Supplying aviation grade metals to the DoD and Aerospace industry.
Aerospace, Defense, Marine, Nuclear and Industrial Metals.
Exotic Metals & Hard to Find Metals.

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