347/347H Stainless Steel

AMS5646

Type 347 is a non-heat treatable, austenitic, electric furnace processed grade of stainless steel very similar in composition to Type 321. The major difference between Type 321 and Type 347 is that rather than having an addition of titanium, Type 347 has columbium added to it. Tantalum occurs in nature in conjunction with columbium and therefore it may be said that both are additives to this alloy. Type 347 can withstand more severely elevated temperatures than Type 321, as the resulting columbium carbide is more stable and insoluble than the titanium carbide. The only drawback in the use of Type 347 as opposed to Type 321 is that it is not recommended for use in radioactive services as radioactive tantalum has a much longer half-life than columbium. It is non-magnetic in the annealed state.

Type 347 is mainly used where corrosion resistance and sustained operations at temperatures between 800° F. and 1600° F. is of the utmost importance. It is also a superior grade for use on heavy welded objects, which cannot be re-annealed.

Corrosion Resistance
Resistance to intergranular corrosion and carbide precipitation is excellent with this grade. Its general atmospheric corrosion resistance is good, being similar to that of Type 302.

Typical Applications

  • Manifolds
  • Furnaces
  • Blower Parts
  • Aircraft and Missile Engines
  • High Temperature Equipment

Cronidur® 30 Stainless Steel

Cronidur® 30, a stainless martensitic steel, has greater corrosion resistance then 440c, and is longer wearing. Applications include aviation, medical engineering, industrial applications, precision mechanics, and many more!

Cronidur® 30 is the ideal solution!

  • For tools and machine parts which need high toughness under static and dynamic stresses
  • For tools and machine parts which are in contact with very corrosive fluids or gases even under bad abrasive conditions
  • Compared to the commonly used tool steels 1.2316, 1.4112 and 1.4125 if higher corrosion resistance is requested
  • And/or if there are higher requirements concerning grindability and polishabilty to achieve better surface conditions

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OFFICES

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Hartsville, South Carolina 29550

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Las Vegas, Nevada 89115

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Willimantic, CT 06226

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860.455.2191 | phone
860.455.2109 | fax

Ohio

819 Mckay Ct Suite 203
Boardman, Oh 44512

Map & Driving Directions

877-313-1053 | toll free
330-272-0850 | phone

AERO METALS ALLIANCE

Aero Metals Alliance (AMA) provides Aluminium, Stainless Steel, Alloy Steel, Titanium, Nickel Alloys and supply chain management services to the world’s leading aerospace companies. We currently operate from fourteen Service Centres in five countries throughout the America, Europe and Asia

This enables us to aggregate demand across a single supply chain on behalf of the world’s leading OEMs whilst at the same time providing a truly responsive local service to meet the needs of individual sub-contractors anywhere in the world.

Each of our Service Centres are equipped with the latest technology to meet the specific needs of each of our customers.

OUR BUSINESSES

In the markets in which they operate, our businesses have established their own reputations
for industry experience, knowledge and expertise.

Gould Alloys
Progressive Alloy Steels Unlimited
Service Centers Aero
Sunshine Metals Inc.
Wilsons Metals
Aero Metals Alliance