347

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Austenitic stainless steel

Description

347 stainless steel is an austenitic chromium-nickel stainless steel that is stabilized with niobium (columbium) instead of titanium (as in 321).
This niobium addition prevents the formation of chromium carbides during welding or prolonged heating, giving 347 excellent resistance to intergranular corrosion, even after exposure to high temperatures (up to 870 °C / 1600 °F).
347 stainless steel can also be supplied to petrochemical standards including ASTM A193 B8C & ASTM A194 8C

347 stainless steel

Product Forms

LoneStar Manufacture

Studbolts

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Studding

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Hexagon Headed Bolting

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Nuts (hex, round, 12 point, specials)

Socket Headed Bolting

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Double Ended and Waisted Studs

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Washers

Associated OEM Parts

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Turned & milled machined components

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Precision engineered components

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Thread types

LoneStar Manufacture

Metric Coarse

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Metric Fine

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Imperial UNC

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Imperial 8UN

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Imperial UNF

✓

ACME

✓

347

Iron

Balance

Chromium

17-19%

Nickel

9-13%

Niobium

(Columbium): 10x (C + N), typically ≤ 1%

Carbon

≤ 0.08%

Manganese

≤ 2%

Silicon

≤ 1%

Phosphorus

≤ 0.045%

Sulfur

≤ 0.03%

Tensile Strength

515 MPa (75 ksi) min

Yield Strength 0.2% offset

205 MPa (30 ksi) min

Elongation

40%

Reduction of Area

–

Hardness

201 HB max

Designation

Grade

Stainless

347

ASTM

A193 B8C

ASTM

A194 8C

UNS

S34700

Werkstoff

1.4550

Typical applications

Heat exchangers & super heaters
Chemical & petro-chemical equipment
Pipes, flanges and fittings
Exhaust manifolds
Chemical & processing refinery equioment

Disclaimer

All information is for illustrutive purposes only. LoneStar Group accepts no responsibility for the accuracy of data contained within or the use of any of the data by other parties.Properties do vary with the size and condition of the material.

Contact our electroplating experts to discuss your requirements.

We look forward to collaborating with you.