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Stainless Steel 347H

Material: Grade 347H, UNS S34709, 1.4961
Type: Pipes
          Plates
          Bars
          Fittings
          Forgings
          Flanges
          Prefabrication
Availability:
Stainless Steel 347H Features:

This columbium bearing steel not sensitive to intergranular corrosion after heating within the range of carbide precipitation but elevated properties may be achieved through cold reduction.The “H” in 347H stands for “high carbon” content. 


This variety of stainless steel has higher amounts of carbon than standard 347 stainless steel, with increased tensile strength and creep resistance at elevated temperatures. Due to its higher carbon content, this type of stainless steel provides better stress rupture properties than the standard version. It also offers excellent resistance to oxidation in intermittent service up to 1600F and continuous service up to 1700 degrees F.


Stainless steel 347H Chemical Composition, %

Grade

C

Mn≤

P≤

S≤

Si≤

Cr

Ni

Fe

Nb

347H

0.04-0.10

2.0

0.045

0.03

0.75

17.0-19.0

9.0-13.0

62.38-73.64

8*C-1.0


Stainless steel 347H Mechanical Properties

Grade

Tensile, min, ksi[MPa]

Yield, min, ksi[MPa]

Elongation, %(min)

Hardness, HB(max)

347H

75【515】

30【205】

40

201


Stainless steel 347H Physical Properties

Density: 7.98 g/cm3



Stainless steel 347H Equivalent Grades

STANDARD

WERKSTOFF NR.

UNS

JIS

EN

347H

1.4961

S34709

SUS347H

X6CrNiNb18-12


Stainless steel 347H ASTM Specification

Pipe,
SMLS& Welded

Tube,
SMLS& Welded

Pipe ,
Seamless

Sheet/Plate

Bar /Rod

Forging /Flange

BW Fittings

ASTM A312

ASTM A269/ASTM 249

ASTM A213

ASTM A240

ASTM A276/A479

ASTM A182

ASTM A403


Stainless steel 347H Application

  • High temperature gaskets

  • Rocket engine parts

  • Aircraft collector rings

  • Exhaust manifolds

  • Chemical production equipment

  • Pollution control equipment


JN Alloy Products


JN Alloy is a distributor and product manufacturer of stainless steel, duplex steel, and nickel.
Tel: +86 19339900211
Add: Stainless steel Market 289, Xinwu District , Wuxi, China
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