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ASME SA213 / ASTM A213 TP347H Stainless Steel Seamless Tube Heat Exchanger Tube

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ASME SA213 / ASTM A213 TP347H Stainless Steel Seamless Tube Heat Exchanger Tube

Country/Region	china
City & Province	ningbo zhejiang

Product Details

ASTM A213 / ASME SA213 TP347H Stainless Steel Seamless Tube Heat Exchanger Tube

Compared to other grades of steel, 347H has certain advantages:

1. High temperature resistance: Steel 347H exhibits excellent heat resistance, making it suitable for applications where materials are subjected to elevated temperatures.

2. Enhanced corrosion resistance: This grade contains a higher level of chromium and columbium (niobium) than standard austenitic stainless steels. As a result, 347H offers improved resistance to corrosion, especially in environments with high concentrations of acids, such as sulfuric, acetic, and phosphoric acids.

3. Weldability: Steel 347H is known for its good weldability. It can be easily welded using standard welding techniques, such as TIG (Tungsten Inert Gas) or MIG (Metal Inert Gas) welding, without experiencing significant issues like sensitization or cracking.

4. Stability against intergranular corrosion: One of the primary advantages of 347H is its ability to resist intergranular corrosion, which can occur in certain environments or after exposure to high temperatures. This stability is due to the addition of columbium, which forms carbides that inhibit the precipitation of chromium carbides, thus preventing sensitization and intergranular corrosion.

5. Versatility: Steel 347H finds utility in a wide range of applications, including chemical processing, oil and gas industry, pharmaceuticals, food processing, and high-temperature environments like furnace equipment and heat exchangers.

Equivalent Grades of Stainless Steel 347/347H Seamless Tube

Stainless Steel	Tradename	UNS no.	Werkstoff No.
347H	347H Stainless	S34709	1.4961

ASME SA213 / ASTM A213 TP347H Stainless Steel Seamless Tube Chemical Composition

max.

Other

0.04-0.10

2.00

0.045

0.03

0.75

9.0-13.0

17.0-19.0

...

8×C-1.10

...

ASME SA213 / ASTM A213 TP347H Stainless Steel Seamless Tube Physical Propertie

In the Annealed Condition at -20°F to +100°F
Alloy	UNS Design	Density kg/dm³	Modulus of Elasticity (x106 psi)	Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6)	Thermal Conductivity (BTU-in/ft2-h-°F)

347H	S34709	7.98	29	9.2	—

ASME SA213 / ASTM A213 TP347H Stainless Steel Seamless Tube Mechanical Properties

In the Annealed Condition at -20°F to +100°F
			Tensile Strength	Tensile Strength	Yield Strength	Yield Strength
Alloy	UNS	Spec	MPa	ksi	MPa	ksi	Elongation in 2 inches (min.) %	Grain Size Req.	Harndess HBW
347H	S34709	ASME SA 213	515	75	205	30	35	7 or coarser	192