347H Stainless Steel Round Bars

 

JN ALLOY supplies 347H Bars, 347H Rods,UNS S34709 Bars Rods, 1.4561 347 Solid Bars, ASTM A276 UNS S34709 Bars, ASTM A479 347H Stainless Steel Bars Supplier.

 

Key Benefits of 347H Stainless Steel Round Bars

 

In conditions, where the corrosion and heat resistance of Stainless Steel 347H Square Bars and other metals are exhausted, high performance alloys including Nickel become the designer's material of choice. Maintains structural integrity in continuous high-temperature environments up to 870°C (1598°F) and short-term peaks up to 1150°C (2102°F), making SS 347H bars ideal for services involving thermal cycling or prolonged heat exposure. Excellent resistance to intergranular corrosion in sensitized conditions, thanks to its niobium (Nb) stabilization, which prevents chromium carbide precipitation. It performs well in oxidizing acids, chloride environments, and stress-corrosion conditions. Stainless Steel 347H round bars offers robust tensile and yield strength, ensuring reliability under heavy mechanical loads and high-pressure applications. Suitable for applications where magnetic interference is a concern, as well as food and pharmaceutical industries requiring sterile conditions. It can be easily fabricated using standard welding techniques (e.g., TIG, MIG) and machining processes, with post-weld properties remaining stable without excessive carbide formation.

 

Jinie Technology (Jiangsu) Co., LTD is a well-known manufacturer as well as supplier of Stainless Steel 347H Bar. These bars which we offer are made from best metals and have accurate composition. These bars you can avail if you want from us at the market leading rates. This 347h alloy is austenitic, stabilized as well as chromium steel containing alloy, also it contains columbium which enables elimination of the carbide precipitation as well as intergranular corrosion test. This alloy bar is stabilized by adding tantalum as well as chromium. It offers the higher creep as well as stress rupture properties, that may be used for exposure where intergranular as well as sensitization are of concern. Adding of columbium enables this alloy to have the best corrosion resistance. this Stainless Steel 347H Bar shows use in the fabrication of the equipment which are to be placed in the severe corrosive conditions. This grade of a bar can easily be annealed at the temperature ranging between 1010 °C to 1193°C. Our clients can avail these Stainless Steel 347H Rods (SS 347H Rods) at the most nominal prices. With respect to national and international quality of raw materials, we also offer these UNS S34709 Round Bars (also known as WNR 1.4961 Bars) in customized sizes and thicknesses as per specific demands by our esteemed clients at market leading prices.

 

Specification of 347H Stainless Steel Round Bars

 

Dimensions

ASTM, ASME, DIN, BS, EN, IS, AMS, JIS, IBR & Other International Standards.

Standard

ASTM A276, ASTM A479

347H SS Round Bars

Outside Diameter in the range of 4mm to 500mm

SS 347H Square Bar

18mm – 47mm (11/16" to 1-3/4")

Stainless Steel 347H Bright Bars

Outside Diameter in the range of 4mm to 100mm

347H Stainless Steel Hex Bar

18mm – 57mm (11/16" to 2-3/4")

Stainless Steel 347H Flat Bar

1/2" to 10" in thickness range of 2mm to 150mm, Custom Size Stainless Steel Flats available

Length

1 to 6 Meters, Custom Cut Lengths

Form

Round, Square, Hex, Flat, Rectangular, Forged, Rod etc.

Finish

Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish

Inspection & Test Reports

EN 10204 3.1, Mill Test Certificates, Chemical Reports, PMI Test Reports, Mechanical Reports, Third Party Inspection, NABL Approved Lab, Visual Inspection, Destructive Test and Non Destructive Test Reports

 

Mechanical & Physical Properties of Stainless Steel 347H bars

 

Property

Value

Density

7.9 g/cm³

Melting Point

1399–1427°C (2550–2599°F)

Tensile Strength

≥515 MPa (75,000 PSI)

Yield Strength (0.2% Offset)

≥205 MPa (30,000 PSI)

Elongation

≥40%

 

Manufacturing Technology of stainless steel 347H bars

 

Stainless steel 347H bars are also known as WNR 1.4961 bars which are accessible to the customers in different diameter, thickness as well as sizes. These bars are manufactured in the various shapes like the round bars, square bars, hex bars, and flat bars well as bright bars. The finishing given to the surface of the bars are the BA finish, matt finish, rough turned, bright polished and black. The forms which are offered are the billet, rectangular, forging as well as an ingot. All of these bars which we produce are guarantees and are 100 % safe for use. To guarantee that the product posses all the qualities as told before we conduct a certain test. These tests are the heat test, eddy current test, corrosion test, PMI test, raw material test, flattening test, hardness test, etc. other important tests are a tensile test, durability test, micro, and macro test. Thus, if any errors found when examining the product by these test then the product is reprocessed and all the errors are eliminated. now, the final product is thoroughly checked by the third party which sees that manufactured product can withstand harsh condition as well as offer industrial level performance or not. The approved product is documented and reports are made on the basis of tests as well as inspection.

 

Weight Chart of ASME SA276 Stainless steel 347H Bar

 

Diameter or
Width
(mm)

Weight per meter

Sectional Area

Perimeter

Square
(kg)

Round
(kg)

Square
(cm²)

Round
(cm²)

Square
(cm)

Round
(cm)

5.0

0.20

0.15

0.25

0.20

2.0

1.57

5.5

0.24

0.19

0.30

0.24

2.2

1.78

6.0

0.28

0.22

0.36

0.28

2.4

1.88

7.0

0.38

0.30

0.49

0.38

2.8

2.20

8.0

0.50

0.39

0.64

0.50

3.2

2.51

9.0

0.64

0.50

0.81

0.64

3.6

2.83

10

0.73

0.63

1.00

0.79

4.0

3.14

11

0.95

0.75

1.21

0.95

4.4

3.46

12

1.13

0.89

1.44

1.13

4.8

3.77

14

1.54

1.21

1.96

1.54

5.6

4.40

16

2.01

1.58

2.56

2.01

6.4

5.03

18

2.54

2.00

3.24

2.54

7.2

5.65

20

3.14

2.47

4.00

3.14

8.0

6.28

22

3.80

2.98

4.84

3.80

8.8

6.91

25

4.91

3.85

6.25

4.91

10.0

7.85

28

6.15

4.83

7.84

6.16

11.2

8.80

32

8.04

6.31

10.24

8.04

12.8

10.05

36

10.17

7.99

12.96

10.18

14.4

11.31

40

12.56

9.86

16.00

12.57

16.0

12.57

45

15.90

12.49

20.25

15.90

18.0

14.14

50

19.62

15.41

25.00

19.64

20.0

15.71

56

24.62

19.34

31.36

24.63

22.4

17.59

63

31.16

24.47

36.69

31.17

25.2

19.79

71

39.57

31.08

50.41

39.59

28.4

22.31

80

50.24

39.46

64.00

50.27

32.0

25.13

 

Applications of 347H Stainless Steel Round Bars

 

1. Chemical & Petrochemical Industry
Stainless Steel Round Bars 347H used in reactors, heat exchangers, pipelines, and valves exposed to high-temperature corrosive media (e.g., nitric acid, organic solvents). Its niobium-stabilized structure prevents failure due to intergranular corrosion in sensitized conditions.


2. Energy & Power Generation
Stainless Steel Round Bars 347H ideal for boiler components, superheaters, steam headers, and nuclear reactor parts operating at elevated temperatures. Resists creep and oxidation in steam environments, enhancing equipment longevity and safety.


3. Aerospace & High-Temperature Engineering
Stainless Steel Round Bars 347H manufacture of jet engine components, exhaust systems, and structural parts requiring high-strength retention at elevated temperatures. Suitable for applications where weight-to-strength ratio and corrosion resistance are critical.


4. Food & Pharmaceutical Processing
Stainless Steel Round Bars 347H used in processing equipment, sterilization tanks, and conveyor systems due to its non-reactive surface, hygiene, and resistance to cleaning agents and high-temperature sterilization.


5. Automotive & Exhaust Systems
Stainless Steel Round Bars 347H fabrication of exhaust manifolds, catalytic converters, and turbocharger parts exposed to high-temperature exhaust gases, ensuring durability and resistance to thermal fatigue.

347H stainless steel round bars stand out for their unique combination of high-temperature resistance, corrosion protection, and mechanical strength, making them indispensable in industries where performance under harsh conditions is non-negotiable. With JJinie Technology (Jiangsu) Co., LTD commitment to quality and precision manufacturing, customers can rely on our 347H products to meet the most demanding engineering challenges. Contact us today for customized solutions tailored to your application needs.
 

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