Multinox Inc

Stainless Steel 347H Ring

Multinox Inc. is a premier manufacturer, supplier, and stockist of Stainless Steel 347H Rings.

Stainless Steel 347H rings are made from a controlled high-carbon version of the alloy, offering good corrosion resistance, high-heat and creep strength, and good robustness. The chemistry includes chromium (17-20%), nickel (9-13%), and a significant portion of niobium (min. 8 times higher than carbon content). This unique chemical composition provides stability and high-temperature corrosion resistance. Stainless Steel 347H rings are precision-engineered, niobium-stabilized products that maintain overall physical and mechanical properties, along with high-temperature strength even in continuous elevated temperature environments for a longer period of time.

These advanced 347H rings are produced using open-die and closed-die forgings as well as rolling procedures. Each and every ring piece is carefully controlled for dimensional precision, grain structure, and overall mechanical strength. SS 347H rings are available in a wide range of dimensions depending upon outer diameters (145-3000 mm), face heights (up to 49 inches), and weight distribution (ranging up to 60,000 lbs).

These SS 347H rings feature excellent resistance to intergranular corrosion while preventing chromium carbide precipitation during welding procedures at high temperatures. They provide excellent oxidation resistance in continuous high-temperature zones (up to 816°C). Due to the ease of fabrication and welding properties, these rings are the most preferred grade among our clients. 347H rings offer excellent creep and stress-rupture strength in various environments. When applications such as seal flanges, pressure vessel components, turbine parts, or custom-engineered parts operate in high-heat environments and require durability and performance at the same time, 347H rings are considered a superior choice.

We offer different forms such as plate-cut, rolled, forged, and other forms based on clients' requirements. These rings are designed to meet quality standards as well as ASTM A182, ASME SA182, ASTM A479, and ASME SA479 international standards. We are also RoHS and REACH compliant for international supply chains. Multinox Inc. ensures these rings are thoroughly tested to high quality standards, including heat treatment (such as annealing and tempering), destructive and non-destructive tests, to assure complete client satisfaction. Choose Multinox Inc. as your trusted manufacturer and supplier for premium quality Stainless Steel 347H rolled or forged rings with competitive pricing and guaranteed performance.

Specifications

Material Stainless Steel
Form Seamless Rolled Ring, Forged Ring
Manufacturing Process Open Die Forging, Ring Rolling, CNC Machining
Outside Diameter (OD) 145 mm to 3000 mm
Inside Diameter (ID) As per Customer Requirement
Maximum Thickness 300 mm
Maximum Face Height Up to 49 Inches (1245 mm)
Maximum Weight 60,000 lbs (Approx. 27,200 kg)
Tolerance ±0.003" (or as per customer drawing)
Surface Finish Rough Machined, Fully Machined, Bright, Black, Polished
Heat Treatment Annealed, Solution Annealed, Normalized, Quenched & Tempered, As Required
Testing PMI, Ultrasonic Test (UT), Liquid Penetrant Test (LPT), NDT, Hardness Test, Dimensional Inspection
Certification EN 10204 3.1, Mill Test Certificate (MTC)
Standards ASTM, ASME, DIN, EN, ISO (Depending on Material Grade)
Applications Oil & Gas, Petrochemical, Chemical Processing, Marine, Power Plants, Heat Exchangers, Pressure Vessels, Aerospace, Heavy Engineering, Offshore, Fabrication
Packaging Wooden Boxes, Pallets, Bubble Wrap, Export Worthy Packaging
 

Chemical Composition

C
0.08% (347)
0.04–0.10% (347H)
Carbon
Cr
17.0–19.0%
Chromium
Si
0.75%
Silicon
P
0.045%
Phosphorous
S
0.030%
Sulphur
Ni
9.0–13.0%
Nickel
Mn
2.00%
Manganese
Nb
10 × C (Min)
1.00% (Max)
Niobium

Equivalent Grades

STANDARD
SS 347H
Stainless Steel Grade
WERKSTOFF
1.4961
Werkstoff Number
UNS
S34709
Unified Numbering System

Mechanical Properties

75 ksi (Min)
Tensile Strength
92 HRB (Max)
Rockwell Hardness
30 ksi (Min)
Yield Strength
40% (Min)
Elongation

Size Range

Thickness (Inches) Outer Diameter (OD) (Inches) Thickness (mm) Outer Diameter (OD) (mm)
0.20 3.94 - 5.91 5 100 - 150
0.39 5.91 - 7.87 10 150 - 200
0.59 7.87 - 9.84 15 200 - 250
0.79 9.84 - 11.81 20 250 - 300
0.98 11.81 - 15.75 25 300 - 400
1.18 15.75 - 19.69 30 400 - 500
1.57 19.69 - 23.62 40 500 - 600
1.97 23.62 - 31.50 50 600 - 800
2.95 31.50 - 39.37 75 800 - 1000
3.94 39.37 - 59.06 100 1000 - 1500
5.91 59.06 - 78.74 150 1500 - 2000
7.87 78.74 - 98.43 200 2000 - 2500
9.84 98.43 - 118.11 250 2500 - 3000
11.81 118.11 300 3000

Recent Export Deliveries

🇸🇦
Saudi Aramco Total
Al Jubail, Saudi Arabia
304 SS Round Bars, 50mm OD, ASTM A276
Delivered in 7 days
🇺🇸
Hess Corporation
New York City, USA
SS 304 Hex Bars, 40mm A/F, Cold Drawn
Delivered in 14 days
🇬🇧
Shell PLC
London, United Kingdom
304 SS Flat Bars, 100×20mm, Bright Finish
Delivered in 14 days
🇦🇪
ADNOC
Abu Dhabi, UAE
304 SS Square Bars, 40mm, Forged Grade
Delivered in 5 days
🇿🇦
Sasol Limited
Johannesburg, South Africa
SS 304 Hollow Bars, 80mm OD × 20mm wall
Delivered in 21 days
🇩🇪
BASF SE
Ludwigshafen, Germany
304 SS Round Bars 25–100mm, EN 10204 3.2
Delivered in 18 days

Availability of Stainless Steel Rings

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Stainless Steel 316 Ring Stainless Steel 316L Ring
Stainless Steel 316Ti Ring Stainless Steel 310 Ring
Stainless Steel 317L Ring Stainless Steel 321 Ring
Stainless Steel 347 Ring Stainless Steel 347H Ring
Stainless Steel 410 Ring Stainless Steel 416 Ring
Stainless Steel 420 Ring Stainless Steel 430 Ring
Stainless Steel 440 Ring Stainless Steel 440C Ring
Stainless Steel 446 Ring ASTM A268/A268M UNS S44600 Ring
ASTM A268/A268M EN 1.4749 Ring 17-4PH Stainless Steel Ring
15-5PH Stainless Steel Ring  

Latest Prices of Rings

Multinox INC offers Rings at one of the most competitive prices in India. Request the latest Rings Pricelist using the contact form here.