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Global Steel is an established and prominent supplier of Stainless Steel 347/347H Instrumentation Fittings. All our products are manufactured in line with international standards. All products are made using premium quality raw materials and using the latest technology. Stainless Steel 347/347H Instrumentation Fittings can be customized according to size, dimension and surface finish, as per the customer’s needs.
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Stainless Steel 347/347H Instrumentation Fittings are made of an austenitic stainless steel which has excellent corrosion and oxidation resistance. It has better corrosion-resistant properties that Stainless Steel 321 Instrumentation Fittings. After exposure to temperatures in the chromium carbide precipitation range of 800 – 1500°F (427 – 816°C), it possesses exceptional resistance to intergranular corrosion. To 1500°F (816°C), the alloy exhibits good oxidation resistance and creep strength. It displays strength even in low temperatures.
Stainless Steel 347H instrumentation fittings have a higher carbon content as compared to Stainless Steel 347 Instrumentation Fittings. These fittings are suitable for applications requiring enhanced creep resistance and for higher strength at temperatures above 1000°F (537°C).
At moderate temperatures, Stainless Steel 347/347H Instrumentation Fittings can be utilised in nitric solutions, most diluted organic acids, pure phosphoric acid at lower temperatures, and up to 10% diluted solutions at elevated temperatures. In hydrocarbon service, Stainless Steel 347/347H Instrumentation Fittings resist polythionic acid stress corrosion cracking. At mild temperatures, it can also be used in chloride or fluoride-free caustic solutions. Stainless Steel 347/347H Instrumentation Fittings do not perform well in sulphuric acid and chloride solutions.
Imperial Size | 1/2″ to 2″ |
Size | 1/16”OD to 2”OD, 2mm OD to 50mm OD |
Thread | NPT, BSP, BSPT, UNF, ISO, SAE, MS, AN, weld ends etc. |
Pressure Rating | 6000PSI for Stainless Steel, 300/1000/3000PSI for Brass |
Temperature Ratings | Up to 1000°F (537°C) |
Types | Tube to Union, Tube to Male, Tube to Female, Instrument Pipe Fittings, Accessories |
Application | Power/ gas/ petroleum/ chemical/ metallurgy/ shipbuilding etc. |
Our service |
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Test Certificates |
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Production Technique | Forged/ Heat treated and machined. |
STANDARD | WERKSTOFF NR. | UNS | JIS | GOST | EN |
SS 347 | 1.4550 | S34700 | SUS 347 | 08Ch18N12B | X6CrNiNb18-10 |
SS 347H | 1.4961 | S34709 | SUS 347H | – | X6CrNiNb18-12 |
Contact us to get a quick quote for your requirement.
We offer These Stainless Steel 347 / 347H Instrumentation Fittings as per DIN, ISO, JIS or ANSI Standard.
METRIC RANGE | Dimension in mm | |||||||||
Part | T | P | L1 | M | C | D | F | G | H | N |
N0 | mmo/d | Length | Body | Nut | Body | |||||
4mMC2 | 4 | 1/8′ | 31.35 | 9.53 | 16.67 | 14.29 | 12 | 12 | 24.21 | 10.72 |
4mMC4 | 4 | 1/4′ | 35.72 | 14.29 | 16.67 | 14.29 | 14 | 12 | 29.37 | 15.88 |
6mMC2 | 6 | 1/8′ | 33.34 | 9.53 | 18.26 | 15.88 | 14 | 14 | 25.40 | 11.11 |
6mMC4 | 6 | 1/4′ | 33.34 | 14.29 | 18.26 | 15.88 | 14 | 14 | 30.16 | 12.70 |
6mMC6 | 6 | 3/8′ | 38.89 | 14.29 | 18.26 | 15.88 | 19 | 14 | 30.96 | 13.49 |
6mMG8 | 6 | 1/2′ | 44.45 | 19.05 | 18.26 | 15.88 | 22 | 14 | 36.51 | 15.88 |
8mMC2 | 8 | 1/8′ | 34.53 | 9.53 | 19.05 | 16.67 | 14 | 17 | 26.59 | 11.51 |
8mM04 | 8 | 1/4′ | 39.29 | 14.29 | 19.05 | 16.67 | 14 | 17 | 31.35 | 13.10 |
10mM02 | 10 | 1/8′ | 35.72 | 9.53 | 19.84 | 17.46 | 17 | 19 | 27.78 | 11.91 |
10mMC4 | 10 | 1/4′ | 40.48 | 14.29 | 19.84 | 17.46 | 17 | 19 | 32.54 | 13.49 |
10mMC6 | 10 | 3/8′ | 40.48 | 14.29 | 19.84 | 17.46 | 19 | 19 | 32.54 | 13.49 |
10mMC8 | 10 | 1/2′ | 46.04 | 19.05 | 19.84 | 17.46 | 22 | 19 | 38.10 | 15.88 |
10mMC12 | 10 | 3/4′ | 46.83 | 19.05 | 19.84 | 17.46 | 27 | 19 | 38.89 | 15.08 |
12mMC4 | 12 | 1/4′ | 43.66 | 14.29 | 22.23 | 23.02 | 22 | 22 | 33.34 | 11.11 |
12mMC6 | 12 | 3/8′ | 43.66 | 14.29 | 22.23 | 23.02 | 22 | 22 | 33.34 | 11.11 |
12mMC8 | 12 | 1/2′ | 48.42 | 19.05 | 22.23 | 23.02 | 22 | 22 | 38.10 | 12.70 |
12mM012 | 12 | 3/4′ | 49.21 | 19.05 | 22.23 | 23.02 | 27 | 22 | 38.89 | 11.91 |
16mMC6 | 16 | 3/8′ | 44.45 | 14.29 | 22.23 | 24.61 | 24 | 27 | 34.13 | 10.32 |
16mMC8 | 16 | 1/2′ | 49.21 | 19.05 | 22.23 | 24.61 | 24 | 27 | 38.89 | 11.91 |
16mMC12 | 16 | 3/4′ | 49.21 | 19.05 | 22.23 | 24.61 | 27 | 27 | 38.89 | 10.32 |
18mMC8 | 18 | 1/2′ | 50.80 | 19.05 | 22.23 | 24.61 | 27 | 30 | 40.48 | 13.49 |
18mMC12 | 18 | 3/4′ | 50.80 | 19.05 | 22.23 | 24.61 | 27 | 30 | 40.48 | 10.32 |
18mMC16 | 18 | 1″ | 56.36 | 23.81 | 22.23 | 24.61 | 36 | 30 | 46.40 | 14.29 |
20mMC8 | 20 | 1/2′ | 50.80 | 19.05 | 22.23 | 24.60 | 27 | 30 | 40.48 | 13.49 |
20mM012 | 20 | 3/4′ | 50.80 | 19.05 | 22.23 | 24.61 | 27 | 30 | 40.48 | 10.32 |
20mM016 | 20 | 1″ | 56.36 | 23.81 | 22.23 | 14.61 | 36 | 30 | 46.04 | 14.39 |
25mMC12 | 25 | 3/4′ | 57.15 | 19.05 | 26.19 | 30.96 | 36 | 41 | 45.24 | 11.91 |
25mMC16 | 25 | 1″ | 61.91 | 23.81 | 26.19 | 30.96 | 36 | 41 | 50.01 | 13.49 |
METRIC RANGE | Dimention in Inches | |||||||||
Part | T | P | L1 | M | C | D | F | G | H | N |
N0 | mmo/d | Length | Body | Nut | Body | |||||
1MC1 | 1/16 | 1/16 | .94 | .38 | .44 | .34 | 5/16 | 5/16 | .78 | .34 |
1MC2 | 1/16 | 1/8 | 1.00 | .38 | .44 | .34 | 1/2 | 5/16 | .84 | .41 |
2MC1 | 1/8 | 1/16 | 1.19 | .38 | .63 | .53 | 1/2 | 7/16 | .91 | .41 |
2MC2 | 1/8 | 1/8 | 1.19 | .38 | .63 | .53 | 1/2 | 7/16 | .91 | .41 |
2MC4 | 1/8 | 1/4 | 1.41 | .56 | .63 | .53 | 9/16 | 7/16 | 1.13 | .50 |
3MC2 | 3/16 | 1/8 | 1.21 | .38 | .63 | .54 | 7/16 | 1/2 | .95 | .43 |
3MC4 | 3/16 | 1/4 | 1.42 | .38 | .63 | .54 | 9.16 | 1/2 | 1.16 | .54 |
4MC1 | 1/4 | 1/16 | 1.29 | .56 | .70 | .60 | 1/2 | 9/16 | 1.00 | .46 |
4MC2 | 1/4 | 1/8 | 1.29 | .56 | .70 | .60 | 1/2 | 9/16 | 1.00 | .45 |
4MC4 | 1/4 | 1/4 | 1.50 | .75 | .72 | .63 | 9/16 | 9/16 | 1.19 | .50 |
4MC6 | 1/4 | 3/8 | 1.51 | .38 | .70 | .60 | 11/16 | 9/16 | 1.19 | .56 |
4MC8 | 1/4 | 1/2 | 1.73 | .56 | .70 | .60 | 7/8 | 9/16 | 1.44 | .67 |
5MC2 | 5/16 | 1/8 | 1.34 | .38 | .73 | .64 | 9/16 | 5/8 | 1.05 | .46 |
5MC4 | 5/16 | 1/4 | 1.52 | .56 | .73 | .64 | 9/16 | 5/8 | 1.23 | .54 |
6MC2 | 3/8 | 1/8 | 1.38 | .56 | .76 | .66 | 5/8 | 11/16 | 1.09 | .48 |
6MC4 | 3/8 | 1/4 | 1.57 | .75 | .76 | .66 | 5/8 | 11/16 | 1.28 | .57 |
6MC6 | 3/B | 3/8 | 1.57 | .75 | .76 | .66 | 11/16 | 11/16 | 1.28 | .56 |
6MC8 | 3/B | 1/2 | 1.79 | .56 | .76 | .66 | 7/8 | 11/16 | 1.50 | .67 |
6MC12 | 3/8 | 3/4 | 1.82 | .56 | .76 | .66 | 1-1/16 | 11/16 | 1.53 | .68 |
8MC4 | 1/2 | 1/4 | 1.17 | .75 | .86 | .90 | 13/16 | 7/8 | 1.31 | .47 |
8MC6 | 1/2 | 3/8 | 1.71 | .75 | .86 | .90 | 13/16 | 7/8 | 1.31 | .46 |
8MC8 | 1/2 | 1/2 | 1.90 | .56 | .86 | .90 | 7/8 | 7/8 | 1.50 | .54 |
8MC12 | 1/2 | 3/4 | 1.93 | .75 | .86 | .90 | 1-1/16 | 7/8 | 1.53 | .55 |
10MC6 | 5/8 | 3/8 | 1.74 | .56 | .86 | .96 | 15/16 | 1 | 1.34 | .43 |
10MC8 | 5/8 | 1/2 | 1.93 | .75 | .86 | .96 | 15/16 | 1 | 1.53 | .51 |
10MC12 | 5/B | 3/4 | 1.93 | .75 | .86 | .96 | 1-1/16 | 1 | 1.53 | .49 |
12MC8 | 3/4 | 1/2 | 1.99 | .75 | .86 | .96 | 1-1/16 | 1-1/8 | 1.59 | .57 |
12MC12 | 3/4 | 3/4 | 1.99 | .75 | .86 | .96 | 1-1/16 | 1-1/18 | 1.59 | .55 |
12MC16 | 3/4 | 1 | 2.21 | .94 | .86 | .96 | 1-3/16 | 1-1/8 | 1.81 | .68 |
16MC12 | 1 | 3/4 | 2.26 | .75 | 1.04 | 1.23 | 1-3/8 | 1-1/2 | 1.78 | .55 |
16MC16 | 1 | 1 | 2.45 | .94 | 1.04 | 1.23 | 1-3/8 | 1-1/2 | 1.97 | .65 |
Grade | C | Mn | Si | P | S | Cr | Cb | Ni | Fe |
SS 347 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 20.00 | 10xC – 1.10 | 9.00 – 13.00 | 62.74 min |
SS 347H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 8xC – 1.10 | 9.0 -13.0 | 63.72 min |
Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
Application Industry
Instrumentation Fittings applications are as diverse as the industries they serve driven primarily by the aerospace, railway, construction and automotive industries with petrochemical, nuclear, medical, Oil & Gas, Chemical, Pharmaceutical, Food & Beverage, Nuclear, Thermal Power plants, Paper and Pulp, marine and mining, etc.
Hong Kong, Netherlands, Mongolia, Austria, Turkey, Greece, Russia, Thailand, Kuwait, Yemen, Bahrain, South Africa, Bhutan, Tibet, Israel, Estonia, Saudi Arabia, Libya, Oman, Kazakhstan, Peru, Serbia, Mexico, Romania, Gabon, Mexico, Iraq, United States, Zimbabwe, Puerto Rico, Sweden, Namibia, Gambia, Finland, Vietnam, Singapore, New Zealand, Chile, Germany, Costa Rica, South Korea, Malaysia, Bulgaria, India, Iran, Japan, Ghana, Algeria, Macau, Tunisia, Lithuania, Ecuador, Venezuela, Lebanon, Spain, Nigeria, Bangladesh, Brazil, Sri Lanka, Angola, Belarus, Czech Republic, Poland, Ukraine, Norway, Azerbaijan, Canada, Iran, Australia, Nigeria, China, Chile, Belgium, Philippines, Indonesia, Switzerland, Hungary, Croatia, Trinidad & Tobago, United Kingdom, Afghanistan, Pakistan, Italy, Egypt, Kenya, Bolivia, Argentina, France, Denmark, Nepal, Morocco, Portugal, Jordan, United Arab Emirates, Ireland, Qatar, Colombia, Poland, Slovakia, Taiwan.
Gimhae-si, Rio de Janeiro, Riyadh, Ahmedabad, Geoje-si, Dubai, Montreal, Mexico City, Haryana, Bangkok, Busan, Edmonton, La Victoria, Bengaluru, Perth, Noida, Vadodara, Nashik, Hyderabad, Lagos, Navi Mumbai, Istanbul, Melbourne, Gurgaon, Chandigarh, Jeddah, Aberdeen, Granada, Singapore, Calgary, Dallas, Pune, Vung Tau, Kanpur, Muscat, Thane, Baroda, Ranchi, Thiruvananthapuram, Ulsan, Madrid, Houston, London, Sharjah, Coimbatore, Abu Dhabi, Mumbai, Surat, Kuwait City, Caracas, Chiyoda, Jakarta, Hong Kong, Jamshedpur, Faridabad, Lahore, Courbevoie, Brisbane, Ernakulam, New Delhi, Pimpri-Chinchwad, Visakhapatnam, Algiers, Karachi, Ahvaz, Petaling Jaya, Moscow, Tehran, Chennai, Atyrau, Los Angeles, Bhopal, Indore, Al Jubail, Sydney, New York, Bogota, Port-of-Spain, Manama, Ankara, Kuala Lumpur, Colombo, Howrah, Nagpur, Kolkata, Seoul, Secunderabad, Dammam, Al Khobar, Hanoi, Toronto, Cairo, Rajkot, Milan, Jaipur, Doha, Ludhiana, Santiago, Ho Chi Minh City.
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Global Steel is a significant manufacturer and exporter of all ferrous and non-ferrous metals. As a pioneer and leader in the industry, Global Steel is at the forefront of technology and research.
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