This alloy contains 17.0 to 19.0% chromium and 9.0 to 13.0% nickel, with a maximum carbon content of 0.08%. ASTM A240 Type 347 stainless steel plate delivers a minimum tensile strength of 515 MPa (75 ksi) and yield strength of 205 MPa (30 ksi), with 40% elongation in 2 inches. These properties make it well-suited for service between 800°F and 1,600°F (427°C to 871°C), where intergranular corrosion resistance is critical
We supply 347 stainless steel plate in thicknesses from 3 mm to 100 mm, widths up to 2,500 mm, and lengths up to 12,000 mm. Custom sizes are available on request. All material conforms to ASTM A240 / ASME SA-240 and AMS 5512 for aerospace applications. As an ISO 9001 certified supplier, exporter, and stockist, we ship every order with mill test certificates
347 Stainless Steel Plate Specifications
| Parameter | Details |
| Standard | ASTM A240 / ASME SA-240 |
| Thickness | 3 mm to 100 mm (0.118″ to 3.94″) |
| Width | 1,000 mm to 2,500 mm (39″ to 98″) |
| Length | 2,000 mm to 12,000 mm (79″ to 472″); custom lengths available/td> |
| Finish | 2B, 2D, No.1 (HRAP), No.4, BA, Mirror |
| Form | Hot Rolled, Cold Rolled |
| Condition | Annealed |
| Edge | Mill Edge, Slit Edge |
Types of 347 Stainless Steel Plate
SS 347 Chequered Plate
SS 347 Polished Plate
SS 347 Hot Rolled Plate
SS 347 CR Plates
Stainless Steel 347 Clad Plate
Stainless Steel 347 Rolling Plate
Matt PVC SS 347 Plate
2B SS 347 Plates
347 Stainless Steel Plate Chemical Composition
| Element | C | Mn | P | S | Si | Cr | Ni | N | Nb+Ta | Fe |
| Composition (%) | 0.08 max | 2.00 max | 0.045 max | 0.030 max | 0.75 max | 17.0 to 19.0 | 9.0 to 13.0 | 0.10 max | 10xC min, 1.00 max | Balance |
347 Stainless Steel Plate Mechanical Properties
| Property | Tensile Strength (min) | Yield Strength, 0.2% Offset (min) | Elongation in 50 mm or 2 in. (min) | Brinell Hardness (max) | Rockwell B Hardness (max) |
| Value | 515 / 75 | 205 / 30 | 40 | 201 | 92 |
| Unit | MPa / ksi | MPa / ksi | % | HBW | HRB |
347 Stainless Steel Plate Equivalent Grades
| Country / Standard | Designation |
| USA (ASTM/AISI) | AISI 347 / ASTM A240 Type 347 |
| UNS | S34700 |
| Europe (EN / W.Nr) | X6CrNiNb18-10 / 1.4550 |
| Japan (JIS) | SUS 347 |
| UK (BS) | 347S31 |
| France (AFNOR) | Z6CNNb18-10 |
| China (GB) | 06Cr18Ni11Nb (GB/T 20878) |
| Russia (GOST) | 08Kh18N12B |
| India (IS) | IS 6911 Gr X04Cr18Ni10Nb |
| Sweden | SIS 2338 |
| Trade Name | 18/10/Nb stainless steel |
347 Stainless Steel Plate Industrial Applications
Stainless 347 plate serves high-temperature environments between 800°F and 1,600°F, where intergranular corrosion resistance after welding is critical. The following industries rely on this grade.
Chemical & Petroleum Processing
Type 347 stainless steel plate is used in reactor vessels, heat exchangers, and distillation columns exposed to high-temperature corrosive media.
Power Generation & Boiler Equipment
This grade forms superheater tubes, boiler baffles, and expansion joints operating under sustained thermal cycling above 1,000 degrees F.
Aerospace & Aircraft Components
Alloy 347 plate fabricates exhaust manifolds, collector rings, and engine shrouds where oxidation resistance at elevated temperatures is required.
Refinery & Heat Exchangers
Type 347 plate is used in refinery hydroprocessing units, heat exchanger shells, and expansion joints where post-weld heat treatment isn’t practical.
347 Stainless Steel Plate Sizes
| Parameter | Details |
| Thickness Range | 3 mm to 6 mm (thin gauge); 6 mm to 100 mm (standard & heavy plate) |
| Width Options | 1,000 mm, 1,219 mm (48″), 1,500 mm, 2,000 mm, 2,500 mm |
| Length Options | 2,000 mm, 2,438 mm (96″), 3,000 mm, 6,000 mm (240″), up to 12,000 mm (480″) |
| Common Stock Sizes (inch) | 48″ × 96″, 48″ × 120″, 60″ × 120″, 72″ × 120″ |
Distributor of the Following Manufacturers
Aperam
Outokumpu
Nippon Steel
Jindal Stainless (JSL)
JFE Steel Corporation
Stainless Steel 347 Plate Finish Types
| Mumbai (Maharashtra) | Delhi | Bengaluru (Karnataka) | Chennai (Tamil Nadu) |
| Kolkata (West Bengal) | Hyderabad (Telangana) | Ahmedabad (Gujarat) | Pune (Maharashtra) |
| Jaipur (Rajasthan) | Surat (Gujarat) | Chandigarh | Lucknow (Uttar Pradesh) |
| Indore (Madhya Pradesh) | Coimbatore (Tamil Nadu) | Kochi (Kerala) | Visakhapatnam (Andhra Pradesh) |
| Nagpur (Maharashtra) | Patna (Bihar) | Bhopal (Madhya Pradesh) | Vadodara (Gujarat) |
| Mysuru (Karnataka) | Thane (Maharashtra) | Rajkot (Gujarat) | Vijayawada (Andhra Pradesh) |
| Agra (Uttar Pradesh) | Nashik (Maharashtra) | Guwahati (Assam) | Kanpur (Uttar Pradesh) |
| Faridabad (Haryana) | Gurugram (Haryana) | Noida (Uttar Pradesh) | Shimla (Himachal Pradesh) |
| Raipur (Chhattisgarh) | Udaipur (Rajasthan) | Bhubaneswar (Odisha) | Dehradun (Uttarakhand) |
| Ranchi (Jharkhand) | Jamshedpur (Jharkhand) | Chandrapur (Maharashtra) | Dhanbad (Jharkhand) |
| Aligarh (Uttar Pradesh) | Aurangabad (Maharashtra) | Tiruchirappalli (Tamil Nadu) | Srinagar (Jammu & Kashmir) |
| Ludhiana (Punjab) | Warangal (Telangana) | Bikaner (Rajasthan) | Panaji (Goa) |
| Guntur |
Global Supply
We export 347 SS plate to countries across the Middle East, Southeast Asia, Africa, Europe, and North America. All shipments include mill test certificates, inspection reports, and complete documentation.
| Region | Countries | |||||
| Middle East | Oman, Kuwait, Turkey, Yemen, Syria, Jordan, Cyprus, Saudi Arabia, Iran, Iraq, UAE, Qatar, Bahrain | |||||
| Africa | South Africa, Libya, Egypt, Sudan, Gabon, Nigeria, Algeria, Angola, Equatorial Guinea, The Republic Of Congo | |||||
| North America | Costa Rica, Puerto Rico, Trinidad And Tobago, Jamaica, Bahamas, USA, Canada, Mexico, Panama | |||||
| Europe | Netherlands, Belgium, Greece, Portugal, Hungary, Denmark, Russia, Norway, Germany, France, Italy, UK, Spain, Ukraine, Croatia, Slovenia, Malta, Albania, Austria, Switzerland, Slovakia, Finland, Ireland, Czech Republic | |||||
| Asia | India, Japan, Sri Lanka, Maldives, Bangladesh, Myanmar, Taiwan, Cambodia, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea | |||||
| South America | Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, Argentina, Bolivia, Brazil, Chile | |||||
Frequently Asked Questions
What is the difference between 347 and 304 Stainless Steel Plate?
347 stainless steel plate is stabilised with niobium (columbium) to resist intergranular corrosion in the 800 to 1,600 degrees F sensitisation range. 304 plate doesn’t have this stabilisation and can suffer carbide precipitation after welding or prolonged high-temperature exposure. For sustained high-temperature service or heavy welding without post-weld annealing, 347 plate is the better choice.
How does a 347 Stainless Steel Plate compare to a 316 plate?
347 plate relies on niobium stabilisation for high-temperature intergranular corrosion resistance. 316 plate uses molybdenum (2.00 to 3.00%) to resist pitting and crevice corrosion in chloride environments. Select 347 for elevated temperature service and 316 for marine or chloride-rich chemical applications.
What is the operating temperature range for 347 Stainless Steel Plate?
347 SS plate performs best between 800° F and 1,600° F (427 degrees C to 871 degrees C). Niobium stabilisation prevents chromium carbide precipitation across this range. The alloy also retains good toughness at cryogenic temperatures.
Can a 347 Stainless Steel Plate be welded?
Yes, the 347 plate has excellent weldability. Niobium stabilisation removes the need for post-weld annealing in most cases. ER347 or E347 filler metal is recommended for matching chemistry. This makes Alloy 347 plate suitable for heavy welded equipment that can’t be re-annealed after fabrication.
What is the price of a 347 Stainless Steel Plate per kg?
347 stainless steel plate price ranges from Rs. 330 to Rs. 500 per kg in India, and international pricing ranges between USD $5 to $8 per kg. The final price varies by thickness, size, finish, quantity, and current market conditions. Contact us for the latest pricing and availability.
What sizes are available for the 347 SS plate?
We supply 347 stainless steel plates in thicknesses from 0.5 mm to 100 mm, widths up to 2,500 mm, and lengths up to 6,000 mm or 12,000 mm. Custom sizes are available on request with mill test certificates.
What is the difference between 347 and 321 Stainless Steel Plates?
Both grades are stabilised austenitic stainless steels for high-temperature service. 321 plate is stabilised with titanium, while 347 plate uses niobium (columbium). 347 offers slightly better corrosion resistance in strongly oxidising environments and superior creep properties compared to 321.
Is the 347 Stainless Steel Plate magnetic?
No, the 347 stainless steel plate is non-magnetic in the annealed condition due to its austenitic crystal structure. Cold working may produce a slight magnetic response, but the plate remains non-magnetic under normal conditions.
