What is SS 347 Sheets & Plates
Standard Specification for SS 347H HR Plates
Equivalent Grades of SS 347 Sheet / Plate /Coil
Chemical Composition of SS 347H Chequered Plate
Mechanical Properties of SS 347 Shim Sheets
People Also Searched for SS 347H HR Plates
Stainless steel plates act as the backbone for heavy-duty industrial builds. We supply these durable metal panels to give your systems long-term protection against harsh impacts, high fluid pressures, and constant chemical wear.
Understanding Stainless Steel 347 and 347H Grades
High-heat operating zones present a major challenge for standard metal alloys. When regular grades get too hot, chromium and carbon bind together, leaving the steel vulnerable to localized rusting around welded joints. Stainless steel 347 directly targets this exact issue. This austenitic alloy is stabilized with niobium,which stops carbide precipitation dead in its tracks.
The 347H variant takes this protection a step higher for intense environments. It features a higher carbon percentage that significantly boosts the material's overall creep strength and resistance to cracking under continuous, heavy loads. We source both options to keep your machinery standing up to tough conditions.
What Makes Stainless Steel 347 Plates Unique?
Standard metals often fail when temperatures climb past 800°F. SS 347 plates are different because they feature a unique chemistry that keeps them entirely stable between 800°F and 1500°F. The hidden advantage here is the added niobium. Niobium holds onto carbon more tightly than chromium does. This chemical trap preserves the chromium content throughout the grain structure, allowing the alloy to fight off oxidizing acids even after extensive welding. You do not need to anneal the plate post-weld, which saves your facility valuable fabrication time.
Key Features of Stainless Steel 347 Plates
- High-Heat Stability: The alloy will hold its mechanical strength and shape without warping at high temperatures.
- Corrosion Resistance: Resists intergranular corrosion effectively around welded seams and highly oxidizing chemical loops.
- Non-Magnetic: Completely non-magnetic after normal annealing treatments.
- Great Fabricability: Our plates may be formed, cut and welded readily by normal shop methods.
Difference Between 347 and 347H Stainless Steel Plates
- Carbon Chemistry: Grade 347 carries a strict low maximum carbon limit. On the other hand, 347H is specifically formulated with a higher, controlled carbon range to survive severe thermal stress.
- Creep Performance: The high-carbon design of 347H grants the plate far better long-term creep strength and superior stress-rupture properties when operating above 1000°F.
- Primary Target Use: Standard 347 fits perfectly into general welded parts facing wet, corrosive chemical solutions. Meanwhile, 347H is the baseline choice for high-pressure boilers and extreme radiant superheaters where heavy loads are constant.
EQUIVALENT GRADE OF SS 347/347H Sheets, Plate & Coils
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
| SS 347 | 1.4550 | S34700 | SUS 347 | X6CrNiTi18-10 |
| SS 347H | 1.4961 | S34709 | SUS 347H | X12CrNiTi18-9 |
Industry Details and Our Services
Documentation and test certifications
We provide comprehensive paperwork directly to your procurement team with every single shipment. This precise traceability allows you to check the provenance of the metal immediately. The paperwork packet shall comprise certified lab reports, commercial invoices, raw material traceability records, welding method specifications, heat treatment charts, Quality Assurance Plans (QAP) and formal guarantee letters.
Quality tests
Defects have nowhere to hide in our facility. We run every batch through intense testing protocols before any plate leaves our warehouse. These evaluations include positive material identification (PMI), intergranular corrosion (IGC) checks, hardness testing, mechanical pull tests, bend testing, pitting resistance checks, flaring, flattening, and optional third-party inspections.
Manufacturing and packaging of the product
We utilize the best raw materials and contemporary gear to provide outstanding dimensional accuracy and flawless surface finishes. We pack your plates on heavy duty crates or sturdy wood pallets to prevent any deep scratches, rust or shipping damage. They are ready for your production lines.
Specification
| Specifications | ASTM A240 / ASME SA240 |
|---|---|
| Width | 1000mm / 1219mm /1250mm / 1500mm / 2000mm |
| Length | 2000 mm / 2440 mm / 2500 mm / 3000 mm / 6000 mm |
| Thickness | 0.1mm to 12 mm Thk |
| Hardness | Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc. |
| Finish | Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated) |
| Form | Coils, Foils, Rolls, Plain Sheet, Strip, Flats, Blank (Circle), Ring (Flange) etc. |
Chemical Composition Of Stainless Steel 347/347H Plates
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti |
| SS 347 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 - 19.00 | 0.10 max | 9.00 - 12.00 | 5(C+N) – 0.70 max |
| SS 347H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 - 19.00 | 0.10 max | 9.00 - 12.00 | 4(C+N) – 0.70 max |
Mechanical Properties Of ASTM A240 Stainless Steel 347/347H Sheets
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
Frequently Asked Questions
The niobium stabilization inhibits the formation of carbides at high temperatures, therefore retaining the steel's structural strength and corrosion resistance in the weld zone.
They are primary choices for high-pressure boilers, aerospace exhausts, heat exchangers, and chemical processing facilities.
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We Offers Following Processing for SS 347/347H Sheets & Plates
Cutting
Forming Drilling / Machining
Grinding
Testing
Price List of Stainless Steel 347/347H Sheets/Plates
Stainless Steel 347/347H HR Plates
US $800-3000 / Metric Ton( FOB Price)
Hot Rolled Stainless Steel 347/347H Plates
US $605-629 / Metric Ton( FOB Price)
Stainless Steel 347/347H Shim Sheets
US $800-4000 / Metric Ton( FOB Price)
Stainless Steel 347/347H Chequered Plate
US $500-800 / Metric Ton( FOB Price)
SS 347/347H Perforated Sheet
US $560-670 / Ton( FOB Price)
Steel 347/347H HR Plates
US $500-900 / Ton( FOB Price)
Applications of Stainless Steel 347 / 347H Plates
Machine building
Pylons and other architectural structures
Lifting and mobile equipment
Construction of bridges
Wearing plates
Framework structures
Crane booms
Rail cars
Stone or iron chutes
Truck frames
Containers
Vehicles and transport equipment
Steel constructions
Anti drill plates such as security doors, shot blasting equipment and tumbling machine
Material
Specialized Products
