Forged Austenitic Stainless Steel Disc – Grades 304, 304L,316L,321
Product Details
| Grade: | 304 / 304L / 316L / 321 | Standard: | ASTM A182 / ASME SA182 |
|---|---|---|---|
| Size Range (mm): | Thickness: 10 – 500 OD: 50 – 2500 Custom Sizes Available | Surface: | Rough Forged / Turned / Ground / Polished Pickled / Sandblasting |
Product Description
- Available in 304, 304L, 316L and 321 austenitic stainless steel grades
- 316L grade with molybdenum addition delivers superior chloride and acid corrosion resistance
- Ultra-low carbon composition of 304L & 316L ensures excellent weldability and minimizes intergranular corrosion after welding
- 321 titanium-stabilized grade prevents carbide precipitation under continuous high-temperature working cycles
- High surface cleanliness, hygienic performance and long service life with low maintenance
- Custom hot forging and precision CNC machining available strictly per customer drawings
- Manufactured in full compliance with ASTM A182 and EN 10088 international standards
This series of forged stainless steel discs are precision-manufactured from high-quality austenitic stainless steel, available in 304, 304L, 316L and 321 material grades. Through advanced hot forging and optional finishing processes, the products feature uniform compact internal grain structure, accurate dimensional control and stable mechanical performance, serving as reliable sealing blanks, support plates, flange blanks and structural components for corrosive and high-temperature working environments.
304 is the most widely used general-purpose stainless steel, suitable for most mild to moderate corrosive scenarios.
304L is ultra-low carbon variant of 304, specially designed for heavy welded structures.
316L with molybdenum alloying provides upgraded resistance to chlorides, acids and harsh industrial conditions, the preferred choice for marine and chemical high-corrosion environments.
321 titanium stabilized stainless steel performs reliably under long-term cyclic high temperature service.
304
Classic general-purpose austenitic stainless steel Excellent corrosion resistance in atmospheric, freshwater and mild chemical environments Good mechanical strength, ductility and cold formability Cost-effective solution for most conventional industrial applications
304L
Ultra-low carbon version of 304 stainless steel Effectively avoids intergranular corrosion after welding Ideal for welded structural discs working in moderate corrosive environments
316L
Molybdenum-alloyed austenitic stainless steel Enhanced resistance to chloride ion attack, organic acids and industrial corrosive media Ultra-low carbon content (≤0.03%) greatly reduces welding sensitization risk Ideal for marine, chemical processing and high-hygiene demanding applications
321
Titanium-stabilized heat-resistant austenitic stainless steel Resists carbide precipitation under continuous high temperature operation Excellent creep resistance, perfect for furnace, heat exchanger and boiler disc components
| Grade | EN Standard No. | C ≤ | Si ≤ | Mn ≤ | P ≤ | S ≤ | Cr | Ni | Mo | Ti | N ≤ |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 304 | — | 0.08 | 1.00 | 2.00 | 0.045 | 0.030 | 18.0–20.0 | 8.0–10.5 | — | — | 0.10 |
| 1.4301 | EN 10088 | 0.07 | 1.00 | 2.00 | 0.045 | 0.015 | 17.5–19.5 | 8.0–10.5 | — | — | 0.11 |
| 304L | 1.4307 | 0.03 | 1.00 | 2.00 | 0.045 | 0.015 | 17.5–19.5 | 8.0–11.0 | — | — | 0.11 |
| 316L | — | 0.03 | 1.00 | 2.00 | 0.045 | 0.030 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 | — | 0.10 |
| 1.4404 | EN 10088 | 0.03 | 1.00 | 2.00 | 0.045 | 0.015 | 16.5–18.5 | 10.0–13.0 | 2.0–2.5 | — | 0.11 |
| 321 | 1.4541 | 0.08 | 1.00 | 2.00 | 0.045 | 0.015 | 17.0–19.0 | 9.0–12.0 | — | 5×C~0.70 | 0.10 |
| Property | 304 | 304L | 316L | 321 |
|---|---|---|---|---|
| Minimum Tensile Strength | ≥515 MPa (75 ksi) | ≥485 MPa (70 ksi) | ≥485 MPa (70 ksi) | ≥515 MPa (75 ksi) |
| Minimum 0.2% Yield Strength | ≥205 MPa (30 ksi) | ≥170 MPa (25 ksi) | ≥170 MPa (25 ksi) | ≥205 MPa (30 ksi) |
| Minimum Elongation (50mm gauge) | ≥40 % | ≥40 % | ≥40 % | ≥40 % |
| Maximum Brinell Hardness | ≤201 HB | ≤201 HB | ≤217 HB | ≤201 HB |
We also supply a full range of stainless steel and special alloy forgings for different working conditions:
- Austenitic stainless steel: 310S,347,904L,254SMo,253Ma,A286(Gr.660),430,440,2Cr13Ni2,3Cr13 etc.
- Duplex stainless steel: 2205,2507,S32750,S32760,F51,F55,F60 etc.
- Special alloys: Monel 400/K-500, Inconel 600/625/718, Hastelloy C22/C276,Incoloy 800,925,Nimonic 75/80A/105/263,Nitronic 50(XM-19)/60 etc.
- Alloy steel: 4140, 4340, F11, F22, F91,42CrMo etc.
- Carbon steel:A105,A516 Gr.70,A36,S235JR,P235GH,P355GH etc.
1. Superior Corrosion Resistance
Stable performance in various corrosive media; 316L grade maintains excellent durability in chloride-containing and acidic industrial environments.
2. Excellent Weldability
Low-carbon composition of 304L & 316L ensures sound weld joints and greatly reduces intergranular corrosion risk after welding, suitable for complex fabrication projects.
3. High Temperature Stability
321 titanium stabilized grade avoids sensitization under long-time high temperature circulation, perfect for heat exchange and thermal equipment discs.
4. High Cleanliness & Hygienic Performance
Smooth and dense surface, easy to clean and sanitize, meets the strict hygiene requirements of food, pharmaceutical and other industries.
5. Long Service Life
High mechanical strength and good wear resistance, with low maintenance cost during long-term operation.
- Food and beverage processing equipment sealing discs
- Chemical processing and pharmaceutical machinery structural blanks
- Marine engineering and offshore platform flange discs
- Water treatment and seawater desalination system components
- High-temperature furnace, heat exchanger and boiler supporting discs
- Pulp & paper, textile and general industrial pressure vessel parts
- Pump, valve and pipeline corrosion resistant disc blanks
We provide integrated hot forging and precision machining services, and can produce finished disc components strictly according to customer drawings:
- Turning, milling, planing, drilling, boring, grinding
- Gear cutting, CNC precision machining
- Sizing cutting, surface treatment and finishing
We have supplied a wide range of forged and machined discs, rings, tube sheets, shafts and hollow blanks to customers worldwide.
We have a professional QC inspection team and complete testing equipment to ensure stable and reliable product quality:
- Ultrasonic testing (UT) for internal forging defects
- Tensile and hardness testing for mechanical properties
- High-precision dimensional measurement
- Spectrometer for chemical composition verification
- Metallographic microstructure inspection
Every batch of products undergoes strict inspection before delivery to meet the quality requirements of various engineering projects. Mill Test Certificate (MTC) is available upon request.
Packing
- Inner packaging: waterproof anti-rust polybag for moisture and dust protection
- Outer packaging: reinforced wooden case / wooden pallet, suitable for long-distance international transportation
- Custom packaging solutions available upon request
Lead Time
Normally 10 – 45 days after receipt of advance payment Exact delivery time depends on order quantity, specification complexity and machining requirements
Please send us your required grade, disc outer diameter, thickness, machining drawing and order quantity. Our technical team will provide competitive factory direct price within 24 hours. Free material selection consultation and technical support for all clients.
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