Yuhong Group Co.,Ltd
| Payment Terms | L/C,T/T |
| Supply Ability | |
| Delivery Time | 7DAYS |
| Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap |
| Standard | ASTM A182 |
| Material | F321H |
| NDT | PT/UT/RT |
| Size | 1/2"~96" |
| Face Type | F.F. & R.F. & R.T.J. |
| Flange Type | Weld-Neck Flange,Lap Joint Flange, Blind Flange, Slip-On Flange, Thread Flange, Socket-Weld Flange, Orifice Flange, Spectacle Flange |
| Brand Name | YUHONG |
| Model Number | ASTM A182 F321H |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Place of Origin | CHINA |
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Product Specification
| Payment Terms | L/C,T/T | Supply Ability | |
| Delivery Time | 7DAYS | Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap |
| Standard | ASTM A182 | Material | F321H |
| NDT | PT/UT/RT | Size | 1/2"~96" |
| Face Type | F.F. & R.F. & R.T.J. | Flange Type | Weld-Neck Flange,Lap Joint Flange, Blind Flange, Slip-On Flange, Thread Flange, Socket-Weld Flange, Orifice Flange, Spectacle Flange |
| Brand Name | YUHONG | Model Number | ASTM A182 F321H |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 | Place of Origin | CHINA |
| High Light | Chemical Industry Stainless Steel Forging Flanges ，F316L Stainless Steel Forging Flanges ，ASME SA182 Steel Flanges | ||
ASTM A182 F321H Stainless Steel Flange for Chemical Industry
ASTM A182 standard specifies the requirements for pipeline flanges, forged fittings, valves, and parts used for high temperature (and generally also applicable to low temperature or corrosive environments) services, covering various grades of austenitic stainless steel such as F304H, F316H, F321H, etc.
F321H is the material grade code specified in the ASTM A182 standard. The "H" suffix stands for High Temperature Service, which means it is designed for high temperature applications. UNS S32109 is its corresponding unified numbering system code (H type usually corresponds to this UNS), which belongs to high carbon titanium stabilized austenitic stainless steel, non-magnetic, with good face-centered cubic crystal structure, toughness, formability, weldability and corrosion resistance.
ASTM A182 F321H Stainless Steel Flange Chemical Composition
| Grade | C | Mn | Si | Cr | Ni | P | S | Ti |
| F312H | 0.04~0.10 | ≤2.00 | ≤0.75 | 17.0~19.0 | 9~12.0 | ≤0.045 | ≤0.03 | 4*(C+N)~0.70 |
ASTM A182 F321H Stainless Steel Flange Main Features
Comparison between ASTM A182 F321H and other related austenitic stainless steel materials
Vs. F304/F304H: F304 belongs to low-carbon stainless steel and has better corrosion resistance at room temperature due to less carbide precipitation. However, its strength in high-temperature environments is significantly lower than that of F304H and F321H. F304H and F321H are both high carbon austenitic stainless steels with good high-temperature strength. However, due to their absence of titanium, intergranular corrosion is prone to occur during welding or exposure to sensitization temperature ranges. F321H addresses this issue by adding titanium, making it safer and more stable during welding and sensitization conditions.
| Grade | Heat Treat Type | Temperature, Minimum or Range, °F [°C]A | Quenching Cool Below °F [°C] |
| F321H | solution treat and quench | 2000 [1095] | 500 [260] |
ASTM A182 F321H Typical Application Areas
Petrochemical Industry: Piping and fittings for catalytic cracking units, reforming units, and heating furnaces.
Power Generation Industry (Thermal/Nuclear Power): High-temperature flange connections for boiler superheaters, reheaters, and main steam pipelines.
Thermal Engineering: Flanges for heat exchangers, high-temperature and high-pressure valves, expansion joints, and other equipment.
Other Process Industries: F321H flanges may be used in any process piping system involving temperatures above 500°C.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller,Other
Year Established:
2007
Total Annual:
50M-70M
Employee Number:
50~850
Ecer Certification：
Verified Supplier
YUHONG HOLDING GROUP is one of the largest Procurement, Engineering & Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, LR, DNV, GL, BV, CCS, KR, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9... YUHONG HOLDING GROUP is one of the largest Procurement, Engineering & Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, LR, DNV, GL, BV, CCS, KR, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9...
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