Yuhong Holding Group Co., LTD
| Luogo di origine: | Cina |
| Marca: | YUHONG |
| Certificazione: | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Numero di modello: | ASTM A790 S31803 |
| Quantità di ordine minimo: | 100 kg |
|---|---|
| Prezzo: | Negoziabile |
| Imballaggi particolari: | pacco Piega-di legno del caso di /Iron di caso con la capsula di plastica/cassa tessuta |
| Tempi di consegna: | Dipende dalla quantità |
| Termini di pagamento: | L/c, t/t |
| Capacità di alimentazione: | 1000 tonnellate al mese |
| Standard di materiale: | ASTM A790/ASME SA790 | Numero ONU: | S31803 |
|---|---|---|---|
| Grado equivalente: | EN 1.4462 | UNS S32205 | Duplex 2205 | Tipo di tubo: | Senza soluzione di continuità | Saldato |
| Livello di certificazione: | EN 10204 3.1 | 3.2 | Nosok | Rivestimento di conclusione: | Taglio semplice | Smusso (30-35 °) | Filettato (NPT/BSP) |
| Evidenziare: | ASTM A790 duplex stainless steel pipes,EN 10204 3.2 certified S31803 pipes,UNS S31803 seamless stainless pipes |
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ASTM A790 S31803 Duplex Stainless Steel Pipe | UNS S31803 | High Strength Corrosion Resistant Pipes
Meta Description:
Manufacturer of ASTM A790 S31803/2205 duplex steel pipes. Certified EN 10204 3.1, 100% hydro tested, PREN >38. Ideal for offshore, chemical & oil/gas. Request specs.
Our ASTM A790 seamless duplex pipes (UNS S31803) combine austenitic and ferritic microstructures, delivering 2x the yield strength of 316L stainless steel with exceptional chloride stress corrosion cracking (SCC) resistance. Ideal for high-pressure, corrosive environments.
Key Advantages:
Table: Balanced Chemistry of S31803 Duplex Steel Pipe
| Element | Min | Max | Target | Role in Performance |
|---|---|---|---|---|
| Cr | 21.0 | 23.0 | 22.0 | Pitting/Corrosion Resistance |
| Ni | 4.5 | 6.5 | 5.5 | Austenite Stability |
| Mo | 2.5 | 3.5 | 3.0 | Chloride Resistance |
| N | 0.08 | 0.20 | 0.15 | Strength & PRE Boost |
| Mn | - | 2.0 | 1.2 | Deoxidation |
| C | - | 0.030 | 0.02 | Weldability |
| S | - | 0.020 | 0.001 | Machinability |
| P | - | 0.030 | 0.025 | - |
| Fe | Balance |
Table: Cross-Standard Material Equivalents
| Standard | Grade | Common Name | Similarity |
|---|---|---|---|
| UNS | S31803 | Duplex 2205 | Identical |
| EN | 1.4462 | X2CrNiMoN22-5-3 | Direct Equivalent |
| ASME | SA790 | - | Parent Spec |
| GOST | 03Kh22N6M2 | - | Comparable |
| JIS | SUS 329J3L | - | Near Match |
Table: Room-Temperature Mechanical Properties per ASTM A790
| Property | Requirement | Typical Value | Advantage vs. 316L |
|---|---|---|---|
| Tensile Strength | ≥ 620 MPa | 750-895 MPa | +40% Higher |
| Yield Strength (0.2%) | ≥ 450 MPa | 550-625 MPa | 2x Higher |
| Elongation (%) | ≥ 25% | 28-35% | Superior Ductility |
| Hardness (Rockwell C) | ≤ 32 HRC | 28-32 HRC | Optimal for Sour Service |
| Impact Toughness | ≥ 100 J (-50°C) | ≥140 J | Arctic Readiness |
Table: Permissible Variations per ASTM A790/ASME B36.19
| Parameter | Tolerance (Seamless Pipe) | Critical Application Focus |
|---|---|---|
| OD (Outer Diameter) | ±0.8% or ±0.2mm* | Fitting Compatibility |
| Wall Thickness | +20% / -12.5% | Pressure Integrity |
| Straightness | ≤ 0.2% of length | Offshore Installation |
| Cut Length | +3mm / -0mm | Welding Efficiency |
Corrosion-Demanding Environments:
Persona di contatto: Freya
Telefono: +8617276485535
Fax: 0086-574-88017980