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| 起源の場所: | 中国 |
| ブランド名: | YUHONG |
| 証明: | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| モデル番号: | ASTM A790 S31803 |
| 最小注文数量: | 100kg |
|---|---|
| 価格: | 交渉可能 |
| パッケージの詳細: | プラスチック帽子/編まれた箱が付いている層木の場合の/Ironの場合の束 |
| 受渡し時間: | 数量に依存します |
| 支払条件: | L/C、T/T |
| 供給の能力: | 月額1000トン |
| 材料標準: | ASTM A790/ASME SA790 | UNS番号: | S31803 |
|---|---|---|---|
| 同等級: | EN 1.4462 | UNS S32205 |二重2205 | パイプタイプ: | シームレス|溶接 |
| 認定レベル: | EN 10204 3.1 | 3.2 |ノルソク | 終わりの終わり: | プレーンカット|斜め（30-35°）|ねじれ（npt/bsp） |
| ハイライト: | 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:
コンタクトパーソン: Freya
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