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| 起源の場所: | 中国 |
| ブランド名: | YUHONG |
| 証明: | ISO, TUV, PED etc. |
| モデル番号: | A789 S32750 (EN 1.4410、SAF 2507) |
| 最小注文数量: | 1PC |
|---|---|
| 価格: | 交渉可能 |
| パッケージの詳細: | 合板ケース/鉄ケース/プラスチックキャップ付きバンドル |
| 受渡し時間: | 数量により異なります |
| 支払条件: | T/T、L/C を確認できます |
| 供給の能力: | 月産100トン |
| 標準: | ASTM A789 / ASME SA789 | 学年: | UNS S32750 |
|---|---|---|---|
| 共通の名前: | A789 S32750 スーパーデュプレックスチューブ | 製品タイプ: | シームレス冷間引き抜きステンレス鋼熱交換器および凝縮器チューブ |
| 熱処理: | 溶液 焼却 | 配送条件: | アニール、酸洗いおよび不動態化、光輝アニール（オプション） |
| 応用: | 熱交換器、凝縮器、蒸発器、海水冷却および淡水化プラント | NDT: | 渦電流テスト、流体静力学テスト |
A789 S32750 Super Duplex Heat Exchanger Tube, Seamless And Solution Annealed, Eddy Current Test / Hydrostatic Tested
Overview
ASTM A789 S32750 (2507/1.4410) is a premium super duplex stainless steel seamless tube engineered specifically for heat exchangers, condensers and evaporators.
With a balanced 50% austenite and 50% ferrite microstructure, it features high mechanical strength, excellent chloride pitting, crevice and stress corrosion resistance, and superior thermal conductivity.
It is widely used in seawater desalination, offshore oil & gas, petrochemical, power plant and FGD systems for high-pressure, high-temperature and harsh corrosive working conditions.
Key Performance Features
Double yield strength compared to 304/316L
Outstanding resistance to chloride pitting, crevice corrosion & stress corrosion cracking
Good thermal conductivity, higher than austenitic stainless steel
Excellent erosion corrosion & fatigue resistance
Suitable for high pressure & high temperature severe service
Mechanical Properties (Solution Annealed Condition)
Tensile Strength: ≥790 MPa
Yield Strength (0.2% Proof): ≥550 MPa
Elongation: ≥15%
Hardness: ≤310 HB / ≤32 HRC
Microstructure: Balanced 50% Ferrite + 50% Austenite
Manufacturing & Heat Treatment
Process: Seamless → Hot piercing → Cold drawn / Cold rolled
Heat Treatment: Solution annealing at 1020–1100°C, water quenched
Delivery Condition: Annealed, pickled & passivated, bright annealed optional
Available Size Range
Outer Diameter: 6.0mm – 114.3mm
Wall Thickness: 1.0mm – 8.0mm
Standard Length: 6000mm / 12000mm
Custom: U-bend heat exchanger tubes available
Tolerance: Strict OD & WT tolerance per ASTM A789
Chemical Composition for A789 S32750 Super Duplex Heat Exchanger Tube
| Element | Content Limit |
|---|---|
| C | ≤0.03 |
| Mn | ≤1.20 |
| P | ≤0.035 |
| S | ≤0.020 |
| Si | ≤0.80 |
| Cr | 24.00–26.00 |
| Ni | 6.00–8.00 |
| Mo | 3.00–5.00 |
| N | 0.24–0.32 |
Key Performance Features
Application
Heat exchangers, condensers, evaporators
Seawater cooling & desalination plants
Offshore oil & gas platforms
Petrochemical, chemical processing industry
Power plant coastal cooling systems
Flue gas desulfurization (FGD) systems
コンタクトパーソン: Kelly Huang
電話番号: 0086-18258796396
ファックス: 0086-574-88017980
