What is ASTM A789 ASME SA 789 SAF2507 UNS S32750 (EN 10216–5 1.4410) Stainless Steel?
ASTM A789 ASME SA 789 SAF2507 UNS S32750 (EN 10216–5 1.4410) Stainless Steel is super duplex stainless steel with 25% chromium, 4% molybdenum, and 7% nickel designed for demanding applications which require exceptional strength and corrosion resistance, such as chemical process, petrochemical, and seawater equipment. The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity, and a low coefficient of thermal expansion.

ASTM A789 Super Duplex Steel SAF 2507 Tube Specification :
Dimension : ASTM, ASME and API
ASTM Specification : ASTM A790 / ASME SA790, ASTM A789 / ASME SA A789
ASTM A789 Super Duplex Steel SAF 2507 Tube Size : 1/2″NB TO 12 “NB IN
Seamless Pipe & Tube Size : 1/2” NB – 8” NB
Welded Pipe & Tube Size : 6” NB – 24” NB
Outer Diameter : 6.0-630mm
Thickness : 0.5-45mm
Schedule : SCH20, SCH30, SCH40, STD, SCH80
Type : Seamless / ERW / Welded / Fabricated / CDW
Form : Round Pipe/Tube, Square Pipe/Tube, Rectangular Pipe/Tube, Coiled Tube, “U” Shape, Pan Cake Coils, Hydraulic Tube
Length : Single Random, Double Random & Required Length
End : Plain End, Beveled End, Threaded
ASTM A789-ASME SA789 SAF2507 Equivalent Material
| Alloy | UNS Designation | Werkstoff NR. | Технические характеристики | AFNOR | Класс | DIN | EN | SS |
| 2507 | S32750 | 1.4410 | A/SA789, A/SA790 | Z3 CN 25.06 Az | F53 | X 2 Cr Ni MoN 25.7.4 | 1.4410 | 2328 |
ASTM A789 S32750 (SAF2507) Stainless Steel Tubes Chemical Composition
| C % | Si % | Mn % | P % | S % | Cr % | Ni % | Mo % | N % | Cu % |
| 0.03 max | 0.8 max | 1.2 max | 0.035 max | 0.02 max | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 | 0.50 max |
Труба из дуплексной стали ASTM A789-ASME SA789 SAF2507 Механические свойства
| 0.2% Proof Stress (N/mm2 ) [ksi] minimum | 550[79.8] |
| Ultimate Tensile Strength (N/mm2) [ksi] minimum | 800 [116] |
| Elongation (%) minimum | 25 |
| ardness (HBN) | 270 max |
| Reduction of Cross Section Area (%) | 45 |
| Charpy V-notch Impact at ambient Temp (J) [ft.lb] | 80min [59min] |
| Charpy V-notch Impact at -46°C (J) [ft.lb] | 45av, 35min [33av, 25.8min] |
Труба из дуплексной стали ASTM A789-ASME SA789 SAF2507 Физические свойства
| Density (Kg.m-1) | 7810 |
| Magnetic Permeability | 33 |
| Young’s Modulus (N/mm2) | 199 x 103 |
| Specific Heat, 20°C (J.Kg-1.°K-1) | 475 |
| Fracture Toughness, Kq (MPa.m) | 475 |
| Specific Electrical Resistance, 20°C (µO.m) | 0.80 |
| Thermal conductivity, 20°C (W.m-1.°K-1) | 14.2 |
| Mean coefficient of thermal expansion, 20-100°C (°K-1) | 11.1 x 10-6 |
Pressure Rating of Super Duplex 2507 Tube
| Tube O.D. (В.) | Wall Thickness Of Pipe (Inches) | |||||||
| .028 | .035 | .049 | .065 | .083 | .095 | .109 | .120 | |
| Рабочее давление (фут-фунт/кв. дюйм) | ||||||||
| 1/8 | 7900 | 10100 | ||||||
| 1/4 | 3700 | 4800 | 7000 | 9500 | ||||
| 5/16 | 3700 | 5400 | 7300 | |||||
| 3/8 | 3100 | 4400 | 6100 | |||||
| 1/2 | 2300 | 3200 | 4400 | |||||
| 3/4 | 2200 | 3000 | 4000 | 4600 | ||||
| 1 | 2200 | 2900 | 3400 | 3900 | 4300 | |||
Super Duplex 2507 Tubing Size chart
| Стена | Sizes ( O.D.) |
| .010 | 1/16″ , 1/8″ , 3/16″ |
| .020 | 1/16″ , 1/8″ , 3/16″ , 1/4″ , 5/16″ , 3/8″ |
| .012 | 1/8″ |
| .016 | 1/8″ , 3/16″ |
| .028 | 1/8″ , 3/16″ , 1/4″ , 5/16″ , 3/8″ , 1/2″ , 3/4″ , 1″ , 1 1/2″ , 2″ |
| .035 | 1/8″ , 3/16″ , 1/4″ , 5/16″ , 3/8″ , 7/16″ , 1/2″ , 16″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/4″ , 1 1/2″ , 1 5/8″ , 2″ , 2 1/4″ |
| .049 | 3/16″ , 1/4″ , 5/16″ , 3/8″ , 1/2″ , 16″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/8″ , 1 1/4″ , 1 1/2″ , 1 5/8″ , 2″ , 2 1/4″ |
| .065 | 1/4″ , 5/16″ , 3/8″ , 1/2″ , 16″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/4″ , 1 1/2″ , 1 5/8″ , 1 3/4″ , 2″ , 2 1/2″ , 3″ |
| .083 | 1/4″ , 3/8″ , 1/2″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/4″ , 1 1/2″ , 1 5/8″ , 1 7/8″ , 2″ , 2 1/2″ ,3″ |
| .095 | 1/2″ , 5/8″ , 1″ , 1 1/4″ , 1 1/2″ , 2″ |
| .109 | 1/2″ , 3/4″ , 1″ , 1 1/4″ , 1 1/2″ , 2″ |
| .120 | 1/2″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/4″ , 1 1/2″ , 2″ , 2 1/4″ , 2 1/2″ , 3″ |
| .125 | 3/4″ , 1″ , 1 1/4″ , 1 1/2″ , 2″ , 3″ , 3 1/4″ |
| .134 | 1″ |
| .250 | 3″ |
| .375 | 3 1/2″ |
Standard Tolerances of UNS S32750 Tube
Размер | Standard Tolerances | |||||
| Форма | Стена | ОД | Length and/or coils | ОД | Lengths | Стена |
| Subsea Umbilical Tubing (ASTM A789 & ASTM A790) | 0.039″ to 0.125″ | 3/8″ to 1-1/2″ | Cut lengths to 60′ Coils to 1-1/2″ OD* | ±0.005″ | Coils to 80,000′ (24,384 m) | ±10% |
| Pressure & Corrosion Tubing (ASTM A789) | 0.010″ – 0.220″ | 1/16″ – 4″ | Cut lengths up – 40′ Coils to 1-1/2″ OD | <1-1/2″ ±0.005″ 1-1/2″ to 3″ ±0.010″ 3-1/2″to 4″ ±0.015″ | Random Upto +2″ Cuts +1/8″ -0″ Coils to 80,000′ | ±10 |
Processing
Горячая штамповка
2507 should be hot worked between 1875 F and 2250 F. This should be followed by a solution anneal at 1925F minimum and a rapid air or water quench.
Холодная штамповка
Most of the common stainless steel forming methods can be used for cold working 2507. The alloy has a higher yield strength and lower ductility than the austenitic steels so fabricators may find that higher forming forces, increased radius of bending, and increased allowance for springback are necessary. Deep drawing, stretch forming, and similar processes are more difficult to perform on 2507 than on an austenitic stainless steel. When forming requires more than 10% cold deformation, a solution anneal and quench are recommended.
Термообработка
2507 should be solution annealed and quenched after either hot or cold forming. Solution annealing should be done at a minimum of 1925 F. Annealing should be followed immediately by a rapid air or water quench. To obtain maximum corrosion resistance, heat treated products should be pickled and rinsed.
Приложения
Electronics
Transport and traffic
Pulp and paper industry
Medicine
Fertilizers
Valve & Pumps
Petrochemical
Architecture and construction
Aerospace
Nuclear Power
Energy industry
Chemicals industry
Nickel Alloy in Pulp and Paper
Motor industry
Food and drink
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