ASTM A789 is for small size tubes and tubing, mainly used for Pressure vessel such as Heat Exchanger. ASTM A790 is big size stainless steel pipe, mainly used for fluid transportation. Both include Seamless and Welded. What is ASTM A789 and A790? ASTM A789 Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service ASTM A790 Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe StandardItem ASTM A789 ASTM A790 EN 10216-5 Mainly Grade S31803 S32205 S32750 S31803 S32205 S32750 1.4301 1.4307 1.4948  1.43151.4401 1.4404 1.4571  1.45411.4941 1.4845 1.4449  1.44381.4550 1.4912 1.4462  1.4410 Yield Strength(Mpa) ≥450；≥485；≥550 ≥450；≥450；≥550 — Tensile Strength(Mpa) ≥620；≥655；≥800 ≥620；≥655；≥800 — Elongation(%) ≥25；≥25；≥15 ≥25；≥25；≥15 — Hydrostatic Test The Hydrostatic Test shall be in accordance with ASTM A1016.Could be replaced by ECT. The Hydrostatic Test shall be in accordance with ASTM A999.Could be replaced by ECT. The hydrostatic test shall be carried out at a…

Guanyu Tube is a specialized Manufacturer of S31803 Tube and S31803 Pipe. ASTM A789 SA789 S31803 Tubes, S31803 Duplex Tube, S31803 Duplex Pipe, ASTM A790 S31803 Pipe, ASME SA 790 S31803 Pipe. S31803 Stainless Steel is a 22% chromium, 3% molybdenum, 5-6% nickel, nitrogen alloyed duplex stainless steel with high general, localized, and stress corrosion resistance properties in addition to high strength and excellent impact toughness. S31803 Tubes and S31803 Pipe Properties and Character ASME SA789 S31803 Stainless Steel Tubes provides pitting and crevice corrosion resistance superior to 316L or 317L austenitic stainless steel in almost all corrosive media. It also has high corrosion and erosion fatigue properties as well as lower thermal expansion and higher thermal conductivity than austenitic stainless steel.The advantage of a duplex structure is that it combines the favorable qualities of a ferritic alloy stress corrosion cracking resistance and high strength with austenitic alloy ease of fabrication and corrosion resistance. Duplex Steel ASTM A789 S31803 is a nitrogen enhanced duplex stainless steel that…

Due to the high strength of Duplex steel, it is usually possible to save material, such as reducing the wall thickness of the pipe. Take the use of SAF2205 and SAF2507 as an example. SAF2205 is suitable for use in chlorine-containing environments. The material is suitable for oil refining or other process media mixed with chloride. SAF2205 is especially suitable for heat exchangers that use chlorine-containing aqueous solutions or brackish water as the cooling medium. The material is also suitable for diluted sulfuric acid solutions and pure organic acids and their mixtures. Such as: oil pipes in the oil and natural gas industry: crude oil desalination in oil refineries, sulfur-containing gas purification, wastewater treatment equipment; cooling systems that use brackish water or chlorinated solutions. Compared with austenitic stainless steel 1) The yield strength is more than twice that of ordinary austenitic stainless steel, and it has sufficient plastic toughness for…

The steel shall conform to the chemical requirements prescribed in Table 1. Designation C Mn P S Si Ni Cr Mo N Cu Others S31200 0.030 2.00 0.045 0.030 1.00 5.5–6.5 24.0–26.0 1.20–2.00 0.14–0.20 . . . . . . S31260 0.030 1.00 0.030 0.030 0.75 5.5–7.5 24.0–26.0 2.5–3.5 0.10–0.30 0.20–0.80 W 0.10–0.50 S31500 0.030 1.20–2.00 0.030 0.030 1.40–2.00 4.3–5.2 18.0–19.0 2.50–3.00 0.05–0.1 . . . . . . S31803 0.030 2.00 0.030 0.020 1.00 4.5–6.5 21.0–23.0 2.5–3.5 0.08–0.20 . . . . . . S32001 0.030 4.00–6.00 0.040 0.030 1.00 1.0–3.0 19.5–21.5 0.60 0.05–0.17 1.00 . . . S32003 0.030 2.00 0.030 0.020 1.00 3.0-4.0 19.5-22.5 1.50-2.00 0.14-0.20 . . . . . . S32101 0.040 4.0-6.0 0.040 0.030 1.00 1.35-1.70 21.0-22.0 0.10-0.80 0.20-0.25 0.10-0.80 . . . S32202 0.030 2.00 0.040 0.010 1.00 1.00–2.80 21.5–24.0 0.45 0.18–0.26 . . . . . . S32205 0.030 2.00 0.030 0.020…

On Sep 25th, 2020, We export ASTM A789 S32205 (Same with ASME SA789 S32205), OD 38.1mm WT 1.651mm Length 7315mm, Quantity in 3700 Pcs. We finished in very good quality and passed the 3rd Party Inspection, Dimensional Tolerances Outside Diameter – 38.1mm +/- 0.25mm Wall Thickness – 1.65 +/-0.17mm Length – 7315mm -nil +5mm

Stainless Steel Feed Material Preference for Yongxing Special Materials Technology or similar quality manufacturer (to be nominated if not Yongxing) Feed material certificates to be issued to the buyer for approval prior to commencing production PREN Pitting Corrosion Equivalent Adequate corrosion resistance shall be achieved by ensuring the pitting resistance equivalent (PRE) exceeds 36 for all tubes. The pitting resistance equivalent shall be calculated as follows and reported for each heat.PRE = %Cr + (3.3 x %Mo) + (16 x %N) Dimensional Tolerances Outside Diameter – 38.1mm +/- 0.25mm Wall Thickness – 1.65 +/-0.17mm Length – 7315mm -nil +5mm Surface Condition All tubes shall be free of mill scale or any other oxide form that may reduce corrosion resistance in service. Chemical Composition The stainless steel shall STRICTLY conform to the chemical requirements of UNS S32205 Critical Pitting Temperature Corrosion Test A sample from each lot shall be tested in…

Duplex tubes shall be furnished in the solution annealed and water quenched condition. ·Material shall be pickled after the final anneal and water quench to provide surfaces free of discoloration. Heat treatment of all U-bends shall be required. o Tubes shall be heated by induction or electric resistance and held within the temperature range 1870–2010ºF (1020–1100ºC) for UNS S32205 and 1880–2060ºF (1025–1125ºC) for UNS S32750 as permitted by ASTM A789/A789M, Table 2, followed by a rapid cool below 600ºF (315.6ºC) using forced air, inert gas, or water. §  Total time above 600ºF (315.6ºC) shall be less than 5 minutes. §  The full tube bend and a minimum of 305mm of each leg beyond the tangent point of the bend shall be heated to the required bending temperature. §  The controlling temperature shall be measured using a thermocouple or calibrated optical pyrometer. §  The inside diameter (ID) and outside diameter (OD)…

ASTM A789 ASME SA 789 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Tubes Manufacturer

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ASTM A789 A790 ASME SA 789 SA 790 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Duplex Stainless Steel Pipe Manufacturer