ASTM B444 Nickel Alloy Steel UNS NO6625 SMLS Bend U Tubes

YuHong can offer ASTM B444 NO6625 seamless nickel ally steel bend U tubes and we sell these products with highest quality in more than 70 countries.

ASTM B444 This specification covers nickel-chromiummolybdenum-columbium alloys (UNS N06625 and UNS N06852) and nickel-chromium-molybdenum-silicon alloy (UNS N06219) in the form of cold-worked seamless pipe and tube.

UNS N06625 products are furnished in two grades of different heat-treated conditions:

Grade 1 (annealed)—Material is normally employed in service temperatures up to 1100°F (593°C).

Grade 2 (solution annealed)—Material is normally employed in service temperatures above 1100°F (593°C) when resistance to creep and rupture is required.

(Note 1:Hot-working or reannealing may change properties significantly, depending on working history and temperatures.)

U tubes are manufactured by bending straight tubes, the process bending is done cold on an automatic U-bend and to ensure tube wall thinning and diameter ovality are controlled, tube bending is accomplished with a mandrel inserted into the tube. Besides, the U-bend of the U-tube is stress relieved under controlled conditions and cycles for extended life.

Specifications

Test Required Bend U tube

Chemical Analysis

Tension

Corrosion Test

Mechanical Tests: Flattening test, Flaring test, Flange test, Hardness Test and Hydrostatic test

Reverse-bend and Re. flat tests

Eddy Current Testing

Visual Inspection

Air Under Pressure Test

Chemical Composition UNS NO6625

Mechanical Property UNS NO6625

*Note: Not applicable to outside diameters under 1⁄8 in. (3.2 mm) and to wall thicknesses under 0.015 in. (0.38 mm). B Hot forming quality pipe and tubing is furnished to chemical requirements and surface inspection only. No tensile properties are required.

D: Annealed at 1600°F (871°C) minimum.

E: Solution annealed at 2000°F (1093°C) minimum, with or without subsequent stabilization anneal at 1800°F (982°C) minimum to increase resistance to sensitization.

Applications Industry

*Gas and Oil Processing

*Pharmaceutical Equipment

*Chemical Equipment

*Power Generation

*Sea Water Equipment

*Petrochemicals

*Heat Exchangers / Condensers / Boiler

*Specialty Chemicals

*Pulp and Paper Industry