ASTM A333 Grade 7 Seamless Pipe

ASTM A333 Grade 7 Standard covers seamless and welded steel pipe for low temperature service. The ASTM A333 Grade 7 steel involved is similar to AISI 4032 low alloy steel. ASTM A333 Grade 7 pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation.

ASTM A333 Grade 7 covers seamless and welded steel pipe for low temperature service. The Grade 7 alloy steel involved is similar to AISI 4032 low alloy steel.
Seamless and Welded Steel Pipe size for Low-Temperature Service:

• Outer Dimensions: 19.05mm – 114.3mm

• Wall Thickness: 2.0mm – 14 mm

• Length: max 16000mm

Application: Seamless and Welded Steel Pipe for Low-Temperature Service.

Steel grade: ASTM A333 Grade 7, ASME SA333 Gr.7

Packing:Bare packing/bundle packing/crate packing/wooden protection at the both sides of tubes and suitably protected for sea-worthly delivery or as requested.

Inspection and Test: Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test,No-destructive Test, Hydrostatic Test.

Surface treatment: Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.
Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.ASTM A333 Grade 7 Chemical Compositions(%)

Compositions	Data
Carbon(max.)	0.19
Manganese	0.9
Phosphorus(max.)	0.025
Sulfur(max.)	0.025
Silicon	0.13-0.32
Nickel	2.03-2.57
Chromium	…
Other Elements	…

Mechanical properties for ASTM A333 Grade 7 Alloy Steel

Properties	Data
Tensile strength, min, (MPa)	450Mpa
Yield strength, min, (MPa)	240 Mpa
Elongation, min, (%), L/T	30/16.5

Impact requirements:the notched-bar impact properties of each set of three impact specimens, when tested at temperature specified shall be not less than the values prescribed.Referenced Documents

• ASTM A 370 Test Methods and Definitions for Mechanical testing of Steel Products

• ASTM A999/A 999M Specification for General requirements for Alloy and Stainless Steel Pipe.

• ASTM A 671 Specification for General requirements for Alloy and Stainless Steel Pipe

• ASTM E 23 Test Methods for Notched bar Impact testing of Metallic Materials