ASTM A333 Grade 7 Standard covers seamless and welded steel pipe for low temperature service.

The Grade 7 alloy steel involved is similar to AISI 4032 low alloy steel.
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.

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-worthily 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.