ASTM A333 Grade 7 Seamless Pipe

ASTM A333 Grade 7 Standard covers seamless and for low temperature service. The ASTM A333 Grade 7 steel involved is similar to AISI 4032 low . 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


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
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
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