ASTM A333 Gr6 Seamless Steel Tubes and pipe

Instruction

Material for Carbon Steel Seamless Tube:  
Carbon and Alloy Steel, ferritic steel
Grade 1A, Grade3, Grade 4, Grade 6A, Grade 7A
 
Manufacture Method:
The pipes are made by seamless and welding process with the addition of no filler metal in the welding operation. So it can be both seam pipe and seamless pipe.
Grade 4 is manufactured by seamless process
 
Heat treatment:
All seamless and welded pipes, other than Grades 8 and 11, are heat treated to control their microstructure in accordance with methods of:

Normalizing

Quenched and Tempered

Double Normalized and Tempeed

 
TABLE 1 Chemical Requirements 

 
A For each reduction of 0.01% carbon below 0.30%, an increase of 0.05% manganese above 1.06% would be permitted to a maximum of 1.35% manganese.
 
TABLE 2 Impact Temperature

 
Tests and Inspection:
Tensile Requirements
Impact Requirements
Mechanical Teing
  - Sampling
  - Transverse or Longitudinal Tensile Test and Flattening Test
  - Hydrostatic Test
  - Impact Test

Reference Documents:
ASTM A370    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 A671    Specification for Electric-Fusion-Welded Steel Pipe for Atmosphere and Low Tempearature
E 23     Test Methods for Notched Bar Impact Testing of Metallic Materials