ASTM A423 Grade 3 Low-Alloy Steel Tubes
- ASTM A423
- China
- Stock
- Grade 3
ASTM A423 Grade 3 Steel Tubes covers minimum-wall-thickness, seamless and electric-resistance welded, low-alloy steel tubes for pressure containing parts such as economizers or other applications where corrosion resistance is important.
ASTM A423 Grade 3 Low-Alloy Steel Tubes
ASTM A423 Grade 3 Low-Alloy Steel Tubes
Standard：ASTM A423/A423M
Standard Specification for Seanmless And Electric-Welded Low-Alloy Steel Tubes
ASTM A423 Grade 3 Steel Tubes covers minimum-wall-thickness, seamless and electric-resistance welded, low-alloy steel tubes for pressure containing parts such as economizers or other applications where corrosion resistance is important.
ASTM A423 Grade 3 Low-Alloy Steel Tubes sizes and thicknesses usually furnished to this specification are 1/2 to 5 in.[12.7 to 127 mm]in outside diameter and 0.035 to 0.500 in.[0.9 to 12.7 mm] inclusive, in minimum wall thickness.
ASTM A423 Grade 3 Low-Alloy Steel Tubes Quick Details
Company Name: beite steel pipe
Country/Region: China
Product Name：ASTM A423 Grade 3 Low-Alloy Steel Tubes
Types：Seanmless And Electric-Welded Steel Tubes
Outside Diameter：12.7mm——127mm
Wall thickness：0.9mm——12.7mm
Length：6000mm、12000m or specified length as require
Package: Bundles (hexagonal),Wooden Boxes,Crates (steel/wooden)
Port of Shipment：Tianjin,China
Payment：L/C or T/T
Delivery: 7-15 days after payment
Package：Standard export package,suit for all kinds of transport, or as required
Certificate：ISO 9001-2000,PED 97/23/EC,ASME,DNV
Manufacture
ASTM A423 Grade 3 Low-Alloy Steel Tubes made by the seamless process may be hot finished or cold finished.
Heat Treatment
ASTM A423 Grade 3 Low-Alloy Steel Tubes shall be normalized or given such heal treatment
Chemical Composition
| Carbon, max | 0.06 |
| Manganese | 0.70-1.40 |
| Phosphorus | 0.020 max |
| Sullur. max | 0.020 |
| Silicon | 0.55 max |
| Copper | 0.25-0.45 |
| Chromium | .... |
| Nickel | 0.50 max |
| Molybdenum | 0.20 max |
| Antimony | 0.05-0.15 |
Mechanical Properties
| Grade 3 | |
| Tensile strength, min. ksi | 55[380] |
| Yield strength, min, ksi [MPa] | 33[230] |
| Elongation in 2 in. or 50 mm. min, % | 35 |
| For longitudinal strip tests a deduction for each 1/32 in.[0.6 mm] decrease in wall thickness below 5/16in. [8 mm] from the basic minimum elongation of the following percentage points shall be made | 1.25 A |
| Hardness | 170 HB |
A Calculated elongation requirements shall be rounded to the nearest whole number.
NOTE: Mechanical property requirements do not apply to tubing smaller than 1/4 in.[3.2 mm] in inside diameter or 0.015 in.[0.4 mm] in thickness
Forming Operations
Tubes when inserted in the boiler shall stand expanding and beading without showing cracks or flaws.
Mechanical Tests Required
Tension Test
Flattening Test
Flaring Test (Seamless Tubes)
Flange Test (Welded Tubes)
Hardness Test
Reverse Flattening Test
Hydrostatic or Nondestructive Electric Test
Ordering Information
1 Orders for material under this specification shall include the following, as required, to describe the desired material adequately:
1.1 Quantity (feet, metres, or number of lengths),
1.2 Name of material (seamless or electric-resistance-welded tubes).
1.3 Grade (Grade 3).
1.4 Manufacture (hot finished or cold finished).
1.5 Size (outside diameter and minimum wall thickness).
1.6 Length (specific or random),
1.7 Specification designation, and
1.8 Special requirements and any supplementary requirements selected
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