ASTM A511/A511M-04.pdf

If you're sourcing seamless stainless steel mechanical tubing for high-precision engineering, understanding ASTM A511/A511M-04 is essential. This standard covers seamless stainless steel tubing for mechanical applications where dimensional accuracy, smooth internal surfaces, and mechanical strength are critical. Whether you're in aerospace, automotive, or industrial machinery manufacturing, ASTM A511 provides a reliable framework for evaluating tubing quality.

 

ASTM A511/A511M-04.pdf

 

What Is ASTM A511/A511M-04?
ASTM A511/A511M-04 is the American Standard Specification for Seamless Stainless Steel Mechanical Tubing. It defines the technical requirements for:

Grades: Austenitic, Ferritic, Martensitic, and Duplex stainless steels

Manufacturing method: Cold-drawn or hot-finished seamless tubing

Shapes: Round, square, rectangular, and special sections

Tolerances: Tight dimensional tolerances for OD, wall thickness, and length

Mechanical properties: Yield strength, tensile strength, elongation

Surface condition: May include pickled, polished, or bright annealed finishes

 

ASTM A511 Stainless Steel Mechanical Tubing Chemical Composition

ASTM A511 stainless steel mechanical tubing encompasses various grades, each with a specific chemical composition. Common grades include 304, 304L, 316, and 316L, among others. These grades are characterized by varying percentages of carbon, manganese, phosphorus, sulfur, silicon, nickel, and chromium. For example, 304 typically contains 18-20% chromium and 8-10.5% nickel. 316 and 316L contain 16-18% chromium, 10-14% nickel, and 2-3% molybdenum.

ASTM A511 stainless steel cold-Finished pipe tolerances

ASTM A511 specifies tolerances for seamless stainless steel mechanical tubing, including cold-finished round tubing. These tolerances vary based on the outside diameter (OD) and wall thickness of the tubing, with wall thickness tolerances typically being ±10% of the specified wall thickness.

ASTM A511 Hot-Finished Round Tubing Tolerances

These tolerances appiyto cutlengths up to and including 24 ft (7.3 m. For lenghs over 24 ft an additional over tolerance of % in.(3.1 mm for each 10 ft (3 m) or faction thereof shall be permissible, up to a maximum tolerance of ½ in. (12.7 mm).

ASTM A511Cold-/Finished or Hot-/Finished Round Tubing Straightness Tolerances

A common method of measuring straightness is to use a 3-inch (0.9-meter) straightedge and feeler gauge. If measured with a dial indicator, the value obtained is approximately twice the value measured with a straightedge and feeler gauge.

GNEE Offers ASTM A511 Mechanical Tubes

At GNEE, we offer a wide range of ASTM A511-compliant stainless steel mechanical tubing, manufactured with:

Materials: 304, 304L, 316L, 321, 410, 420, 430, 17-4PH, and more

Outer diameters: 6mm – 114mm

Wall thickness: 0.5mm – 10mm

Lengths: Up to 15 meters or cut-to-length

Finishes: Pickled, polished, bright annealed

Certifications: EN 10204 3.1, third-party inspections (SGS, BV, TUV)