ASTM A519 Grade 4130 is a specification that covers seamless carbon and alloy steel mechanical tubing. Here are the key specifications for ASTM A519 Grade 4130:

Chemical Composition:

Carbon (C): 0.28-0.33%

Manganese (Mn): 0.40-0.60%

Phosphorus (P): 0.035% max

Sulfur (S): 0.040% max

Silicon (Si): 0.15-0.35%

Chromium (Cr): 0.80-1.10%

Molybdenum (Mo): 0.15-0.25%

Mechanical Properties (Typical values for hot-finished tubing):

Tensile Strength: 97,000 psi (670 MPa) min

Yield Strength: 63,000 psi (435 MPa) min

Elongation: 20% min

Heat Treatment:

Grade 4130 tubing is typically supplied in the normalized or annealed condition. It can also be heat treated to improve its mechanical properties.

Applications:

ASTM A519 Grade 4130 tubing is used in various mechanical and pressure applications where high strength-to-weight ratio, good machinability, and weldability are required. Typical applications include aircraft components, structural tubing, and transmission components.

Sizes and Dimensions:

ASTM A519 Grade 4130 tubing is available in a wide range of sizes and thicknesses. It can be supplied in both round and shapes other than round, such as squares, rectangles, and ovals.

Testing and Certification:

The tubing undergoes testing including mechanical testing (tensile, yield, elongation), hardness testing, and non-destructive testing as per ASTM A519 requirements.

Overall, ASTM A519 Grade 4130 tubing is a versatile material known for its excellent strength-to-weight ratio and suitability for various demanding applications in mechanical engineering and related industries.