ASTM A519 Seamless Mechanical Pipe

ASTM A519 is the standard specification for seamless carbon and alloy steel mechanical tubing, suitable for use in various mechanical and pressure applications. It covers several grades of carbon and alloy steel, providing a versatile solution for different industrial needs.

Chemical Composition

The chemical composition of ASTM A519 pipes varies based on the specific grade of steel used. Here are typical compositions for some common grades:

Chemical Composition (%):

Element	1010	1020	1045	4130	4140
Carbon (C)	0.08-0.13	0.18-0.23	0.43-0.50	0.28-0.33	0.38-0.43
Manganese (Mn)	0.30-0.60	0.30-0.60	0.60-0.90	0.40-0.60	0.75-1.00
Phosphorus (P)	0.04 max	0.04 max	0.04 max	0.035 max	0.035 max
Sulfur (S)	0.05 max	0.05 max	0.05 max	0.040 max	0.040 max
Silicon (Si)	0.10-0.35	0.15-0.35	0.10-0.35	0.20-0.35	0.20-0.35
Chromium (Cr)	–	–	–	0.80-1.10	0.80-1.10
Molybdenum (Mo)	–	–	–	0.15-0.25	0.15-0.25

Mechanical Properties

The mechanical properties of ASTM A519 seamless mechanical pipes vary depending on the grade. Below are typical properties for some common grades:

Mechanical Properties:

Property	1010	1020	1045	4130	4140
Tensile Strength, min (MPa)	365 (53,000)	410 (60,000)	620 (90,000)	675 (98,000)	655 (95,000)
Yield Strength, min (MPa)	195 (28,000)	245 (36,000)	435 (63,000)	435 (63,000)	415 (60,000)
Elongation, min (%)	25	25	16	15	20
Hardness (HB), max	143	156	197	217	241

Specifications

Specifications for ASTM A519 Seamless Mechanical Pipes:

Standard: ASTM A519 / ASME SA519
Type: Seamless
Application: Mechanical and pressure applications, including transport of steam, water, and gas
Manufacturing Process: Hot finished or cold finished
Size Range:
- Outside Diameter (OD): 1/4″ to 12″ (6.35 mm to 304.8 mm)
- Wall Thickness (WT): 0.035″ to 1.500″ (0.89 mm to 38.1 mm)
- Length: Fixed length or random length, typically up to 12 meters (40 feet)

Applications

ASTM A519 seamless mechanical pipes are used in various industries and applications, including:

Automotive Industry:
- Drive shafts
- Axles
- Steering columns
Construction:
- Structural components
- Scaffolding
- Machinery parts
Machinery and Equipment:
- Hydraulic cylinders
- Machine tool spindles
- Precision mechanical components
Oil and Gas Industry:
- Tubing for hydraulic systems
- High-pressure applications
Energy Sector:
- Boiler tubes

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