Chromoly Pipes

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Chromoly Pipes Specification

End Protector
Plastic caps

Tolerance
0.01 mm

Product Type
Chromoly Pipes

Application
Automobile, Industrial Machinery, Aerospace

Surface Finish
Polished

Connection
Welded, Threaded

Material
Chromoly Steel (Alloy of Chromium and Molybdenum)

Section Shape
Round

Standard
ASTM A519, DIN 2391

Technique
Cold Drawn

Surface Treatment
Oil Coated

Alloy or Not
Alloy

Outer Diameter
10 mm to 120 mm

Thickness
1 mm to 12 mm

Size
Customizable

Length
Up to 12 meters

Inside Surface Finish
Smooth

Density
7.85 g/cm

Hardness
Rockwell C35 to C45

Tensile Strength
At least 860 MPa

Corrosion Resistance
Superior

Pipe Marking
Laser etched

Heat Treatable
Yes

Yield Strength
At least 700 MPa

Packaging
Bundled with wrapping or wooden crate

Elongation
15% Minimum

About Chromoly Pipes

What Are Specification Chromoly Pipes?

Specifications	ASTM A519 / ASME SA519
Size Range	1/2 to 6, both OD and NB sizes available
Thickness	50mm to 7.00mm, custom OD and thickness available on request
Type	Seamless
Form	Round Pipes, Square Pipe, Rectangular Pipe.
Length	Single Random, Double Random & Required Length

Equivalent material Of Chromoly Pipes?

STANDARD	WERKSTOFF NR.	UNS	AFNOR	EN	JIS	BS	GOST
AISI 4130	1.7218	G41300	-	25CrMo4	JIS G4105	BS 970	-

Chemical Composition Of Chromoly Pipes?

AISI 4130	Ni	C	Mo	Mn	Si	Fe	Cu	S	P	Cr
AISI 4130	0.50 max	0.28-0.33	0.15-0.25	0.40-0.60	0.15-0.35	97.3-98.22		0.025 MAX	0.035 MAX	0.80-1.10

Mechanical Properties Of Chromoly Pipes?

Density	Melting Point	Yield Strength (0.2%Offset)	Tensile Strength	Elongation
0.28	2580	460 MPa	560 MPa	20 %

Superior Mechanical Properties for Critical Applications

Chromoly pipes stand out due to their exceptional yield strength, tensile strength, hardness, and elongation properties. Designed for environments requiring endurance under load, these pipes are heat treatable, ensuring adaptability to varied operational demands across industries like aerospace, automotive, and machinery manufacturing.

Precision Engineering and Surface Excellence

With precise tolerances (0.01 mm), polished surfaces, smooth interiors, and oil-coated exteriors, these pipes are manufactured for seamless integration into quality-sensitive systems. Laser-etched markings and plastic end protectors further elevate utility, safety, and traceability for global export and supply.

FAQs of Chromoly Pipes:

Q: How are Chromoly pipes manufactured to achieve high strength and durability?

A: Chromoly pipes undergo a cold drawing process, using high-quality chromium-molybdenum alloy steel. They are heat treatable, which enhances their yield and tensile strengths. Each pipe is polished, oil-coated, and features precise tolerances to ensure consistent performance in demanding applications.

Q: What standards and sizes are available for these Chromoly pipes?

A: The pipes comply with ASTM A519 and DIN 2391 standards. They are available in customizable outer diameters (10 mm to 120 mm), thicknesses (1 mm to 12 mm), and lengths up to 12 meters, catering to diverse project requirements across industries.

Q: When should Chromoly pipes be chosen over standard carbon steel pipes?

A: Chromoly pipes are preferred when applications demand superior mechanical strength, enhanced corrosion resistance, and durability under high stress, such as in the aerospace, automotive, and advanced machinery sectors.

Q: Where are these Chromoly pipes typically used?

A: These pipes are widely utilized in the automobile industry, industrial machinery, and aerospace applications where high strength, corrosion resistance, and lightweight properties are essential for safety and efficiency.

Q: What are the benefits of laser-etched marking and plastic end protectors on these pipes?

A: Laser-etched markings provide permanent identification for traceability and quality assurance. Plastic end protectors safeguard the pipe ends during transportation and handling, preventing damage and contamination.

Q: How does the inside surface finish and oil coating enhance pipe performance?

A: A smooth inside surface minimizes friction, facilitating fluid or gas flow and reducing wear. The oil coating offers an additional layer of corrosion protection during shipping, storage, and initial installation.

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