ASTM A519 4130 Seamless Alloy Pipe
AISI/SAE 4130 Seamless Alloy Steel Pipes: Specifications, Chemical Composition & Mechanical Properties
In demanding engineering
applications—including oilfield downhole tools, aerospace components,
motorsport roll cages, and high-pressure fluid systems—AISI/SAE 4130 seamless alloy steel
pipes serve as a globally recognized standard
This technical guide provides a
detailed breakdown of ASTM A519 Grade 4130 seamless
pipes, covering manufacturing standards, chemical composition limits, and
mechanical properties under various heat-treatment conditions to help global
buyers make informed procurement decisions
1. What is AISI/SAE 4130 Alloy Steel? Standards & Core
Applications
Material Definition & Classification
AISI/SAE
4130
(often referred to simply as 4130 Chromoly) is a versatile
medium-carbon alloy steel enriched with Chromium and Molybdenum
Manufacturing Standards & Specification Compliance
For
international trade and export orders, seamless AISI 4130 steel pipes are
primarily manufactured and accepted in accordance with ASTM A519 / A519M
Key Heat Treatments & Processing
To
achieve high purity, uniformity, and dimensional accuracy, premium 4130 tubing
undergoes precision hot-rolling, cold-drawing, or cold-rolling
·
Full Annealed (A)
·
Normalized & Tempered (N+T)
·
Quenched & Tempered (Q+T /
Heat Treated)
Key Industrial Applications
Thanks
to its superior toughness under pressure and shock loads, ASTM A519 4130
seamless tubing is widely utilized across
·
Oil & Gas Equipment: Downhole tools, pressure
manifolds, drill collars, and high-pressure flowlines
·
Aerospace & Defense: Helicopter rotor shafts,
structural airframe tubing, and landing gear parts
·
Automotive & Racing: FIA-spec motorsport roll
cages, suspension arms, and chassis frames
·
Mechanical Machinery: Hydraulic cylinders, heavy
equipment bushings, and drive shafts
2. Chemical Composition Breakdown of AISI/SAE 4130 Alloy Steel
The core "strengthening
code" of 4130 alloy steel lies in the precise ratio of Chromium (Cr) and Molybdenum (Mo), which
significantly improves hardenability and thermal stability
|
Element |
Specification Limit (wt.%) DOCX |
Element |
Specification Limit (wt.%) DOCX |
|
Carbon (C) |
0.28 – 0.33 |
Phosphorus (P) |
≤0.035 |
|
Silicon (Si) |
0.15 – 0.35 |
Sulfur (S) |
≤0.040 |
|
Manganese (Mn) |
0.40 – 0.60 |
Chromium (Cr) |
0.80 – 1.10 |
|
Molybdenum (Mo) |
0.15 – 0.25 |
Copper (Cu) |
≤0.35 |
3. Mechanical Properties of ASTM A519 4130 Seamless Pipes
Mechanical properties vary depending
on the chosen heat treatment condition
|
Mechanical Property |
Annealed Condition (Typical) DOCX |
Normalized & Tempered (Typical) DOCX |
|
Tensile Strength (MPa) |
≥560 |
≥670 |
|
Yield Strength (MPa) |
≥460 |
≥520 |
|
Elongation (%) |
≥21 |
≥18 |
|
Hardness (HBW) |
≥217 |
197 – 241 |
Note: Final mechanical properties
(including Charpy V-Notch impact toughness) can be custom-tailored based on
buyer technical agreements
Sourcing Certified 4130 Tubing from Shanghai ShengQiu Materials
Co., Ltd.
At Shanghai ShengQiu Materials Co.,
Ltd., we adhere strictly to the latest ASTM A519/A519M specifications
and specialized customer agreements
·
Complete Quality Traceability: Fully backed by EN 10204 3.1 /
3.2 Mill Test Certificates (MTC)
·
Custom Processing: Precision cold-drawing, custom
length cutting, and heat treatments (Q+T / N+T) available
·
Global Shipping: Fast, reliable export handling
for oilfield, aerospace, and industrial projects worldwide
Partner with a
Reliable Steel Pipe Supplier Today
We don't just supply steel pipes—we
deliver professional, worry-free engineering solutions for your business
Shanghai ShengQiu Materials Co., Ltd
WhatsApp:
+8613761124029
Email:
sales@sqsteelpipe.com
Website:
www.sqsteelpipe.com
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