SAE/AISI 4140 seamless steel pipes
strictly conform to the ASTM A519 / A519M standard
(2) Main Manufacturing Process
& Key Quality Control Metrics
The manufacturing process for ASTM
A519 AISI/SAE 4140 seamless steel pipe encompasses core steps including billet selection, heating, piercing,
rolling, sizing, heat treatment, finishing, and non-destructive testing (NDT). Crucial technical quality metrics
focus on dimensional tolerances, surface quality, mechanical integrity, and
precise chemical compliance. Precision heat treatment (such as
Quenching & Tempering or Annealing) is strictly controlled to ensure
optimal strength and toughness while minimizing impurities for demanding
overseas applications.
(3) Key Applications &
Industrial Uses
Renowned for its outstanding comprehensive mechanical properties, high fatigue resistance, and excellent hardenability, SAE/AISI 4140 seamless alloy steel pipe is widely deployed across:
· Petroleum & Oilfield Machinery:
Drill collars, heavy-duty drill pipes, and downhole tool components.
<! · Construction
& Heavy Equipment: High-strength structural
components, hydraulic cylinder tubes, and pinions.
· Automotive
& Aerospace Engineering: Transmission shafts, drive
axles, and heavy-load structural tubing.
The chemical composition of AISI/SAE
4140 seamless alloy tubing strictly adheres to the ASTM A519 / A519M specification, detailed in the table below:
|
Chemical Element |
Composition Range (wt %) |
Governing Standard |
|
Carbon (C) |
0.38 – 0.43 |
ASTM A519 / A519M |
|
Manganese (Mn) |
0.75 – 1.00 |
ASTM A519 / A519M |
|
Silicon (Si) |
0.15 – 0.35 |
ASTM A519 / A519M |
|
Phosphorus (P) |
≤ 0.025 |
ASTM A519 / A519M |
|
Sulfur (S) |
≤ 0.025 |
ASTM A519 / A519M |
|
Chromium (Cr) |
0.80 – 1.10 |
ASTM A519 / A519M |
|
Molybdenum (Mo) |
0.15 – 0.25 |
ASTM A519 / A519M |
The table below presents the core
mechanical property requirements for SAE/AISI 4140 seamless steel pipe under ASTM A519 / A519M (typically in
Quenched & Tempered / Heat-Treated condition):
|
Property Parameter |
Standard Requirement |
Technical Remarks / Standard Reference |
|
Yield Strength (0.2% Proof
Stress) |
≥551 MPa(80 ksi) |
ASTM A519 / A519M |
|
Tensile Strength |
≥855 MPa(120 ksi) |
ASTM A519 / A519M |
|
Elongation |
≥15%(Gage Length 50mm / 2 in) |
ASTM A519 / A519M |
|
Impact Energy |
≥27J(Charpy V-Notch) |
ASTM A519 / A519M |
|
Hardness |
≤297HBW |
ASTM A519 / A519M |
Professional Achievements
Quality, Service Creates Value!
Shanghai Shengqiu
strictly adheres to the latest ASTM A519/A519M standard
specifications and custom technical agreements to supply premium-grade American
Standard AISI/SAE 4140 seamless alloy steel
pipes & mechanical tubing.
<! · Full Quality Traceability:
Every batch is provided with complete Mill Test Certificates and full NDT
inspection reports.
<! · Global
Shipping & Flexible MOQ: Export-ready packaging with
competitive price-per-ton and fast delivery schedules.
Looking for AISI 4140 stock
lists, MTC samples, or an immediate price quote?
Contact our technical sales engineers today or send us your
inquiry directly!
Shanghai ShengQiu Materials Co., Ltd
WhatsApp:
+8613761124029
Email: sales@sqsteelpipe.com
Website: www.sqsteelpipe.com
