AISI 4130 Steel Round Bar
Form: Round Bar (Black, Peeled, Turned, Ground)
Surface Finish: Black, Peeled, Turned, Polished, Centerless Ground
Condition: Annealed, Normalized, Hardened & Tempered
Production Capacity: 10000 Ton/Month
Third-Party Testing - Optional SGS, TÜV, and ultrasonic testing available
AISI 4130 Steel Round Bar is a versatile chromium-molybdenum alloy steel known for its high strength-to-weight ratio, excellent toughness, and good fatigue resistance. This heat-treatable low-alloy steel offers superior weldability and machinability compared to higher carbon steels, making it ideal for applications requiring high strength and durability. Our 4130 round bars undergo strict quality control to ensure consistent performance in critical applications across aerospace, automotive, and industrial sectors.
Specifications
|
Parameter |
Details |
|
Diameter |
5mm – 300mm |
|
Length |
1000mm – 6000mm (Custom lengths available) |
|
Form |
Round Bar (Black, Peeled, Turned, Ground) |
|
Surface Finish |
Black, Peeled, Turned, Polished, Centerless Ground |
|
Standard |
ASTM A29, AMS 6350, ASTM A519, MIL-S-18729 |
|
Condition |
Annealed, Normalized, Hardened & Tempered |
Chemical Composition of AISI 4130 Steel Round Bar
|
Element |
Content (%) |
|
C |
0.28 – 0.33 |
|
Si |
0.15 – 0.35 |
|
Mn |
0.40 – 0.60 |
|
P |
≤ 0.035 |
|
S |
≤ 0.040 |
|
Cr |
0.80 – 1.10 |
|
Mo |
0.15 – 0.25 |
|
Fe |
Balance |
Mechanical Properties (Normalized & Tempered)
|
Property |
Value |
|
Tensile Strength |
560 – 670 MPa |
|
Yield Strength |
460 – 560 MPa |
|
Elongation |
≥ 25% |
|
Hardness (Brinell) |
180 – 220 HB |
|
Impact Toughness |
40 J (min) |
Equivalent Grades
|
Standard |
Grade |
|
UNS |
G41300 |
|
DIN |
1.7218 |
|
EN |
25CrMo4 |
|
JIS |
SCM430 |
Why Choose Baohui Steel?
Full Material Traceability
We provide AISI 4130 Steel Round Bar Material Test Certification (MTC EN 10204 3.2) with every shipment, ensuring full compliance with international standards.
Rigorous Quality Control
Each batch undergoes chemical analysis, mechanical testing, ultrasonic testing (UT), and magnetic particle inspection (MPI).
Third-Party Validation Available
Optional SGS, TÜV, and Lloyd's inspection reports are available for additional quality assurance.
Global Client Trust
Trusted by 1,000+ clients across aerospace, automotive, and energy sectors in the USA, Germany, UK, India, Japan, and more.
High Repeat Order Rate
85% of customers return for consistent quality and reliable supply chain performance.
Custom Processing Capability
We provide cutting, machining, heat treatment, and surface finishing services per customer requirements.
Application
Aerospace
Manufacturing aircraft structural parts (such as landing gear components and fuselage frames) and engine accessories
Petrochemical
Manufacturing high-pressure oil pipes, drilling equipment components, and oilfield connectors
Machinery
Manufacturing gears, shafts, molds, and high-strength bolts
Automotive and Racing
Manufacturing racing chassis, drive shafts, and key suspension system components
Construction Machinery
Manufacturing high-strength structural parts and hydraulic system components for excavators, cranes, and other equipment
Global Project Supply Record
|
Project |
Country |
Application |
|
Aircraft Landing Gear Manufacturing |
USA |
Structural components |
|
Automotive Racing Components |
Germany |
Performance drive shafts |
|
Oil Field Drilling Equipment |
UAE |
Drill collars and tool joints |
|
Industrial Machinery Parts |
Japan |
Gears and transmission shafts |
|
Construction Equipment |
UK |
Hydraulic cylinder rods |
FAQ
Q: What is the heat treatment process for 4130 steel?
A: 4130 Bar can be normalized at 870°C (1600°F), hardened at 870°C (oil quench), and tempered at 425-650°C (800-1200°F) depending on required hardness.
Q: Can 4130 steel be welded?
A: Yes, 4130 has excellent weldability using TIG, MIG, or stick welding methods. Preheating and post-weld heat treatment are recommended for thick sections.
Q: What is the maximum service temperature?
A: 4130 can be used up to 425°C (800°F) continuously. Above this temperature, mechanical properties begin to degrade.
Q: Do you provide heat-treated bars?
A: Yes, we supply 4130 bars in annealed, normalized, or quenched and tempered conditions per customer specifications.
Request a Quote – Contact Us Today!
Experience the quality and reliability of AISI 4130 Steel Round Bar-trusted by industry leaders worldwide.
WhatsApp: 8613468954786
Email:baohui@bhsteelpipe.com
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