AISI 4130 Forged Bar
4130 Alloy Steel Forged Bar Supplier
At Cromdane Steel, Inc. we offer AISI 4130 alloy steel forgings and 4130 alloy steel forged bar. Our on-hand inventory is managed by our ISO Certified quality management system and is available for immediate saw cut
As a trusted 4130 alloy steel forged bar supplier, we meet stringent customer specifications for all materials with short lead times and quick turnarounds.
4130 Forged Bar Characteristics
AISI/SAE 4130 is a low alloy steel containing chromium and molybdenum as strengthening agents. This steel has good strength and toughness, weldability (due to its low carbon content), and machinability. AISI 4130 is a versatile alloy with good atmospheric corrosion resistance. It has a good combination of strength, toughness and fatigue strength.
4130 forged bar is often used for forged valve bodies and pumps in the following industries:
- Aerospace
- Oil and Gas
- Automotive
- Agricultural
- Military & Defense
Call us today at 713-896-8295 to purchase 4130 alloy steel forged bar or forgings.
Contact a Specialized 410 Alloy Steel Forged Bar Expert Today
The following is an overview of our primary inventory, in-house available for immediate saw cut/delivery. We have steel arriving on regular intervals, so if you do not see what you need, give us a call and let us help you meet your manufacturing/delivery needs.
Why Engineers Specify 4130 Alloy Steel
The chromium-molybdenum composition of 4130 forged bar makes it a go-to for applications that demand a high strength-to-weight ratio without sacrificing toughness. Compared to plain carbon steels, 4130 responds predictably to heat treatment, allowing engineers to dial in tensile and yield strength to meet exact project parameters.
Its low carbon content (0.28-0.33%) reduces the risk of hydrogen-induced cracking during welding, which is a real concern in fabricated assemblies where post-weld heat treatment may not be practical. That combination of hardenability and field weldability keeps 4130 specified across industries where downtime carries a real cost.
| 4130 Mechanical Properties (Typical, Normalized Condition) | |
| Property | Value |
| Tensile Strength | 97,200 psi (670 MPa) |
| Yield Strength | 63,100 psi (435 MPa) |
| Elongation | 25.50% |
| Reduction of Area | 59.60% |
| Brinell Hardness | 197 HB |
Properties vary by heat treatment condition. Our team can provide full MTRs and assist with condition selection for your application.
Industry Applications for 4130 Forged Bar
Procurement teams across several high-stakes industries have standardized on 4130 forged bar because it performs predictably under heat treatment and holds up in cyclic, high-load service. As a leading 4130 alloy steel supplier, we serve industries like:
Oil and Gas
Valve bodies, pump shafts, wellhead components, and subsurface drilling tools frequently call for 4130 forged bar. Its corrosion resistance and machinability keep it competitive with heavier alloys in sour gas environments when combined with appropriate coatings or heat treatment.
Aerospace and Defense
Aircraft structural tubing, landing gear components, and airframe fittings have historically relied on 4130 for its predictable mechanical response under cyclic loading. Defense contractors sourcing forged bar for ground vehicle components and ordnance hardware also count on 4130's weldability for ease of fabrication.
Automotive and Agricultural
Suspension components, axle shafts, tractor linkage pins, and power takeoff shafts are common automotive and agricultural uses. The grade's fatigue strength makes it ideal for high-cycle applications where component failure can lead to significant downtime or safety consequences.
Available Forms and Sizes
Cromdane stocks 4130 alloy steel forged bar in round and square configurations, with inventory available for immediate saw cut. Our Houston facility carries a broad size range to reduce lead time for your project.
- Round Forged Bar: Available across a wide diameter range to suit shaft, valve body, and structural applications
- Square Forged Bar: Stocked for tooling, fixture, and precision-machined component applications
Need a size not shown in our current inventory? New stock arrives at regular intervals. Call us at 713-896-8295, and we will confirm availability or give you a realistic lead time.
Sourcing 4130 Forged Bar Through Cromdane
As a Houston-based 4130 alloy steel forged bar supplier with roots going back to 1982, Cromdane Steel sources all mill-purchased material from North American producers. That sourcing discipline helps meet traceability requirements common in oil and gas and aerospace procurement, where documentation of material origin is part of supplier qualification.
Our ISO-certified quality management system governs incoming inspection, inventory, and saw-cut processing. Every order ships with full mill certifications (MTRs), and our team can coordinate third-party testing or additional certification requirements on request.
We work directly with procurement teams and engineers, not through intermediaries, so questions about condition, chemistry, or delivery get answered by people who know the material.
Related Alloy Steel Grades
If 4130 is under evaluation alongside other chromium-molybdenum grades, we stock the full family:
- 4140 Alloy Steel — higher carbon for increased hardness and wear resistance
- 4145 Alloy Steel — common in downhole drilling tool applications
- 4340 Alloy Steel — nickel-chromium-molybdenum for the highest strength requirements
Get 4130 Forged Bar Quoted Fast
Our Houston inventory is available for immediate saw cut with short lead times. Submit your specifications and quantity, and our team will get a quote back to you promptly. We have been supplying North American alloy steel forged bar to oil and gas, aerospace, and industrial customers since 1982, and we know what documentation, certifications, and turnaround times your procurement process requires.
Frequently Asked Questions About 4130 Forged Bar
Yes. 4130 responds well to quenching and tempering, and the resulting mechanical properties are highly controllable. Tempering temperature directly governs the final hardness and strength, with lower tempering temperatures producing higher hardness at the cost of some ductility. This makes 4130 adaptable for applications with specific API, ASTM, or customer-defined strength requirements. If you need bar supplied in a specific heat-treat condition, contact our team to discuss options before ordering.
4130 forged bar is a solid product produced through hot forging and typically used as feedstock for machined components, shafts, and valve bodies. Seamless tubing, by contrast, starts as a billet and is pierced and drawn to produce a hollow section used primarily in structural airframe and pressure vessel applications. Forged bar generally provides higher mechanical properties than cold-drawn or hot-rolled bar of the same grade because the forging process refines the grain structure. Both products share the same nominal chemistry, but they are not interchangeable for structural applications.
4130 alloy steel forged bar is commonly ordered to ASTM A29 (general requirements for alloy steel bar) or AMS 6370 for aerospace applications. Forged product may also be ordered to customer-specific specifications referencing AISI 4130 chemistry. Cromdane can provide material with full mill certifications traceable to the applicable specification. If your purchase order references a certain specification, include it with your RFQ, and we will confirm compliance before quoting.