AISI 4130 Tubes & Pipes Manufacturer & Supplier - USA Piping Solutions

Hi there, welcome to USA Piping Solution. If your project requires steel that hits that sweet spot of strength, toughness, and great weldability, then AISI 4130 Tubes & Pipes are probably already on your list. We're specialists in supplying this versatile low-alloy steel, widely known as Chromoly Tubes or pipe. As a leading US-based source – handling manufacturing, supply, and stocking – we offer the best of both worlds: extensive global resources combined with personal, responsive service right here in the States. Delivering top-quality Alloy Steel Pipes & Tubes, especially the often-specified ASTM A519 Grade 4130, is central to our business. From aerospace frames to race car chassis and critical oilfield tools, many demanding industries count on 4130's reliable performance. Choosing USA Piping Solutions means you get certified materials meeting tough standards, providing the structural integrity your application absolutely needs.

We understand that for demanding jobs, consistent material properties and exact dimensions are crucial. That’s why we put such emphasis on the quality of our AISI 4130 Seamless Pipe and tubing. Made primarily through seamless processes for outstanding structural uniformity, this material gives you an excellent strength-to-weight advantage. Do you need standard sizes, maybe normalized or already heat-treated to L80 specs, shipped out fast? We likely have them in stock. Or does your build require specific cut lengths, unique heat treatments, or other custom processing? USA Piping Solutions is set up to handle those requests too. You can rely on us for premium AISI 4130 Mechanical Tubing, fully certified and delivered with knowledgeable support and efficient worldwide shipping.

So, What Exactly is AISI 4130 Chromoly?

Let's dive into AISI 4130. That code points to a particular type of low-alloy steel. Unlike plain carbon steels, these alloys get small, carefully measured additions of other elements to enhance their capabilities. For 4130, the key additions are Chromium (Cr) and Molybdenum (Mo) – which is why it gets the common nickname "Chromoly".

How does this "weathering" actually work? It comes down to the specific mix of elements in the steel, especially additions like copper, chromium, nickel, and sometimes silicon and phosphorus. When A847 steel faces the natural wet-and-dry cycles outdoors, these elements encourage the formation of a unique rust layer. Unlike ordinary rust that flakes off and keeps eating away at the steel, this layer—often called a patina—becomes dense, stable, and sticks tightly to the surface. It acts like a natural shield, significantly slowing down further corrosion. This clever trick allows A847 tubes to be used in many structural situations without needing paint or other coatings. This can mean real savings on initial finishing and long-term upkeep, plus it offers a very distinct, evolving visual character.

Breaking down the "4130" number gives clues: "41" tells you it's a Chromium-Molybdenum alloy steel type, and "30" indicates the carbon content is around 0.30% by weight. That moderate carbon level is really the key to its versatility. It's enough carbon to allow the steel to be significantly hardened and strengthened through heat treatment. But it's still low enough to keep the steel remarkably easy to weld using standard methods – a huge advantage compared to higher-carbon alloys that often require special pre-heating and post-heating procedures.

What do the chromium and molybdenum actually do? The Chromium (typically 0.80-1.10%) helps the steel respond well to heat treatment (improving its "hardenability") and adds a bit of extra resistance to corrosion and oxidation, though it's not a stainless steel. The Molybdenum (around 0.15-0.25%) works hand-in-hand with the chromium, boosting hardenability even more, improving the steel's overall toughness (its ability to resist cracking), and enhancing its strength, especially its ability to hold strength at temperatures moderately higher than plain carbon steel can handle.

The result of mixing these elements just right is a material celebrated for its great strength-to-weight ratio, good ability to withstand fatigue, excellent toughness, and, again, that fantastic weldability. It machines well, can be formed without too much trouble (especially when softened by annealing), and responds predictably to heat treatments, allowing you to tailor its strength and hardness. This adaptability makes AISI 4130 Tubes & Pipes suitable for an incredibly wide range of uses. You'll find it in lightweight 4130 Aircraft Tubing, strong motorsport chassis, durable industrial tooling, and critical oilfield components specified as 4130 High Pressure Tubing. When it's made seamlessly to standards like ASTM A519 Grade 4130, it provides maximum structural consistency and is ready for tough jobs.

AISI 4130 Specifications: The Technical Side

Making sure the material aligns with the correct technical standards is vital for performance and meeting project requirements. USA Piping Solutions supplies AISI 4130 Tubes & Pipes manufactured and tested according to the key industry specifications, mainly ASTM A519 for seamless mechanical products.

Key Technical Specifications

Specification	Details
The Main Standard	ASTM A519 / ASME SA519 – covers Seamless Carbon and Alloy Steel Mechanical Tubing. Grade 4130 is a specific alloy. Even when ordered in pipe sizes (NPS/Schedule), A519 governs tolerances and manufacturing for seamless 4130.
How It's Made	Supplied as Seamless for maximum strength and pressure resistance. Common finishes include: Hot-Finished (HF): Base condition after hot forming. Cold-Drawn (CD): Tighter size control, better surface finish, and increased strength due to cold working.
Material Condition	Available in multiple conditions based on required properties: As-Rolled / As-Drawn: Directly after manufacturing, no heat treatment. Annealed: Softened for easier forming/machining. Normalized: Heat-treated for a uniform structure, better toughness, and improved machinability. Quenched & Tempered (Q&T): Heat treatment to achieve high strength/hardness—often used in oilfield grades like L80 or P110.
Size Range (OD & WT)	Available from small tubing up to 12" NPS and beyond. Wall thickness options include standard to heavy-duty (SCH 120, SCH 160, XXH, up to 1.5"+).
Lengths	Supplied in Single Random, Double Random, or custom-cut lengths as per specification.

Following the ASTM A519 standard ensures the AISI 4130 Mechanical Tubing meets the necessary dimensional, processing, and testing rules for reliable use.

The Steel's Recipe and Strength: Chemistry & Mechanics

The desirable mix of strength, toughness, and weldability in AISI 4130 Tubes & Pipes is a direct result of its carefully balanced chemical formula and the physical properties developed through how it's made and heat treated.

Chemical Composition (Typical Weight %)

Here’s the standard ingredient list for AISI 4130:

Element	Content (%)	Its Role in 4130's Performance
Carbon (C)	0.28 – 0.33	Key for hardness & strength potential, balanced for weldability
Manganese (Mn)	0.40 – 0.60	Helps with hardenability (heat treat response) and strength
Chromium (Cr)	0.80 – 1.10	Major factor in hardenability; adds some corrosion resistance
Molybdenum (Mo)	0.15 – 0.25	Also boosts hardenability, toughness, and hot strength
Silicon (Si)	0.15 – 0.35	Mainly used to deoxidize the steel during production
Phosphorus (P)	≤ 0.040	Impurity, limit is controlled
Sulfur (S)	≤ 0.040	Impurity, limit controlled (can slightly aid machining)

Good to Know: While these are standard ranges, certain projects or specs (like NACE for sour environments) might require even tighter limits on some elements, like sulfur.

Mechanical Property Profile

How strong or hard 4130 is depends heavily on its condition (annealed, normalized, Q&T). Here are typical minimums often seen for common conditions:

Property	Normalized Condition (Approx.)	Q&T Condition (e.g., L80*)	What this Means
Tensile Strength	~560+ MPa (81+ ksi)	689+ MPa (100+ ksi)	How much pulling force it takes to break
Yield Strength	~460+ MPa (67+ ksi)	552-655 MPa (80-95 ksi)	Stress needed to cause permanent stretching/bending
Elongation (in 2")	~20%+	~20%+	How much it can stretch before breaking (ductility)
Hardness	~95 HRB	~23 HRC Max	Resistance to scratching/denting (highly variable)
Impact Resistance	Generally Good to Excellent	Generally Good to Excellent	Ability to absorb sudden impacts (toughness)

*L80 strength levels are defined by the API 5CT standard, often used as a benchmark when heat-treating 4130 pipe for oilfield applications.
It's crucial to remember: hitting specific high-strength properties like L80 or P110 requires very precise Quenching and Tempering heat treatments. USA Piping Solution regularly supplies material expertly heat treated to meet these demanding oilfield specs or other custom property targets.

Available Shapes & Conditions for AISI 4130

USA Piping Solution offers versatile AISI 4130 Tubes & Pipes in different forms and conditions to fit a wide variety of project requirements.

1. Round Tubes / Pipes:
• This is the most frequently requested shape. You can get AISI 4130 Seamless Pipe (which often follows standard pipe sizing like NPS and Schedule but is usually produced under A519 rules) and AISI 4130 Mechanical Tubing (typically ordered by specific Outer Diameter and Wall thickness). The size range available is vast, suitable for structural members, high-pressure fluid lines, and more.
2. Square / Rectangular Tubes:
• Also available as structural tubing. These shapes provide strength along with the convenience of flat surfaces, making them easy to connect and fabricate into frames, chassis, supports, and architectural features.
3. Manufacturing & Finish:
• Seamless: The standard for most 4130 mechanical and pipe products, offering the best structural consistency and pressure handling ability.
• Hot-finished (HF): The basic condition after the material is formed at high temperature.
• Cold Drawn (CD): Provides more precise dimensional tolerances and a smoother surface finish, often preferred for high-precision mechanical parts or hydraulic lines.
4. Heat Treatment Status:
• Annealed: Delivered in the softest possible state, which is best if you plan to do significant bending, forming, or machining.
• Normalized: A common condition that provides a uniform internal structure, generally offering a good mix of strength, toughness, and improved machinability compared to the as-rolled state.
• Quenched & Tempered (Q&T): Specifically heat treated to achieve high strength and hardness levels. We can supply material meeting standard targets like API L80 or P110, or other custom mechanical property requirements needed for challenging applications. NACE compliant heat treatments for sour service are also an option.

This range of options lets you select the 4130 product that precisely matches your manufacturing process and the demands of the final application.

Where Does AISI 4130 Get Used?

The fantastic combination of strength, toughness, weldability, and its ability to be heat-treated makes AISI 4130 Tubes & Pipes a favorite material in many demanding fields:

1. Aerospace: It's heavily used here because of its high strength for its weight and proven reliability. You'll find it in aircraft engine mounts, landing gear parts, structural sections of the fuselage (4130 Aircraft Tubing), helicopter parts, and satellite frames.
2. Motorsports & Performance Cars: A go-to material for building safe and strong roll cages, chassis frames, suspension arms, axles, and other high-stress components where strength, fatigue resistance, and reliable welds are absolutely critical. Chromoly Tubes are almost standard in racing.
3. Oil & Gas Sector: Widely used for making durable downhole tools, drill collars, connectors, high-pressure pipelines (4130 High Pressure Tubing), complex manifolds, valve bodies, and parts for wellhead equipment. It's often heat-treated to L80 or P110 strength levels and sometimes must meet NACE standards for use in sour gas conditions.
4. Power Generation: Used for certain highly stressed components within turbines or in specialized support structures.
5. Hydraulic Systems: Seamless 4130 tubing is frequently chosen for high-pressure hydraulic lines and critical cylinder parts due to its strength and burst resistance.
6. Structural & Mechanical Uses: Found in frames for heavy construction equipment, parts for industrial machinery, strong tooling, manufacturing jigs and fixtures, and other structures needing more strength or toughness than plain carbon steel can offer.
7. Bicycle Frames: Many high-quality bicycle frames, especially for mountain and touring bikes, use 4130 tubing because it offers a desirable mix of strength, relatively low weight, and good ride feel.

Essentially, anytime a design requires steel that is strong, tough, easy to weld, and can be heat-treated to make it even stronger, ASTM A519 Grade 4130 is almost always a material considered.

Finding Your Size: AISI 4130 Dimensions

USA Piping Solution stocks a wide array of common dimensions for AISI 4130 Tubes & Pipes, with a particular focus on sizes used in structural work and the oil and gas industry.

• Pipe Sizes (NPS): We typically carry inventory from 2 inches up through 12 inches, sometimes larger sizes as well.
• Tubing ODs: A broad selection is available, from smaller diameters up to large sizes used for mechanical components.
• Wall Thickness: Our stock emphasizes heavier walls needed for high-pressure and structural integrity. This includes common heavy pipe Schedules (like 120, 140, 160, XXH) and numerous specific heavy wall thicknesses, often up to 1.5 inches thick or even more.

(Note to Design Team: Insert a representative size table here. Focus on NPS x Schedule/Wall examples for pipe, emphasizing heavy walls. Maybe include one or two OD x Wall examples for tubing. Keep it concise.)

Type	Example Size	Example Schedule / Wall	Example Condition
Pipe (A519)	6" NPS	Sch 160	Normalized
Pipe (A519)	8" NPS	1.250" Wall	Q&T (L80)
Tube (A519)	5" OD	0.500" Wall	Annealed
...(add 1 more example)

This table just gives a general idea. Inventory changes constantly. Please get in touch with the 

Quality You Can Rely On: Certifications

Ensuring materials meet tough requirements is vital, especially for critical uses in aerospace or oilfields. USA Piping Solution delivers AISI 4130 Tubes & Pipes with complete certification and compliance proof.

• Primary Standard:
• ASTM A519 / ASME SA519 Grade 4130: We certify full conformance to this standard covering seamless mechanical tubing, including chemistry, manufacturing, and testing.
• Heat Treatment Proof: When supplied heat-treated (Normalized, Q&T), MTRs confirm the process and verify the resulting mechanical properties (Tensile, Yield, Elongation, Hardness) meet targets.
• Oilfield Specs (API/NACE): We can supply material specifically heat-treated and tested to meet standards like API 5CT L80 / P110 mechanicals and/or NACE MR0175 / ISO 15156 for sour service use, when required.
• Quality System:
• ISO 9001:2015: Our operations follow certified quality management practices.
• Material Test Reports (MTRs):
• Provided with shipments (usually EN 10204 3.1 format), these document heat number traceability, chemical analysis, mechanical test results, and heat treatment condition.
• Third-Party Inspection (TPI): We can arrange for additional verification by independent agencies upon request.

Our commitment ensures the Chromoly Tubes you get are fully traceable and meet all specified requirements.

Why USA Piping Solutions for AISI 4130?

Choosing USA Piping Solutions for your AISI 4130 Tubes & Pipes provides reliable material access backed by expert service:

1. Deep 4130 Stock: We hold a large inventory of AISI 4130 Seamless Pipe and tubing in the USA, focusing on various sizes, heavy walls, and common heat treatments (Normalized, Q&T L80/P110).
2. Heat Treatment Options: We specialize in providing material precisely heat-treated to meet specific mechanical property needs, including API and NACE standards.
3. Custom Cutting & More: We offer precision cutting to length and can coordinate other processing services your project might require.
4. Global Shipping Handled: We efficiently manage logistics for domestic and international delivery, providing all necessary documentation.
5. Industry Experience: We're a proven supplier to demanding sectors like aerospace, motorsports, and oil & gas that depend on 4130's performance.
6. Technical Know-How: Our team understands 4130 well and can provide helpful support and guidance.
7. Solid Value: You receive high-quality ASTM A519 Grade 4130 products paired with reliable service at competitive prices.

We aim to be your dependable partner for high-performance Alloy Steel Pipes & Tubes.

Considering Other Alloy Steels?

While AISI 4130 is incredibly versatile, USA Piping Solutions also supplies other related grades:

Ready to Source Your AISI 4130?

Looking for top-tier AISI 4130 Tubes & Pipes for demanding applications in aerospace, motorsports, oil & gas, or mechanical engineering? When you need that winning combination of strength, toughness, and weldability, USA Piping Solutions has you covered.

We supply high-quality Chromoly Tubes and piping, including AISI 4130 Seamless Pipe and AISI 4130 Mechanical Tubing. We offer various forms, sizes, and heat-treated conditions (like L80/P110), all certified to meet rigorous ASTM A519 Grade 4130 standards. Benefit from our ready inventory, fast global shipping, complete MTCs, and international compliance expertise.

Request a Quote Today! Or talk directly with one of our technical specialists about custom sizing, specific heat treatment needs, or general project advice.

Choose USA Piping Solutions for your critical 4130 Aircraft Tubing and 4130 High Pressure Tubing requirements.

Request Your AISI 4130 Quote Today!