A519 4130 4140 Steel Pipe
A519 4130 and 4140 steel pipe are cold-drawn alloy tubes designed for high-strength applications requiring machinability, fatigue resistance, and heat treatment compatibility. These grades are not available from general stockists, so projects needing both 4130 and 4140 in multiple sizes and lengths must source from a mill with dedicated cold-drawing capacity. Jialu Metal holds A519 4130 and 4140 pipe in stock across
- Cold-drawn production ensures dimensional precision and surface finish suitable for machining and high-cycle fatigue service
- 4130 and 4140 grades available in stock, so no need to wait for mill production or split orders across suppliers
- Mixed-grade orders accepted, so one purchase order can include both 4130 and 4140 pipe in different sizes
- One inspection and one shipment for multiple grades and sizes, reducing logistics complexity
Mill certificates issued against the ordered grade and standard. Third-party inspection available on request.
What This Material Is For
A519 4130 and 4140 steel pipe are cold-drawn alloy tubes designed for high-strength applications requiring machinability, fatigue resistance, and heat treatment compatibility. These grades are not available from general stockists, so projects needing both 4130 and 4140 in multiple sizes and lengths must source from a mill with dedicated cold-drawing capacity. Jialu Metal holds A519 4130 and 4140 pipe in stock across standard dimensions, so buyers do not need to place a separate order with a mill, wait for production, and then arrange inspection and shipment separately. One contract covers the full scope, one inspection date, and one shipment.
Why Buyers Choose It
- Cold-drawn production ensures dimensional precision and surface finish suitable for machining and high-cycle fatigue service
- 4130 and 4140 grades available in stock, so no need to wait for mill production or split orders across suppliers
- Mixed-grade orders accepted, so one purchase order can include both 4130 and 4140 pipe in different sizes
- One inspection and one shipment for multiple grades and sizes, reducing logistics complexity
- OEM service available, so branding and marking can be applied per buyer’s specifications
Where It Is Used
- Hydraulic cylinders and actuators requiring 4130 or 4140 tube for high-pressure, high-cycle duty
- Machine shop components such as shafts, spindles, and structural members that are machined after tube forming
- Oil and gas downhole tools and tool joints where strength and fatigue resistance are critical
- Aerospace and defense structural components where material traceability and consistency matter
- Heavy machinery and mining equipment where high-strength, heat-treatable tubing is required
Who It Is For
- Machine shops sourcing 4130 and 4140 tube for machined parts and cylinders
- Fabricators building high-stress structural components for mining, construction or transport equipment
- Oilfield service companies needing tubing for downhole tools and tool joints
- Aerospace and defense contractors requiring heat-treatable alloy tubing with consistent properties
- EPC contractors managing projects with mixed alloy tube requirements across one scope
Problems It Solves
- Need to source 4130 and 4140 from separate mills due to lack of stock availability, leading to multiple inspection dates and shipment schedules
- Delays caused by waiting for cold-drawing production runs, especially when size or length is non-standard
- Inconsistent material quality when buying from non-specialist suppliers who do not control the full process
- Difficulty in consolidating mixed-grade tube orders across multiple suppliers, increasing administrative and logistics burden
- Lack of OEM service for marking, branding or traceability in high-reliability applications
Technical Features
- Cold-drawn production route ensures tight dimensional control and improved surface finish
- Available in round sections only, with standard outside diameters and wall thicknesses held in stock
- Grade coverage includes A519 4130 and 4140, suitable for heat treatment and machining
- Material properties meet the mechanical requirements of A519 for tensile strength, yield strength and elongation
- End preparation available upon request, including beveling and threading for welding or assembly
Grades Standards And Size Range
Values below come from the published product data. Anything not listed is confirmed per enquiry.
| Grade | A519 4130, 4140 |
|---|---|
| Production method | Cold-drawn |
| Section type | Round |
| Material family | Alloy structural steel |
| Heat treatment | Available upon request |
| End preparation | Bevelled, threaded, or plain, as specified |
| Standard | A519 |
| Outside diameter range | TBC |
| Wall thickness range | TBC |
| Length | Cut to length as per order |
| Surface finish | Smooth, clean, free from scale and defects |
| Tolerance | Standard A519 tolerances for OD and wall thickness |
Materials
- 4130 alloy steel for applications requiring high strength, toughness and machinability
- 4140 alloy steel for higher strength and wear resistance, especially after heat treatment
- Both grades are suitable for quenching and tempering to achieve desired hardness and ductility
- Material is sourced from certified billets and processed under controlled conditions
- Traceability maintained through mill certificates and in-house testing
Manufacturing Route
Quality Control
- Chemical composition verified against A519 specification before production
- Mechanical properties tested for tensile strength, yield strength and elongation
- In-house CNAS-certified laboratory conducts routine testing and holds traceable results
- Mill certificates issued per purchase order, including grade, standard, heat number and test results
- Third-party inspection available on request, bookable at order stage
Customisation Options
- Grade and size selected per line item, so one order can include both 4130 and 4140 pipe
- Cut lengths and end preparation specified at order stage
- OEM service accepted for marking, branding or packaging to suit buyer’s requirements
- Packing and labeling arranged per destination port and inspection regime
- Special tolerances or surface finishes discussed upon enquiry
How It Compares With The Alternatives
| Hot-rolled steel pipe | Hot-rolled pipe has lower dimensional accuracy and surface finish; cold-drawn A519 4130/4140 is better suited for machining and high-stress applications |
|---|---|
| Welded steel pipe | Welded pipe has a seam that can be a failure point under cyclic loading; seamless A519 pipe avoids this risk |
| Stainless steel pipe | Stainless grades like 304 or 316 offer corrosion resistance but lack the strength and machinability of 4130/4140 for structural and mechanical use |
Buying Guide
- Start with the required mechanical properties and application environment to select between 4130 and 4140
- Specify the outside diameter, wall thickness, length, and end preparation in the enquiry
- If heat treatment is required, state this at order stage so the process is included
- Send a size table with the enquiry, as availability varies by dimension
- Book third-party inspection at order stage to avoid delays in shipment
Questions About A519 4130 4140 Steel Pipe
What grades of A519 pipe do you supply?
We supply A519 4130 and 4140 steel pipe in cold-drawn form, with standard dimensions held in stock.
Can one order include both 4130 and 4140 pipe?
Yes. Mixed-grade orders are accepted, so one purchase order can include both 4130 and 4140 pipe in different sizes.
Do you offer cold-drawn pipe only?
Yes. A519 4130 and 4140 pipe are cold-drawn to ensure dimensional accuracy and surface quality.
What certification supports the material?
We hold ISO 9001, API Q1, PED, CE, and API 5L, 5CT, 5DP. Our in-house laboratory is CNAS-certified. Mill certificates are issued per order.
Can we arrange third-party inspection?
Yes. Third-party inspection is available on request and is best booked at order stage to align with production.
What payment terms and currencies do you accept?
We accept L/C, T/T, PayPal, and credit card, in USD, CAD, AUD, SGD, EUR, or RMB.
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