AISI4130 is a low-alloy chromium-molybdenum steel where 41 in the name AISI4130 is a low-alloy chromium molybdenum steel. The meaning of the 41 in the name is Cr-Mo and the meaning of the 30 is approximately 0.30 percent of carbon. It makes it easier to form and to fabricate, hence 4130 chrome moly tube is often used in industrial constructions. 4130 chromoly tubing is highly performing with tensile strength of approximately 560 Mpa and yield strength of 460 Mpa, with a good level of ductility. Having a melting point of about 1432 C and density of about 7.85 g/cm 3, 4130 chromoly pipes do not oxidize and suffer normal corrosion in normal service. ASTM A519 Grade 4130 pipe is supplied either plain or beveled or threaded end as required and can operate at metal temperatures up to approximately 500 o C when designed to code.
It is an alloy steel AISI 4130 which welds readily with qualified procedures and may be heat treated or machined to provide the necessary strength and toughness. Electropolished 4130 chromoly pipe is also available to have a cleaner inside surface and a smoother flow. With its strength to weight and reliability, chrome moly tube finds its application in the field of aerospace and defense structures, performance automotive chassis and rollover parts, and in mechanical tubing applications that require toughness, weldability, and dimensional accuracy.
Table of Content
- 4130 Chromoly Tubing/AISI 4130 Pipe Suppliers
- AISI 4130 Chromoly Pipe Specifications
- ASTM A519 AISI 4130 Chromoly Tube Chemical Composition
- Mechanical Properties Of AISI 4130 Steel Tube
- Equivalent Grades for AISI 4130 Pipe
- AISI Chromoly 4130 Size
- Alloy Steel AISI 4130 Pipe Weight
- Physical Properties Of 4130 Pipes
- AISI 4130 Pipe Dimensions
- AISI 4130 Chromoly Pipe Outside Diameter (OD) Tolerances
- AISI 4130 Pipes Wall Thickness
- AISI 4130 Pipes Stock Range
- Chromoly 4130 Price
- FAQ’s About Chromoly 4130 Tubing
4130 Chromoly Tubing/AISI 4130 Pipe Suppliers
Kalpataru Piping supplies 4130 chromoly pipes with a focus on precision, smooth finish, corrosion resistance, and high strength. AISI 4130 pipe sizes follow ASTM A519 / ASME SA519 with diameters from 4 mm to 219 mm and wall thicknesses from 0.5 mm to 20 mm. You can order seamless, ERW, welded, or fabricated pipes cut to single random, double random, or custom lengths—up to 13,500 mm.
As a leading 4130 chromoly tubing supplier, we offer AISI 4130 EFW pipes and AISI Werkstoff Nr. 1.7218 pipes in round, square, and rectangular shapes. Our AISI 4130 tubes are produced from hot steel billets and through seamless extrusion, cold rolling, and cold drawing for tight dimensions, clean finish, and higher load capacity in corrosive media. We tailor pipes with annealing, normalizing, and quenching so your tubing meets the required hardness, toughness, and performance for the application.
AISI 4130 Alloy Steel Seamless Pipes, 4130 Chromium Molybdenum Pipe, 4130 Chrome Moly Tubes in Welded Form, Request a Quote Now!
AISI 4130 Seamless Pipe
AISI 4130 Welded Pipe
AISI 4130 ERW Pipe
At Kalpataru Piping, we are committed to providing reliable, high-quality alloy steel products at competitive prices. If you’re looking for AISI 4130 chromoly pipe products or need information about A29 AISI 4140 pipe prices, feel free to reach out to us.
AISI 4130 Chromoly Pipe Specifications
| Specifications | Details |
|---|---|
| Material Grade | AISI 4130 Chromoly Steel |
| Specifications | ASTM A519 / ASME SA519 |
| Dimensions Standard | ASTM, ASME, ANSI B36.10M, ANSI B36.19M |
| Outside Diameter (OD) | 4 mm to 219 mm |
| Wall Thickness (WT) | 0.5 mm to 20 mm |
| Length | Up to 13,500 mm, Single Random, Double Random & Cut Length |
| Type | Seamless, ERW, Welded, Fabricated |
| Form | Round, Square, Rectangular, Hydraulic Tube |
| Ends | Plain End (PE), Beveled End (BE), Threaded |
| Surface Finish | Annealed, Pickled, Bright Annealed, Polished, Black Painted |
ASTM A519 AISI 4130 Chromoly Tube Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.28 – 0.33 |
| Manganese (Mn) | 0.40 – 0.60 |
| Silicon (Si) | 0.15 – 0.35 |
| Chromium (Cr) | 0.80 – 1.10 |
| Molybdenum (Mo) | 0.15 – 0.25 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.040 |
| Iron (Fe) | Balance |
Mechanical Properties of AISI 4130 Steel Tube
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength, ultimate | 560 MPa | 81,200 psi |
| Tensile strength, yield | 460 MPa | 66,700 psi |
| Modulus of elasticity | 190–210 GPa | 27,557–30,458 ksi |
| Bulk modulus (typical for steel) | 140 GPa | 20,300 ksi |
| Shear modulus (typical for steel) | 80 GPa | 11,600 ksi |
| Poisson's ratio | 0.27–0.30 | 0.27–0.30 |
| Elongation at break (in 50 mm) | 21.50% | 21.50% |
| Reduction of area | 59.6% | 59.60% |
| Hardness, Brinell | 217 | 217 |
| Hardness, Knoop (converted from Brinell) | 240 | 240 |
| Hardness, Rockwell B (converted from Brinell) | 95 | 95 |
| Hardness, Rockwell C (converted, below normal HRC range) | 17 | 17 |
| Hardness, Vickers (converted from Brinell) | 228 | 228 |
| Machinability (annealed & cold drawn, vs AISI 1212 = 100%) | 70% | 70% |
4130 Chromoly Equivalent Grades
Equivalent grades for AISI 4130 pipe across international standards.
| Standard | UNS | Werkstoff Nr. | AFNOR | EN | JIS | BS | GOST |
|---|---|---|---|---|---|---|---|
| AISI 4130 | G41300 | 1.7218 | – | 25CrMo4 | JIS G4105 | BS 970 | – |
4130 Chromoly Size — Outside Diameter (OD) × Wall Thickness (WT)
| OD × WT (mm) | OD × WT (mm) | OD × WT (mm) |
|---|---|---|
| 38.1 × 3.2 | 57.0 × 4.9 | 76.2 × 4.0 |
| 38.1 × 4.0 | 57.0 × 6.3 | 76.2 × 5.0 |
| 38.1 × 6.3 | 57.0 × 7.9 | 76.2 × 6.3 |
| 42.4 × 3.2 | 60.3 × 3.2 | 82.5 × 4.5 |
| 42.4 × 4.0 | 60.3 × 3.6 | 88.9 × 3.2 |
| 44.5 × 3.2 | 60.3 × 5.0 | 88.9 × 3.6 |
| 44.5 × 6.3 | 63.5 × 3.2 | 88.9 × 4.0 |
| 48.3 × 3.2 | 63.5 × 3.6 | 101.6 × 3.6 |
| 48.3 × 3.6 | 63.5 × 4.0 | 101.6 × 4.5 |
| 50.8 × 3.2 | 63.5 × 6.3 | 101.6 × 6.3 |
| 50.8 × 3.6 | 63.5 × 7.9 | 114.3 × 3.6 |
| 50.8 × 4.5 | 70.0 × 3.2* | 114.3 × 5.0 |
| 50.8 × 6.3 | 70.0 × 3.6* | 139.7 × 4.0 |
| 57.0 × 3.2 | 70.0 × 6.3* | 139.7 × 5.0 |
| 57.0 × 3.6 | 76.2 × 3.6 | 139.7 × 6.3 |
*Denotes size available on request / limited stock.
AISI 4130 Pipe Dimensions & Weight Chart
Dimensions and weights per linear foot / meter by NPS and schedule.
| NPS | OD (in.) | Schedule | Wall Thickness (in.) | Weight (lb/ft) | Weight (kg/m) |
|---|---|---|---|---|---|
| 1/2" | 0.840 | 40 | 0.109 | 0.85 | 1.27 |
| 3/4" | 1.050 | 40 | 0.113 | 1.13 | 1.68 |
| 1" | 1.315 | 40 | 0.133 | 1.68 | 2.50 |
| 1-1/4" | 1.660 | 40 | 0.140 | 2.27 | 3.38 |
| 1-1/2" | 1.900 | 40 | 0.145 | 2.72 | 4.05 |
| 2" | 2.375 | 40 | 0.154 | 3.66 | 5.45 |
| 2-1/2" | 2.875 | 40 | 0.203 | 5.80 | 8.63 |
| 3" | 3.500 | 40 | 0.216 | 7.58 | 11.28 |
| 4" | 4.500 | 40 | 0.237 | 10.80 | 16.07 |
| 5" | 5.563 | 40 | 0.258 | 14.63 | 21.77 |
| 6" | 6.625 | 40 | 0.280 | 18.99 | 28.26 |
AISI 4130 Pipe Dimensions (OD × WT Reference)
| OD × WT (mm) | OD × WT (mm) | OD × WT (mm) |
|---|---|---|
| 76.2 × 6.3 | 57.0 × 7.9 | 38.1 × 6.3 |
| 76.2 × 5.0 | 57.0 × 6.3 | 38.1 × 4.0 |
| 82.5 × 4.5 | 60.3 × 3.2 | 42.4 × 3.2 |
| 88.9 × 3.6 | 60.3 × 5.0 | 44.5 × 3.2 |
| 88.9 × 3.2 | 60.3 × 3.6 | 42.4 × 4.0 |
| 88.9 × 4.0 | 63.5 × 3.2 | 44.5 × 6.3 |
| 101.6 × 4.5 | 63.5 × 4.0 | 48.3 × 3.6 |
| 101.6 × 3.6 | 63.5 × 3.6 | 48.3 × 3.2 |
| 101.6 × 6.3 | 63.5 × 6.3 | 50.8 × 4.5 |
| 114.3 × 5.0 | 70.0 × 3.2* | 50.8 × 3.6 |
| 76.2 × 4.0 | 57.0 × 4.9 | 38.1 × 3.2 |
| 114.3 × 3.6 | 63.5 × 7.9 | 50.8 × 3.2 |
| 139.7 × 4.0 | 70.0 × 3.6* | 50.8 × 6.3 |
| 139.7 × 6.3 | 76.2 × 3.6 | 57.0 × 3.6 |
| 139.7 × 5.0 | 70.0 × 6.3* | 57.0 × 3.2 |
*Denotes size available on request / limited stock.
4130 Chromoly Physical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
| Melting point | 1432°C | 2610°F |
AISI 4130 Chromoly Pipe Outside Diameter (OD) Tolerances
| NPS (DN) | Oversize Tolerance | Undersize Tolerance |
|---|---|---|
| 1/8" to 1-1/2" (DN 6–40) | +1/64 in. (+0.40 mm) | −1/64 in. (−0.40 mm) |
| Over 1-1/2" to 4" (DN 40–100) | +1/32 in. (+0.79 mm) | −1/32 in. (−0.79 mm) |
| Over 4" to 8" (DN 100–200) | +1/16 in. (+1.59 mm) | −1/32 in. (−0.79 mm) |
| Over 8" to 12" (DN 200–300) | +3/32 in. (+2.38 mm) | −1/32 in. (−0.79 mm) |
| Over 12" (DN 300) | ±1% of the specified outside diameter | ±1% of the specified outside diameter |
AISI 4130 Pipes Stock Range
| AISI 4130 Chromoly Pipe Stock Range | AISI 4130 Chromoly Pipe Stock Range |
|---|---|
| ASTM A519 Grade 4130 Seamless Tubes | AISI 4130 Precision Tubes |
| ASTM A519 Grade 4130 Mechanical Tubes | AISI 4130 Honed Tubes |
| ASTM A519 AISI 4130 Pipes | AISI 4130 DOM Tubes (Drawn Over Mandrel) |
| AISI 4130 Seamless Pipes | AISI 4130 Chromoly Pipes |
| AISI 4130 ERW Pipes | Chromium Molybdenum 4130 Pipes |
| AISI 4130 Welded Pipes | Alloy Steel 4130 Pipes |
| AISI 4130 Hydraulic Tubes | Alloy Steel 4130 Seamless Pipes |
| AISI 4130 Round Tubes | Large Diameter AISI 4130 Pipes |
| AISI 4130 Square Tubes | AISI 4130 Schedule 40 Pipes |
| AISI 4130 Rectangular Tubes | AISI 4130 Schedule 80 Pipes |
| AISI 4130 Oval Tubes | Custom Size AISI 4130 Pipes |
| ASTM SA519 Grade 4130 Round Tubes | AISI 4130 Industrial Pipes |
| ASTM A519 Grade 4130 Cold Drawn Tubes | ASTM A519 / ASME SA519 Grade 4130 Tubes |
Chromoly 4130 Price
The price of AISI 4130 Chromoly (Chrome Moly) steel varies depending on the product form (pipe, tube, bar, plate), dimensions, quantity, and whether it is seamless or welded.
| Product | Approximate Price (India) |
|---|---|
| 4130 Pipes & Tubes | ₹250 – ₹350 per kg |
| 4130 Round Bars | ₹180 – ₹350 per kg |
| 4130 Plates | ₹180 – ₹320 per kg |
4130 Chromoly Pipe Types
AISI 4130 Pipe
A519 Gr 4130 Pipes
ASTM A519 Gr 4130 Seamless Pipes
4130 Chromoly Pipes
4130 Material Pipes
4130 Tubing
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FAQ’s About 4130 Chromoly Tubing
What is chromoly 4130?
Chromoly 4130 is a low-alloy steel containing chromium and molybdenum, which provide excellent strength, toughness, and wear resistance. It is widely used for pipes, tubes, aircraft components, motorsports, and structural applications.
What is 4130 grade material?
4130 grade material is a chromium-molybdenum alloy steel with approximately 0.30% carbon content. It offers a good balance of weldability, machinability, and high strength, making it suitable for pressure piping and mechanical components.
Which is stronger, 4130 or 4140?
AISI 4140 is generally stronger and harder than AISI 4130 because it contains more carbon. However, AISI 4130 provides better weldability and is often preferred for applications requiring high strength with easier fabrication.
Is chromoly a high carbon steel?
No, chromoly 4130 is not a high carbon steel. It is a low-alloy steel with a medium carbon content of approximately 0.28–0.33%, enhanced by chromium and molybdenum for improved strength and corrosion resistance.
