TORICH INTERNATIONAL LIMITED
| Payment Terms | L/C,D/A,D/P,T/T,Western Union, |
| Supply Ability | 60000 Ton/Tons per Year |
| Delivery Time | 20-30days upon products |
| Packaging Details | In bundles or in wooden boxes. |
| Application | Structure Pipe,Hydraulic Pipe,Construction,Fluid Pipe,Oil Pipe |
| Outer diameter | 1- 200 mm |
| Thickness | 1 - 20 mm |
| Standard | ASTM,DIN,GB,JIS,API |
| Technique | Cold Drawn,Hot Rolled,Cold Rolled,ERW,Hot Rolled/Cold Drawn |
| Section shape | Round,Rectangular |
| Length | 6M or as requirement,As customer's require, |
| Steel grade | 4340 4140 4130 4145 42CrMo4 |
| Material | Alloy Steel |
| Brand Name | TORICH |
| Model Number | 4340 |
| Certification | ISO9001 ISO 14001 TS16949 |
| Place of Origin | Zhejiang/China |
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Product Specification
| Payment Terms | L/C,D/A,D/P,T/T,Western Union, | Supply Ability | 60000 Ton/Tons per Year |
| Delivery Time | 20-30days upon products | Packaging Details | In bundles or in wooden boxes. |
| Application | Structure Pipe,Hydraulic Pipe,Construction,Fluid Pipe,Oil Pipe | Outer diameter | 1- 200 mm |
| Thickness | 1 - 20 mm | Standard | ASTM,DIN,GB,JIS,API |
| Technique | Cold Drawn,Hot Rolled,Cold Rolled,ERW,Hot Rolled/Cold Drawn | Section shape | Round,Rectangular |
| Length | 6M or as requirement,As customer's require, | Steel grade | 4340 4140 4130 4145 42CrMo4 |
| Material | Alloy Steel | Brand Name | TORICH |
| Model Number | 4340 | Certification | ISO9001 ISO 14001 TS16949 |
| Place of Origin | Zhejiang/China | ||
| High Light | 4340 chromoly alloy steel tubing ，seamless round tube high temperature ，chromoly steel pipe for service | ||
AISI 4340 seamless chromoly tubing is a medium-carbon, low-alloy steel tube engineered for elevated-temperature applications, offering exceptional strength, toughness, fatigue resistance, and wear properties. It is manufactured by cold drawing or hot pilgering processes to tight tolerances, yielding a smooth surface finish and uniform mechanical properties. Typical dimensions range from 10 mm to 200 mm outer diameter with wall thicknesses of 1 mm to 20 mm, accommodating a broad spectrum of hydraulic, aerospace, oil-and-gas, and mechanical applications. The tubing meets key delivery conditions under ASTM A519, EN 10216-2, JIS G3445, GB/T 8162, and GOST 8732-78 standards, ensuring compatibility with global engineering specifications.
AISI 4340 is an ultra-high strength chromoly alloy steel containing nickel, chromium, molybdenum, manganese, and silicon, with a carbon content of 0.38 – 0.43 wt %. Its alloying promotes a fine martensitic microstructure upon quenching and tempering, resulting in yield strengths from 740 MPa up to 1860 MPa and tensile strengths of 860 – 1980 MPa, depending on heat treatment. This composition delivers a hardness range of HRC 24 – 53, excellent creep resistance, and superior crack-arrest toughness at elevated temperatures.
Outer Diameter (OD): 10 mm – 200 mm
Wall Thickness (WT): 1 mm – 20 mm
Lengths: Cut to customer requirements (up to 6 m)
Tolerance: ±0.1 mm OD, ±0.05 mm WT per ASTM A519 precise tubing tolerance
| Grade | C (wt %) | Si (wt %) | Mn (wt %) | P (max %) | S (max %) | Cr (wt %) | Mo (wt %) | Ni (wt %) |
|---|---|---|---|---|---|---|---|---|
| 4340 | 0.38 – 0.43 | 0.15 – 0.35 | 0.65 – 0.90 | ≤ 0.010 | ≤ 0.010 | 0.70 – 0.90 | 0.20 – 0.30 | 1.65 – 2.00 |
| 4140 | 0.38 – 0.43 | 0.15 – 0.30 | 0.75 – 1.00 | ≤ 0.035 | ≤ 0.040 | 0.80 – 1.10 | 0.15 – 0.25 | – |
| 4130 | 0.28 – 0.33 | 0.15 – 0.35 | 0.40 – 0.60 | ≤ 0.035 | ≤ 0.040 | 0.80 – 1.10 | 0.15 – 0.25 | – |
| 4145 | 0.43 – 0.48 | 0.15 – 0.35 | 0.75 – 1.00 | ≤ 0.035 | ≤ 0.040 | 0.80 – 1.10 | 0.15 – 0.25 | – |
| 42CrMo4 | 0.38 – 0.45 | ≤ 0.40 | 0.60 – 0.90 | ≤ 0.025 | ≤ 0.035 | 0.90 – 1.20 | 0.15 – 0.30 | – |
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness |
|---|---|---|---|---|
| 4340 | 860 – 1980 | 740 – 1860 | 11 – 23 | 24 – 53 HRC |
| 4140 | 655 – 950 | 415 | 25.7 | B 92 (197 HB) |
| 4130 | 586 – 690 | 480 | 20 – 30 | HRB 90 – 96 |
| 4145 | 880 – 1020 | 620 | 15 – 25 | – |
| 42CrMo4 | 900 – 1200 | 650 – 750 | 11 – 12 | 270 – 350 HB |
High Strength & Toughness: Exceptional tensile and yield strengths with good ductility for safety under dynamic loading.
Elevated-Temperature Performance: Maintains mechanical integrity up to 600 °C in tempered conditions.
Fatigue & Creep Resistance: Ideal for cyclic and sustained-load service in hydraulic, aerospace, and pressure-vessel components.
Wear & Impact Resistance: Hardenable surface layer provides abrasion resistance while core retains toughness.
Precision & Finish: Cold-drawn surface finish with concentricity and roundness tolerances suited for high-precision assemblies.
ASTM A519: Seamless carbon and alloy steel mechanical tubing
EN 10216-2: Seamless steel tubes for pressure purposes – alloy steels with specified elevated-temperature properties
JIS G3445 / G4105: Alloy steel tubes for general structural and mechanical purposes
GB/T 8162: Seamless carbon and alloy steel tubes for general structural purpose
GOST 8732-78: Seamless steel pipes for general purposes
Aerospace & Defense
Oil & Gas Exploration
Automotive & Heavy Machinery
Hydraulic & Pneumatic Systems
Power Generation & Pressure Vessels
Hydraulic Cylinder Rods & Shafts: High fatigue life under cycling loads.
Aircraft Landing Gear & Fasteners: Demanding toughness at sub-zero and elevated temperatures.
Crankshafts & Gears: Superior wear resistance and surface hardenability.
Oilfield Drill Collars & Tubing: Sustained load capacity and corrosion resistance in downhole environments.
Pressure Vessel Components: Reliable performance under pressure and thermal cycling.
A: manufacturer,also can do trading.
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,
it is according to quantity.
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller
Year Established:
1997
Total Annual:
25000000-30000000
Employee Number:
100~200
Ecer Certification：
Verified Supplier
Company Overview A Professional Steel Tube Manufacturer and Solution Provider TORICH INTERNATIONAL LIMITED integrates steel tube manufacturing, international trade, warehousing, technical support and customized processing. Our manufacturing operations cover cold drawing, cold rolling, heat treat... Company Overview A Professional Steel Tube Manufacturer and Solution Provider TORICH INTERNATIONAL LIMITED integrates steel tube manufacturing, international trade, warehousing, technical support and customized processing. Our manufacturing operations cover cold drawing, cold rolling, heat treat...
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