TORICH INTERNATIONAL LIMITED
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
| Supply Ability | 60000 Ton/Tons per Year |
| Delivery Time | 20-30days upon products |
| Packaging Details | In bundles or in wooden boxes. |
| Application | Mechanical |
| Outer diameter | 20 - 426 mm |
| Thickness | 2 - 100 mm |
| Technique | Cold Drawn,Hot Rolled,Cold Rolled,ERW,Hot Rolled/Cold Drawn |
| Section shape | Round,Rectangular |
| Special pipe | Thick Wall Pipe,API Pipe,Precision steel tube,precision seamless pipe |
| Grade group | 42CrMo (GB) 42CrMo4 (EN 1.7225) AISI/SAE 4140(A519) JIS SCM440 GOST 40X(40Kh) |
| Length | 6M or as requirement,As customer's require,8m,5.8m,2.5-8m |
| Brand Name | 1Ton |
| Model Number | Precision Seamless Steel Pipe |
| 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,MoneyGram | Supply Ability | 60000 Ton/Tons per Year |
| Delivery Time | 20-30days upon products | Packaging Details | In bundles or in wooden boxes. |
| Application | Mechanical | Outer diameter | 20 - 426 mm |
| Thickness | 2 - 100 mm | Technique | Cold Drawn,Hot Rolled,Cold Rolled,ERW,Hot Rolled/Cold Drawn |
| Section shape | Round,Rectangular | Special pipe | Thick Wall Pipe,API Pipe,Precision steel tube,precision seamless pipe |
| Grade group | 42CrMo (GB) 42CrMo4 (EN 1.7225) AISI/SAE 4140(A519) JIS SCM440 GOST 40X(40Kh) | Length | 6M or as requirement,As customer's require,8m,5.8m,2.5-8m |
| Brand Name | 1Ton | Model Number | Precision Seamless Steel Pipe |
| Certification | ISO9001 ISO 14001 TS16949 | Place of Origin | Zhejiang/China |
| High Light | 42CrMo Alloy Steel Precision Seamless Steel Pipe ，High-Strength Low-Alloy Precision Steel Tube ，Cold Drawn Precision Mechanical Tubing | ||
42CrMo is a Cr-Mo alloy steel per GB/T 3077, commonly quenched and tempered for high strength, toughness, and fatigue resistance. Used as precision seamless tubing, it offers tight dimensional control and clean internal surfaces suitable for machining, honing, and high-load mechanical service.
Standards for precision/mechanical tube:
GB/T 3639 (seamless cold-drawn/rolled precision tubes), EN 10305-1 (seamless cold-drawn precision tubes), EN 10297-1 (seamless tubes for mechanical and general engineering), ASTM A519 (seamless carbon and alloy mechanical tubing).
Typical size envelope:
OD up to 323.8 mm under ASTM A519; EN 10305-1 allows OD ≤ 380 mm. Lengths per order.
Delivery conditions: +A (annealed), +SR (stress relieved), +QT (quenched & tempered), +N (normalized), as specified.
Precision attributes: EN 10305-1 defines tight OD/WT tolerances and maximum surface roughness requirements for precision applications. ASTM A519 provides detailed OD tolerances; hot-finished tolerance examples include ±0.020″ up to 3″ OD, scaling with size.
High tensile and yield strength with good impact toughness after Q&T.
Good hardenability and stability across section sizes (42CrMo family).
Manufactured to precision tubing standards for concentricity, straightness, and controlled roughness.
Tight tolerances & finish for ready-to-machine parts
We supply per EN 10305-1 precision limits (tight OD/WT tolerances and specified Ra caps) and ASTM A519 tolerance classes, reducing pre-machining allowance and scrap.
Verified mechanical properties in the delivered condition
When ordered +QT, we target the 42CrMo/42CrMo4 property window (e.g., ≥930 MPa YS, ≥1080 MPa UTS at reference size; EN 42CrMo4 +QT ranges by diameter). Each lot ships with EN 10204 3.1 MTRs.
Broad standards coverage and cross-grade expertise
We can certify to GB/T 3639, EN 10305-1, EN 10297-1, and ASTM A519, and we help select equivalents such as 42CrMo4 (EN 1.7225), AISI/SAE 4140, or JIS SCM440 to meet your print.
Size range that fits real projects
We cover mechanical tube sizes up to 12 ¾″ (323.8 mm) under ASTM A519 and up to 380 mm OD under EN 10305-1, with custom lengths and heat treatments.
NDT & quality controls for reliability
Precision tube standards call out leak-tightness verification/EM testing and mechanical tests (tension, hardness, flaring) as applicable; we align our QA plan accordingly.
| Grade / Standard | C | Si | Mn | P (max) | S (max) | Cr | Mo |
|---|---|---|---|---|---|---|---|
| 42CrMo (GB/T 3077) | 0.38–0.45 | 0.17–0.37 | 0.50–0.80 | 0.030 | 0.030 | 0.90–1.20 | 0.15–0.25 |
| 42CrMo4 (EN 1.7225) | 0.38–0.45 | ≤0.40 | 0.60–0.90 | 0.025 | 0.035 | 0.90–1.20 | 0.15–0.30 |
| AISI/SAE 4140 (SAE J404 / A519) | 0.38–0.43 | 0.15–0.35 | 0.75–1.00 | 0.04 | 0.04 | 0.80–1.10 | 0.15–0.25 |
| JIS SCM440 (JIS G4053) | 0.38–0.43 | 0.15–0.35 | 0.60–0.90 | 0.03 | 0.03 | 0.90–1.20 | 0.15–0.30 |
| GOST 40X (40Kh) close analogue | 0.36–0.44 | 0.17–0.37 | 0.50–0.80 | 0.035 | 0.035 | 0.80–1.10 | — |
| Grade | Typical YS (MPa) | Typical UTS (MPa) | Elongation (%) |
|---|---|---|---|
| 42CrMo (GB) | ≥930 | ≥1080 | ≥12 |
| 42CrMo4 (EN 1.7225) | 900 (≤16 mm) | 1100–1300 (≤16 mm) | 10–14 (rounds, +QT) |
| AISI/SAE 4140 (A519) | 690–690 (SR/N) to 690+ | 825–855 (SR/N) to 855+ | 10–25 |
| JIS SCM440 | 350–550 (range shown) | 650–880 | 8–25 |
| GOST 40X (40Kh) | ≥785 | ≥980 | ≥10 |
GB (China): GB/T 3077 (42CrMo steel); GB/T 3639 for precision cold-drawn/cold-rolled seamless tubes.
EN (Europe): EN 10305-1 (precision seamless cold-drawn tubes); EN 10297-1 (seamless tubes for mech/general engineering); EN 10083-3 (42CrMo4 steel for Q&T).
ASTM/ASME (US): ASTM A519 / ASME SA519 (seamless carbon/alloy mechanical tubing).
JIS (Japan): JIS G4053 (SCM440, low-alloy steels for machine structural use).
GOST (Russia): GOST 8734-75 (cold-formed/precision seamless tubes, dimensions & tolerances) and GOST 4543 (structural alloy steels, incl. 40X family).
General scope: automotive, powertrain, heavy machinery, mining, hydraulic systems, oilfield tools, gear/shaft components.
Typical uses in each field:
Automotive & off-highway: drive/axle shafts, steering knuckles, cylinder tubes (EN 10305-1 precision). Industrial hydraulics: honed cylinder barrels, piston rods (precision ID/OD). Energy & oilfield: drill-pipe tool joints, couplings. Gear trains: large gears, pinions, crankshafts requiring Q&T strength.
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
A Professional Steel Pipes Materials Inventor, Manufacturer And Solution Provider TORICH INTERNATIONAL LIMITED is a professional inventor, manufacturer, and solution provider of steel pipe materials, integrating production and international trade, specializing in various precision steel pipes. Esta... A Professional Steel Pipes Materials Inventor, Manufacturer And Solution Provider TORICH INTERNATIONAL LIMITED is a professional inventor, manufacturer, and solution provider of steel pipe materials, integrating production and international trade, specializing in various precision steel pipes. Esta...
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