A513 DOM Carbon Steel Tube — Factory Direct Supplier | Huaxia-Steel

ASTM A513 DOM (Drawn Over Mandrel) tubing is the precision mechanical tube of choice when applications demand uniform walls, smooth ID/OD finishes, and strength beyond as-welded ERW — hydraulic cylinders, shock absorber bodies, steering columns, drive shafts, and machined mechanical components. Produced from electric-resistance-welded mother tube that is cold drawn over a mandrel, DOM tube eliminates the weld bead inside and out, tightens dimensional tolerances to ±0.05 mm ranges, and delivers 15–25% higher strength than the parent weld grade. Huaxia-Steel supplies A513 Type 5 DOM tube from 12.7 mm to 168 mm OD with full EN 10204 3.1 certification and cut-to-length service.

Product Overview

Process: ERW mother tube per A513 Type 5 → annealed → cold drawn over an internal mandrel → stress relieved. The draw pass erases the weld seam geometry and work-hardens the whole wall uniformly.

Size range: OD 12.7–168 mm; wall 1.2–12.7 mm; lengths 3–9 m or cut-to-length ±0.5 mm.

Key advantage: no flash, no seam variation — machinability and honing performance match seamless tube at a 20–40% lower price in most sizes.

Finish: oiled OD, ID rinsed and oiled; phosphated or galvanized on request.

Testing: eddy current 100%, flare/flattening per standard, tensile per heat.

Specification Table

Parameter	Range / Value
Outside diameter	12.7 mm (1/2″) – 168 mm (6.6″)
Wall thickness	1.2 mm – 12.7 mm
OD tolerance	±0.10 mm (≤ 38 mm OD); ±0.13–0.25 mm larger sizes
ID tolerance	±0.25 mm typical after mandrel draw
Wall tolerance	±10% (mandrel-drawn; ±5% on request)
Concentricity	≤ 5% of wall (drawn condition)
Straightness	1 mm/m standard; 0.5 mm/m for precision builds
Lengths	3–9 m random; fixed length ±0.5–3 mm; cut blanks to ±0.1 mm
Weight (theoretical)	W = 0.02466 × t × (D − t) kg/m (t, D in mm)

Available Grades and Mechanical Properties

Grade (A513)	Condition	Tensile min	Yield min	Elongation
1008 / 1010	Cold drawn (DOM)	360 MPa	300 MPa	15%
1015	Cold drawn (DOM)	400 MPa	325 MPa	12%
1020	Cold drawn (DOM)	440 MPa	365 MPa	10%
1021/1026 (heavy wall)	Cold drawn (DOM)	485–520 MPa	400–440 MPa	8–10%
1026 (cylinder grade, common)	DOM + stress relieved	485 MPa	415 MPa	10%

For hydraulic cylinder service, 1026 DOM is the de facto global standard — its chemistry band and drawn properties hold honing tolerances (ID Ra 0.2–0.4 µm achievable after honing) and withstand 250–400 bar working pressures in standard wall/bore combinations. For structural and lighter mechanical use, 1008–1020 grades offer better formability at lower cost. Note that A513 is a mechanical tubing standard: it does not carry pressure-piping certification. For pressure piping, order seamless per ASTM A106/A519 instead.

Manufacturing Standards and Process Control

Mother tube is produced to A513 Type 5 (ERW, cold drawn after) with strip chemistry per SAE J403. After welding, tubes are seam-annealed, then cold drawn over a floating or fixed mandrel in one pass (or two for heavy reductions). Post-draw stress relief at 450–600°C stabilizes dimensions and machinability. Every lot runs 100% eddy-current testing for weld and body defects, plus flattening tests per standard to prove weld ductility. Heat-number traceability runs from strip coil to finished tube and is printed on the EN 10204 3.1 certificate with full ladle analysis.

Applications

Hydraulic and pneumatic cylinder barrels (1026 DOM, honed or SR)

Shock absorber bodies, steering columns, drive shafts

Machined mechanical components: bushings, sleeves, rollers, pins

Furniture frames, exercise equipment, RV and trailer axles

Automotive suspension components and torque rods

Quality Assurance

EN 10204 3.1 MTC per shipment with chemistry, tensile, and test results

100% eddy current + dimensional sampling per A513 Tables

ID/OD surface: no laps, seams, or weld flash — honing-ready on request

Third-party inspection (SGS/BV/TÜV) welcome before shipment

Packaging and Shipping

Bundle in hexagonal packs, steel-strapped, end caps on precision tubes

Plastic sleeve or full-length bagging on honed/cylinder stock

Container-optimized 5.8 m lengths or 20 ft/40 ft bundles; break-bulk for 9–12 m

Kraft-wrapped bundles with heat-number tagging per bundle