1020 DOM Steel Round Tube for Mechanical Applications

Price Negotiable

Price: 800-1000 USD/Ton

MOQ: 1Ton

Delivery Time: 20-30days upon products

Brand: TORICH

Product Description

1020 DOM Tubing Drawn Over Mandrel (DOM) Steel Round Tube For Mechanical

1020 DOM tubing is a cold-drawn, seamless steel tube produced by drawing a hot-finished tube over a mandrel, resulting in precise dimensions, smooth surface finish, and enhanced mechanical properties. Commonly manufactured from low-carbon grades such as AISI 1020, it offers excellent machinability, weldability, and uniform wall thickness, making it ideal for demanding mechanical applications. Key competing grades include AISI 1008, 1018, 1020, 1030, and 1045, each with distinct chemical and mechanical characteristics. DOM tubing typically conforms to standards such as ASTM A519/A513 (USA), EN 10305-1 (EU), GOST 8734-75 (Russia), JIS G3445 (Japan), and GB/T 4161 (China), and is widely used in automotive shafts, hydraulic cylinders, furniture components, and agricultural equipment.

Material

“Drawn Over Mandrel” (DOM) tubing is manufactured by cold drawing a seamless tube over a tight-fitting mandrel, which refines inner and outer diameters, improves surface finish, and enhances mechanical properties through work hardening . The base material is low-carbon steel, commonly AISI 1020, known for its ductility, weldability, and consistent grain structure .

Specifications

Parameter	Typical Range	Source
Outside Diameter (OD)	4 mm – 200 mm	GOST 8734-75 tolerances
Wall Thickness (WT)	1 mm – 20 mm	GOST 8734-75 tolerances
Length	3 m – 6 m	Industry practice
Surface Finish	Ra ≤ 1.6 µm	ASTM A519 requirements
Straightness	≤ 0.5% of length	GOST 8734-75 requirements

Chemical Composition

Grade	C (wt%)	Mn (wt%)	P (≤ wt%)	S (≤ wt%)	Other Highlights
AISI 1008	0.08–0.10	0.40–0.70	0.035	0.035	Si 0.15–0.30; minor Ni, Cr, Cu, Mo
AISI 1018	0.15–0.20	0.60–0.90	0.040	0.050	Fe balance
AISI 1020	0.17–0.23	0.30–0.60	0.040	0.050	Si ≤ 0.35; Cu ≤ 0.40; Ni ≤ 0.40
AISI 1030	0.28–0.34	0.60–0.90	0.025	0.015	Si 0.15–0.35; trace Mo
AISI 1045	0.42–0.50	0.60–0.90	0.040	0.050	Fe balance

Mechanical Performance

Grade	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (HB)
AISI 1008	340	285	20	95
AISI 1018	440	370	15	126
AISI 1020	395	295	36.5	111
AISI 1030	650–880	350–550	8–25	–
AISI 1045	565	310	16	163

Main Characteristics

Dimensional Precision: Tight tolerances (< ± 0.13 mm on OD; ± 0.12 mm on WT) ensure interchangeability .
Enhanced Strength: Cold work increases yield and tensile strength versus hot-finished tubes .
Improved Surface: Smooth, machine-ready finish (Ra ≤ 1.6 µm) reduces post-machining labor .
Excellent Machinability & Weldability: Low-carbon steel matrix supports easy cutting and effective fusion welding .
Uniform Wall Thickness: Mandrel drawing achieves consistent wall thickness with minimal eccentricity .

Execution Standards

ASTM A519: Standard for seamless mechanical tubing, including DOM by cold drawing
ASTM A513: Standard for electric-resistance welded mechanical tubing
EN 10305-1: Cold drawn seamless steel tubes for pressure purposes, precision grade
GOST 8734-75: Cold-formed seamless steel pipes, defining OD, WT, and mass tolerances
JIS G3445: Cold drawn steel tubes for general mechanical and structural use
GB/T 4161: Cold drawn steel tubes for general engineering purposes (China)

Application Fields

General Field: Mechanical and structural engineering for movable components.

Automotive: Drive shafts, steering components, suspension parts where precision and fatigue strength are critical.
Hydraulics: Cylinder barrels and piston rods in hydraulic equipment requiring smooth bore and high straightness.
Furniture: Chair legs, railing spindles, connectors demanding aesthetic finish and uniformity.
Agriculture: Gear shafts, linkage rods, pick-up tubes where durability and machinability are essential.