Name: China Precision Seamless Stainless Steel Tube Suppliers, Manufacturers, Factory - Wholesale Price - Torich
Brand: Torich
SKU: 130209431

Products Description

Product Specifications

Standards	ASTM A269
Steel Grades	TP304 TP304L TP304LN TP316 TP316L TP316LN TP317 TP321 TP347 TP348 TPXM10 TPXM11 TPXM15 TPXM19 TPXM29,etc.
Equivalent Standards	EN 10216-5 (1.4301 / 1.4404), DIN 17458, JIS G3447
Outer Diameter (OD)	3mm-120mm
Wall Thickness (WT)	0.5mm-12mm
Length	6/12 m, or customized
Surface Treatment	Bright Annealed (BA), Pickled
Production Process	Cold Drawn
Condition	Solution Annealed, Soft Annealed, Cleaned & Passivated

The inner surface of the Precision Seamless Stainless Steel Tube is relatively smooth with low roughness; this reduces resistance and turbulence during the flow of hydraulic fluid, thereby minimizing pressure loss and enhancing the transmission efficiency of the hydraulic system.

Furthermore, the smooth surface resists the adhesion of impurities and contaminants, helping to maintain the cleanliness of the hydraulic fluid and reducing wear and clogging within hydraulic components, thereby ensuring the proper operation of the system.

Following bright annealing treatment, the tubing is relieved of residual processing stresses and exhibits stable mechanical properties. It is capable of withstanding a rated working pressure of 31.5 MPa to 63 MPa-with a burst pressure of ≥120 MPa-thereby meeting the high-pressure requirements of hydraulic systems in heavy engineering machinery.

Customized Services

We offer customization services for non-standard dimensions, as well as CNC cutting services.
Depending on the client's specific operating conditions, we can provide mechanical polishing (Ra ≤ 0.6 μm ~ 0.2 μm), electropolishing, and similar surface treatments.
We also provide secondary processing services, including chamfering (45°/60°), tapping, swaging, flaring, and tube bending.

Chemical Composition

Element	Carbon	Silicon	Manganese	Phosphorus	Sulfur	Chromium	Nickel	Molybdenum	Nitrogen
TP304L	0.035	1.00	2.00	0.045	0.030	18.0-20.0	8.0-12.0	-	0.10
TP316L	0.035	1.00	2.00	0.045	0.030	16.0-18.0	10.0-14.0	2.00-3.00	0.10
TP321	0.08	1.00	2.00	0.045	0.030	17.0-19.0	9.0-12.0	-	0.10

Mechanical Properties

Property	Tensile Strength	Yield Strength	Elongation	Brinell Hardness	Rockwell Hardness	Impact Toughness (J) ≥ (-20℃)	Rated Working Pressure (MPa)	Burst Pressure (MPa) ≥
TP304L	≥ 485 MPa	170 MPa	≥ 35%	≤ 192 HB	≤ 90 HRB	47	31.5-40	100
TP316L	≥ 485 MPa	170 MPa	≥ 35%	≤ 192 HB	≤ 90 HRB	47	40-63	120
TP321	≥ 515 MPa	205 MPa	≥ 35%	≤192 HB	≤ 90 HRB	47	40-50	110

Possible Alternative Grades

For ultra-high-pressure and highly corrosive operating conditions-such as the high-pressure hydraulic lines found in mining excavators and large-scale cranes-2205 duplex stainless steel is the recommended choice, as it effectively prevents pipe rupture under conditions involving high pressure and vibration.
For high-pressure hydraulic systems in construction machinery that require welding and are subject to moderately corrosive environments, TP316Ti is the preferred option; following welding, its resistance to intergranular corrosion is comparable to that of TP316L.

applications areas

TORICH Precision Seamless Stainless Steel Tubes are manufactured using a precision cold-drawing process and undergo rigorous dimensional inspection. They are widely utilized in the high-pressure hydraulic lines of various types of engineering machinery, including:

Excavators: Main hydraulic lines, boom hydraulic lines, arm hydraulic lines, and swing hydraulic lines.
Cranes (Truck, Crawler, and Tower): Hydraulic luffing lines, telescopic boom hydraulic lines, etc.
Loaders and Scrapers: Boom hydraulic lines, steering hydraulic lines, and lifting hydraulic lines.
Road Rollers and Compactors: Hydraulic travel lines, hydraulic vibration lines, etc.