SAE J525 ERW/DOM Welded Low-Carbon Steel Tube Annealed for Bending and Flaring in Automotive Industry
Basic Properties
Place of Origin:
China
Brand Name:
TORICH
Certification:
ISO 9001-2008 ISO 14001 EN 10204.3.1 KR LR
Model Number:
SAE J525
Trading Properties
Minimum Order Quantity:
1 TONS
Price:
USD 600-1250 per TON
Payment Terms:
L/C,T/T,D/A,D/P,Western Union
Supply Ability:
60000 Per year
Product Summary
SAE J525 ERW / DOM Welded Steel Tube Low Carbon Annealed For Automotive Industry SAE J525 ERW/DOM Welded Low-Carbon Annealed Steel Tube for Automotive Hydraulic Lines SAE J525 ERW/DOM welded steel tube is a normalized, cold-drawn, single-wall low-carbon steel pressure tube designed for automotive ...
Product Details
Highlight:
welded steel pipe
,electric resistance welded steel tube
Material:
Low-carbon Steel For Welded And Cold-drawn Pressure/mechanical Tubing
Primary Standard:
SAE J525
Recommended Grades:
SAE 1008, SAE 1010, SAE 1012, SAE 1015; SAE 1006 Only When Heat Analysis Also Meets J525 Chemistry
Production Route:
ERW Welded Tube + DOM / Cold Drawing
Outside Diameter:
6–88.9 Mm
Wall Thickness:
1–15 Mm
Length:
1–12 M, Cut-to-length By Purchase Order
Heat Treatment:
Normalized Before Cold Drawing, Then Controlled-atmosphere Annealed / Normalized After Cold Work
Product Description
SAE J525 ERW / DOM Welded Steel Tube Low Carbon Annealed For Automotive Industry
SAE J525 ERW/DOM Welded Low-Carbon Annealed Steel Tube for Automotive Hydraulic Lines
SAE J525 ERW/DOM welded steel tube is a normalized, cold-drawn, single-wall low-carbon steel pressure tube designed for automotive fluid-line parts requiring bending, flaring, forming, and brazing. It is a practical choice when the drawing requires tight OD/ID control, good concentricity, a smooth surface, and lower cost than seamless tubing, while still meeting controlled forming and pressure-line requirements.
SAE J525 is specifically defined for normalized ERW, cold-drawn, single-wall low-carbon pressure tubing; the supplied reference page lists OD 6-88.9 mm, wall thickness 1-15 mm, ERW + DOM production, and annealed delivery condition.
Procurement note: the reference page mentions SAE1010, SAE1020, and SAE1026. For strict SAE J525 procurement, chemistry should be controlled to the SAE J525 limits, typically C ≤0.18, Mn 0.30-0.60, P ≤0.040, and S ≤0.050. SAE 1020 and SAE 1026 are more commonly associated with ASTM A513 Type 5 DOM mechanical tubing and should be quoted as ASTM A513 DOM or as a customer-approved deviation when required.
Specifications
| Item | Specification |
|---|---|
| Material | Low-carbon steel for welded and cold-drawn pressure/mechanical tubing |
| Primary standard | SAE J525 |
| Recommended grades for strict J525 orders | SAE 1008, SAE 1010, SAE 1012, SAE 1015; SAE 1006 only when heat analysis also meets J525 chemistry |
| Production route | ERW welded tube + DOM / cold drawing |
| Outside diameter | 6-88.9 mm |
| Wall thickness | 1-15 mm |
| Length | 1-12 m, cut-to-length by purchase order |
| Dimensional tolerance | OD/ID ±0.05 to ±0.15 mm by diameter group; wall thickness tolerance not more than ±10% |
| Straightness | Recommended order control: ≤1.0 mm/m; tighter straightness to be confirmed by drawing |
| Surface condition | Bright clean OD/ID, oiled; phosphating, zinc plating, or other anti-corrosion finish by agreement |
| Heat treatment | Normalized before cold drawing, then controlled-atmosphere annealed / normalized after cold work |
| Inspection documents | Heat number traceability, dimensional report, mechanical test report, chemical analysis, and EN 10204 3.1 MTC when required |
Main Characteristics
| Characteristic | Technical Detail |
|---|---|
| Controlled low-carbon chemistry | J525 chemistry supports bending and flaring: C ≤0.18, Mn 0.30-0.60, P ≤0.040, S ≤0.050. |
| Annealed forming quality | Minimum elongation is 35% in 50 mm, supporting flare expansion and tight-radius bending. |
| Mechanical acceptance | Yield strength ≥170 MPa, tensile strength ≥310 MPa, Rockwell B hardness ≤65. |
| DOM dimensional stability | Cold drawing over mandrel improves concentricity, roundness, ID/OD tolerance, and wall uniformity compared with as-welded tube. |
| Weld integrity verification | Flattening, reverse-flattening, expansion, hydrostatic, or nondestructive electric testing can be specified according to the applicable J525 edition and purchase order. |
| Cost-performance balance | ERW + DOM construction is generally more cost-effective than seamless tubing where the part design does not require seamless construction. |
Our Advantages
| Professional Buyer Concern | Practical Solution | Result |
|---|---|---|
| Will the tube crack during bending or flaring? | Supply in annealed J525 condition with 35% minimum elongation, controlled low-carbon chemistry, and optional expansion/flare verification. | More stable forming of automotive tube ends and fewer rejected flared parts. |
| Will the ERW seam be reliable in a pressure-line part? | Use ERW + DOM processing with weld normalization, cold drawing, and reverse-flattening or NDT checks when specified. | Better weld-zone consistency and reduced leakage risk in formed fluid-line assemblies. |
| Will dimensions remain consistent after cutting and assembly? | Control OD/ID tolerance by diameter group, wall tolerance within ±10%, straightness by drawing, and full heat traceability with MTC. | More predictable fit-up in brackets, connectors, and tube-end fittings. |
Hydraulic tubing buyers commonly evaluate design pressure, pressure drop, heat generation, flow efficiency, total system cost, and forming behavior. SAE J525 remains a common low-carbon hydraulic tubing standard because it combines ductility with controlled chemistry and cold-drawn dimensional accuracy.
Execution Standards
| Region / Standard System | Standard | Short Description |
|---|---|---|
| SAE | SAE J525 | Welded and cold-drawn low-carbon steel tubing, annealed for bending and flaring; primary standard for this product. |
| ASTM | ASTM A513 Type 5 | ERW carbon/alloy DOM mechanical tubing; suitable when the drawing specifies DOM mechanical tube rather than J525 hydraulic tube. |
| EN | EN 10305-2 / EN 10305-6 | EN 10305-2 covers welded cold-drawn precision tubes; EN 10305-6 covers welded cold-drawn tubes for hydraulic and pneumatic power systems. |
| GOST | GOST 8734 / GOST 8733 / GOST 9567 | Cold-deformed precision tube standards used in Russian/CIS procurement; confirm seamless vs welded requirement before substitution. |
| JIS | JIS G3445 | Carbon steel tubes for machine structural purposes, including automotive and machinery parts. |
| GB | GB/T 31315 | Cold-drawn or cold-rolled precision welded steel tubes for automotive and machinery structures. |
Application Field
Automotive power-steering pressure line tube -- used as a formed and flared tube body in automotive hydraulic steering assemblies where dimensional control, bendability, and tube-end forming quality are required.
Chemical Composition
The following table lists five practical low-carbon SAE grades for J525-type procurement. Final acceptance should follow the latest official standard, the purchase order, and the mill test certificate. SAE J403 and published carbon-steel composition tables show the listed grade ranges; J525 chemistry must still be confirmed by heat analysis.
| SAE Grade | C % | Mn % | P max % | S max % | Procurement Note |
|---|---|---|---|---|---|
| SAE 1006 | ≤0.080 | ≤0.45 / 0.25-0.40 typical | ≤0.030-0.040 | ≤0.035-0.050 | Use only when heat analysis also meets J525 chemistry. |
| SAE 1008 | ≤0.100 | ≤0.50 / 0.30-0.50 typical | ≤0.030-0.040 | ≤0.035-0.050 | Suitable low-carbon forming grade for J525-type tubes. |
| SAE 1010 | 0.080-0.130 | 0.30-0.60 | ≤0.030-0.040 | ≤0.035-0.050 | Commonly used for SAE J525 hydraulic tubing. |
| SAE 1012 | 0.100-0.150 | 0.30-0.60 | ≤0.040 | ≤0.050 | Compatible low-carbon option when specified by drawing. |
| SAE 1015 | 0.130-0.170 / 0.130-0.180 | 0.30-0.60 | ≤0.030-0.040 | ≤0.035-0.050 | Upper end of low-carbon J525-compatible chemistry. |
Mechanical Properties
For SAE J525 orders, mechanical acceptance is normally controlled by the tubing standard and delivery condition, not only by the SAE grade name. The values below apply to J525 annealed / normalized cold-drawn tubing acceptance.
| SAE Grade | Delivery Condition | Yield Strength min | Tensile Strength min | Elongation in 50 mm min | Hardness max |
|---|---|---|---|---|---|
| SAE 1006 | SAE J525 annealed / normalized cold-drawn | 170 MPa | 310 MPa | 35% | HRB 65 |
| SAE 1008 | SAE J525 annealed / normalized cold-drawn | 170 MPa | 310 MPa | 35% | HRB 65 |
| SAE 1010 | SAE J525 annealed / normalized cold-drawn | 170 MPa | 310 MPa | 35% | HRB 65 |
| SAE 1012 | SAE J525 annealed / normalized cold-drawn | 170 MPa | 310 MPa | 35% | HRB 65 |
| SAE 1015 | SAE J525 annealed / normalized cold-drawn | 170 MPa | 310 MPa | 35% | HRB 65 |
Frequently Asked Questions
Q: Are you trading company or manufacturer?
A: manufacturer, also can do trading.
Q: How long is your delivery time?
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.
Q: Do you provide samples? is it free or extra?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment?
A: Payment <=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance, balance before shipment. If you have another question, please feel free to contact with me.
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