Precision ERW Carbon Steel Pipe with 20-426mm Outer Diameter 0.4-100mm Thickness and 1-12m Length for Automotive Applications
Rincian produk
20-426mm Outer Diameter ERW Carbon Steel Pipe
,0.4-100mm Thickness Precision Steel Tube
,1-12m Length Welded Steel Tube
STKM11A ERW Carbon Steel Welded Pipe Precision Automotive Steel Tube
Material
Electric-Resistance Welded (ERW) low-carbon steel tubing manufactured to JIS G3445 STKM11A and supplied as precision, cold-sized round tubes for automotive and machinery applications. Typical forming includes bending, flaring, flanging and flattening with consistent surface and weld integrity per precision-tube standards.
Specifications
-
Process: ERW (high-frequency), cold sizing; optional annealed (+A) or normalized (+N) after sizing.
-
Supply conditions: +CR1 / +CR2 (as-welded & cold-sized), +A (soft annealed), +N (normalized) to match downstream forming needs.
-
Standards typically matched: JIS G3445 (STKM series), EN 10305-3 (E-grades), ASTM A513 (Types 1/2 mechanical tubing), GB/T 13793 (ERW steel pipe).
Key Features
-
Automotive-grade precision: Tight OD/WT tolerances and specified maximum surface roughness per EN 10305-3 for precision tubes.
-
Formability & weldability: Low carbon (C ≤0.12%) and Mn ≤0.60% promote easy bending and flaring with stable weldability.
-
Consistent weld seam quality: Flash-in/flash-out control available; internal flash controlled to ≤0.005 in (≈0.13 mm) when specified.
-
Verified straightness: Meets typical ASTM A513 straightness criteria 1/32 in per 3 ft (~0.8 mm/m); tighter options available by agreement.
-
Optional heat treatment windows: +A for maximum ductility; +N for balanced strength/ductility; +CR1/+CR2 when higher as-welded strength is desired.
Chemical Composition
| Grade / Standard | C | Si | Mn | P | S | Al (min) |
|---|---|---|---|---|---|---|
| STKM11A (JIS G3445) | ≤0.12 | ≤0.35 | ≤0.60 | ≤0.040 | ≤0.040 | — |
| E155 (EN 10305-3) | ≤0.11 | ≤0.35 | ≤0.70 | ≤0.025 | ≤0.025 | ≥0.015 |
| E190 (EN 10305-3) | ≤0.10 | ≤0.35 | ≤0.70 | ≤0.025 | ≤0.025 | ≥0.015 |
| E195 (EN 10305-3) | ≤0.15 | ≤0.35 | ≤0.70 | ≤0.025 | ≤0.025 | — |
| 1010 (ASTM A513 ref.) | 0.08–0.13 | — | 0.30–0.60 | ≤0.035 | ≤0.035 | — |
Mechanical Properties
| Grade | Condition | Yield (MPa) | Tensile (MPa) | Elongation (%) |
|---|---|---|---|---|
| STKM11A (JIS) | As specified for tubes | — | ≥290 | ≥35 (L); ≥30 (T) |
| E155 (EN 10305-3) | +N | ≥155 (ReH) | 270–410 | ≥28 |
| E190 (EN 10305-3) | +CR2 | ≥190 (ReH) | ≥270 | ≥26 |
| E195 (EN 10305-3) | +N (typical) | ≥195 (ReH) | ~320–510 | ≥28 (typical) |
| STKM12A (JIS) | Tubes | ≥175 | ≥340 | ≥35 (L); ≥30 (T) |
Governing Standards
-
JIS: JIS G3445 (STKM11A/12A/12C) carbon steel tubes for machine structure.
-
EN: EN 10305-3 (E155/E190/E195) welded, cold-sized precision tubes; precision tolerances and surface roughness defined; typical field—automotive.
-
ASTM/ASME: ASTM/ASME A513 (Types 1 & 2) ERW carbon steel mechanical tubing with specific OD/WT/straightness tolerances; flash control options.
-
GB (China): GB/T 13793 ERW steel pipe (general); precision applications often align with EN 10305-3 requirements on request.
-
GOST (Russia): GOST 10705/10704 welded steel pipes (general-purpose baselines) used for referencing dimensional tolerances in CIS markets.
Application Fields
General: Automotive, machinery, furniture, appliances, bicycles, and general engineering precision tubing.
Automotive examples (where it is used within the system):
-
Chassis & body: seat structures, cross-members, crash-bracing.
-
Steering & suspension: steering columns/shafts, shock absorber shells, stabilizer bar sleeves.
-
Powertrain & fuel: fuel rails, EV battery pack frames, coolant lines (with post-coating).
-
Interior mechanisms: slider rails, hinge arms.
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 shippment.
If you have another question, pls feel free to contact with me.
-
Auto Parts ASTM A513 Cold Rolling Tabung Baja Dilas dengan Produksi DOM
Bagian Otomotif ASTM A513 tabung baja las dengan produksi DOM ASTM A513 Tabung mekanik karbon dan baja paduan yang dilas dengan resistensi listrik Aplikasi: untuk Mesin, Teknik Mesin 1Standar:ASTM A513 tabung baja presisi las bergelombang dingin 2Kelas baja:SAE1010, SAE1020, bahan lain setelah ... -
25mm Diameter Bright Annealing Tabung Baja Mulus untuk Sistem Hidrolik
EN10305-1 E235 E355 NBK Pipa baja presisi pemutih terang untuk sistem hidrolik EN10305-1 NBK pipa baja presisi Bright Annealed untuk sistem hidrolik OD:4-80 (mm) WT0.5-10 (mm) Panjang 1000-12000mm Nama produk: Pipa Baja Precision Seamless Aplikasi: untuk sistem hidrolik pipa baja presisi untuk ... -
Tabung Baja Hitam Fosfat Seamless Presisi untuk Sistem Hidraulik
Pipa baja dengan presisi tinggi untuk sistem hidrolik dengan permukaan Phosphating Hitam Tabung hidraulik fosfat hitam dengan presisi tinggi dan toleransi yang ketat, tabung diproduksi oleh presisi dingin ditarik dan rolling dingin, kemudian terang annealed dalam atmosfer yang dilindungi,Setelah itu ... -
Tabung Baja Galvanis Mulus Presisi DIN2391 EN103052 ST35.0 ST37
Precision Seamless Galvanized Steel Tubes DIN2391 EN103052 ST35.0 ST37 Proses Produksi: Gelas dingin oleh mesin Cold pilger dan mesin Cold rolling,galvanized dan zinc plated dapat diterapkan. Pipa baja yang digulung dingin dan galvanis Proses produksi:Tabung baja tanpa jahitan DIN yang sangat akurat...
