E355 seamless cold drawn steel tubes Description
E355 cold-drawn precision tubes are a high-performance steel tube material, produced in accordance with the European standard EN 10305-1, which is commonly used for mechanical and general engineering applications. The tubes are cold-drawn or hot-rolled to provide high precision and excellent mechanical properties.E355 is equivalent to the German standard ST52 or the Chinese national standard Q345, which represents a specific steel type commonly used in the automotive, machinery manufacturing, nuclear power and other industries. Delivery states of steel tubes can include normalised (+N), annealed (+A), cold-drawn hard (+C), cold-drawn soft (+LC) and stress relieved (+SR).
E355 Seamless Precision Steel Tube Specification
| Product Name |
EN10305 E355 Hydraulic Steel Tube |
| Material | |
|
Delivery Condition |
BK, BK+S, GBK, NBK |
|
Straightness: |
≤ 0.5/1000 |
|
Thickness |
5-60mm |
| Diameter | 30mm - 1000mm |
| Length | As per request |
| Shape | Round Pipe/Tube |
| Process | cold drawn/cold rolled/Hot drawn/Hot rolled |
|
Protection: |
anti-rust oil on inside and outside surface, plastic caps in both ends. |
| Used | high pressure gas cylinder tube |
|
Packing: |
bundle with steel strip and PE sheet package or wooden case. |
E355 Chemical composition (%)
| composition | C | Si | Mn | P | S | Al |
|---|---|---|---|---|---|---|
| Min | - | - | - | - | - | 0.02 |
| Max | 0.22 | 0.55 | 1.6 | 0.025 | 0.025 | - |
E355 Mechanical properties
| Terms | Marking | Heat treatment or condition | tensile strength σb Mpa |
yield point σs Mpa |
Elongation at break or elongation δ % |
|---|---|---|---|---|---|
| Seamless Tube | E355 +N | normalizing(+N) | 490~630 | ⓐ ≥355 |
≥22 |
| Seamless Tube | E355 +SR | Cold drawing and stress relief(+SR) | ≥580 | ⓑ ≥450 |
≥10 |
| Seamless Tube | E355 +A | Softening annealing(+A)** | ≥450 | ≥22 | |
| Seamless Tube | E355 +LC | Cold annealing(+LC)* | ≥580 | ≥7 | |
| Seamless Tube | E355 +C | Cold drawing hardening(+C)* | ≥640 | ≥4 |
E355 standard equivalence table
| GB | ASTM | ISO | DIN EN/DIN | W-Nr. | NF EN/NF | EN | 数字牌号 | GOST | SS | BS EN/BS |
| Q390C | Gr.65 | Fe590 | E355 St52 St52-3 |
1.0060 | E335 ES355 TS-47a TU526 |
E355 | 1.0580 | St6sp | 1650 | CEW5 CFS5 E335 ERW5NKM ERW5NZF |
E355 cold-drawn seamless pipe
FAQ
Q: Are you a trading company or a manufacturer?
A: We are a steel factory established in 2008, with a much longer history than other suppliers. Our factory is ISO, EN, API certified and is capable of producing a wide range of steel pipes and fittings.
Q: How long is your delivery time?
A: If it is in stock, it is generally 5-10 days. If it is not in stock, it is 15-20 days, depending on the quantity.
Q: Do you provide samples? Is it free or do you need to pay extra?
A: Yes, we can provide samples for free, but we don't pay for the shipping.
Q: What are your payment terms?
A: Payment <= $1000, 100% prepaid. Payment >= $1000, 30% prepaid T/T, the balance paid before shipment.
Q: What is the minimum order?
A: 30 tons, since we are a factory, the cost of small orders is relatively high, we prefer orders above 30 tons.
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