ST52 / S355JR / E355 Precision Steel Tube, Honing Pipe and Skiving
Pipe for Hydraulic Cylinder, OD: 30-500mm; WT: 2-50mm, Small MOQ
OVERVIEW
EN 10297-1 Grade E355 Carbon Steel Seamless Tubes are also known as mild steel pipes and tubes. EN 10297-1 Grade E355 Tubes are low-cost Low Carbon Steel Tubes with max 022 % carbon content
with combination of max 160 % manganese easy to form and shape
.These pipes are manufactured as per EN Specification and commercially referred as cs pipes or ms pipes. Low Carbon
Steel Pipes are not as hard as high carbon steel pipes, though
carburizing can increase its surface hardness.
EN 10297-1 Grade E355 Specifies the technical delivery conditions
for seamless circular tubes made of non-alloy and alloy steels for
mechanical and general engineering purposes. Pipe will be supplied
in 5-7 metre random lengths with butt-weld ends and varnished to
avoid oxidation of the steel when in storage. All pipes are fully
certified and traceable with heat numbers hard stamped onto each
random length. We can supply cut lengths; long pieces and even bore
from forged, machined bar to satisfy your urgent demand.
APPLICATIONS
Apply to the Precision steel tubes used.
Relavent Standard & Grades Equivalency
-ASTM A519 Seamless Carbon and Alloy Steel Mechanical Tubing
-EN 10297-1 Seamless Circular Steel Tubes for Mechanical and
General Engineering Purpose
-DIN1629 Seamless Circular Tubes of Non-alloy Steels with Special
Quality Requirements
-DIN2391 Seamless Precision Steel Tubes
-JIS G3444 Carbon Steel Tubes for General Structural Purposes
-JIS G3445 Carbon Steel Tubes for Machine Structural Purposes
STANDARD SPECIFICATIONS
| Process | Seamless |
| Shape | Round |
| Size Range | Outer diameter: 30mm -500mm Wall thickness: 2-50mm |
| Pipe End | Plain / Beveled / Vanished / Plastic Caps |
| Coating | Black / Galvanised / 3LPE / Turned / Peeled / Grinded / Polished /
Anti – Corrosion Oil |
| Heat Treatment | Spheroidizing / Full Annealing / Process Annealing / Isothermal
Annealing / Normalizing / Quenching / Martempering (Marquenching) /
Quench And Tempering / Austempering |
| Application | Oil & Gas / Hydro Carbon Process / Automotive / Boiler, Heat
Exchanger / Plumbing, HVAC & Firefighting / Structural / General
Engineering / Railways / Sewage & Waterwell |
| Quality Inspection | Third Party inspection is acceptable (SGS, BV etc.) |
TOLERANCE FOR SEAMLESS TUBING
Honed tubes can be produced according to the demands of costumers
that the degree of precision can reach H8/H9. Burnishing and honing
service can be provided depending on the roughness requirement of
inner diameter.
| Inner diameter | Inner diameter tolerance | Wall thickness tolerance |
| H8 | H9 |
| 30 | +0.033 0 | +0.052 0 | ±5% |
| >30-50 | +0.039 0 | +0.062 0 |
| >50-80 | +0.046 0 | +0.074 0 |
| >80-120 | +0.054 0 | +0.087 0 |
| >120-180 | +0.063 0 | +0.100 0 |
| >180-250 | +0.072 0 | +0.115 0 |
| >250-315 | +0.081 0 | +0.130 0 |
| >315-400 | +0.089 0 | +0.140 0 |
| Processing ways | Diameter | Length | Straightness | Degree of precision | Inner hole roughness |
| Cold rolled | 30-100 | ≤12M | 0.3-1.0 | H8-H10 | 0.4-1.6 |
| Cold drawn | 30-250 | ≤12M | | H8-H10 | 0.8-1.6 |
| Honed | 40-500 | ≤12M | 1000 | H8-H9 | 0.4-0.8 |
| SRB | 40-400 | ≤7M | | H8 | 0.4 |
Chemical Requirements, Composition, %
| Steel Grade | Chemical Components (%) |
| Steel Name | Steel Number | C
max. | Si
max. | Mn
max. | P
max. | S
max. | AL
min. |
| E215 | 1.0212 | 0.10 | 0.05 | 0.7 | 0.025 | 0.025 | 0.025 |
| E235 | 1.0308 | 0.17 | 0.35 | 1.2 | 0.025 | 0.025 | / |
| E355 | 1.058 | 0.22 | 0.55 | 1.6 | 0.025 | 0.025 | / |
DELIVERY CONDITIONS
The tubes shall be manufactured from hot finished seamless tubes by
cold drawing or other suitable processes. The tubes shall be
supplied in one of the delivery conditions as follows:
| Designation | Symbol | Description |
| Cold drawn/hard | +C | No heat treatment after the final cold drawing process. |
| Cold drawn/soft | +LC | After the final heat treatment there is a suitable drawing pass. |
| Cold drawn and stress relieved | +SR | After the final cold drawing process there is a stress relief heat
treatment in a controlled atmosphere. |
| Annealed | +A | After the final cold drawing process the tubes are annealed in a
controlled atmosphere. |
| Normalized | +N | After the final cold drawing operation, the tubes are normalized in
a controlled atmosphere. |
Delivery Condition Symbol in accordance with EN10305 and DIN2391
| Symbol in accordance with EN 10305 | Symbol in accordance with DIN2391 |
| +C | BK |
| +LC | BKW |
| +SR | BKS |
| +A | GBK |
| +N | NBK |
MECHANICAL PROPERTIES
| Mechanical properties at room temperature |
| Steel Grade | Minimum values for the delivery condition |
| Steel Name | Steel Number | +C | +LC | +SR | +A | +N |
Rm
Mpa | A
% | Rm
Mpa | A
% | Rm
Mpa | ReH
Mpa | A
% | Rm
Mpa | A
% | Rm
Mpa | ReH
Mpa | A
% |
| E215 | 1.0212 | 430 | 8 | 380 | 12 | 380 | 280 | 16 | 280 | 30 | 290 to 430 | 25 | 30 |
| E235 | 1.0308 | 480 | 6 | 420 | 10 | 420 | 350 | 16 | 315 | 25 | 340 to 480 | 235 | 25 |
| E355 | 1.0580 | 640 | 4 | 580 | 7 | 580 | 450 | 10 | 450 | 22 | 490 to 630 | 355 | 22 |
Our Services
What we can offer?
-We offer a wide range of steel products in a wide variety of
dimensions and executions, according to the common international
specifications or customize.
-Machining and heat treatment are available.
-Also, we advise you in choosing the right materials.
Quality Assurance
Below inspection will be done in the production.
(1) ray detection---RT;
(2) ultrasonic testing---UT;
(3) Magnetic Particle Testing-MT;
(4) penetration testing-PT;
(5) eddy current flaw detection-ET
Package
In standard export packing and seaworthy material with hexagon shape bundle, covered with tarpaulin, in containers or in bulk, or
upon request
Payment & Delivery
1. Both T/T and L/C will be acceptable
2. Trade Terms: FOB, CIF, CFR
3. The delivery will be in 10-15 days if have stock; For customized
items, the delivery will be negotiated by both parties
4. Shipping by sea freight from Shanghai Port (PRC) for Bulk orders, by airfreight or express for samples
Company Information
Shanghai Unite Steel Trading Co., Ltd
We are committed to integrate engineering steel resources in china
and serve the global engineering steel market. Our company has more
than 15 years of experience in steel researching, production,
managing and sales. And our team mostly are based on and worked in
national famous steel enterprise.
In the aspect of resources and information, we have established
cooperative and stronger relationship with nearly hundred
enterprises, either state-owned or private owned in china.
What’s more, we have built long, deep and close business
relationship with dozens of steel company, Sharing and holding
equities with several steel enterprises. Because of the close
cooperation with steel companies and our pioneering spirit, which
can ensure us stay at the top competition, and ensure our customers
get what they really want!
FAQ
Q: Are you a manufacturer or merely a trader?
A: We are group of companies and owned manufacturer bases and
trading company. We specialized in special steel which include
alloy structural steel and carbon steel and stainless steel, etc.
All material are with high quality and competitive price.
Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party,
such as TUV, CE, if you need. Secondly, we have a complete set of
inspection system and every process is checked by QC. Quality is
the lifeline of enterprise survival.
Q: Delivery time?
A: We have ready stock for most of material grades in our
warehouse. If the material doesn't have stock, the delivery lead
time is about 5-30 days after receiving your prepayment or firm
order.
Q: What is the payment term?
A: T/T or L/C.
Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you
come to China and arrange our driver to our airport to pick you up
when you come.
