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Round steel is a kind of hollow cylindrical metal material, which is widely used in construction, machinery manufacturing, automobile manufacturing, energy, transportation and other industries.
Round steel is mainly made of carbon steel, alloy steel and tool steel.
Among them, carbon steel round steel refers to steel with carbon content within the range of 0.04% to 0.20%.
Carbon steel round steel is an economical and practical structural material with good weldability, plasticity and machinability.
Alloy steel round steel refers to the steel with a certain amount of alloying elements (chromium, manganese, cobalt, boron, molybdenum, vanadium, etc.), which can obtain higher strength, hardness, corrosion resistance and wear resistance.
Tool steel Round steel is a kind of high-speed tool steel material, which has the advantages of high hardness, high red hardness and wear resistance.
The production process of round steel is very diverse, including hot rolling, cold drawing and cold drawing.
Among them, the hot rolling production process refers to the steel material heated to a certain temperature, plastic deformation through rolling machinery and equipment, pressed into different specifications of the shape of steel.
The cold drawing process is the use of steel wire material for cold drawing, which can obtain a higher surface finish for the production of precision parts.
Cold drawing process is to draw steel in cold storage to obtain higher density, hardness and strength.
The wide application of round steel lies in its material characteristics and production process, which can meet the needs of different industries.
In construction projects, round steel is mainly used to build steel structure houses, large factories, Bridges, oil drilling platforms and oil mining equipment.
In the machinery manufacturing industry, round steel is mainly used to process gears, bearings, connecting rods, pins, shafts and other parts.
In the automobile manufacturing industry, round steel is mainly used to make auto parts, frames, suspension systems, guiding mechanisms and so on.
It is also widely used in energy, transportation and other industries.
1).Composition:
| C |
Si |
Mn |
Cr |
Mo |
P |
S |
| 0.38-0.43 |
0.15-0.35 |
0.75-1.00 |
0.8-1.10 |
0.15-0.25 |
<0.035 |
<0.04 |
2). Equivalent Grades :
| GB |
DIN |
ASTM |
JIS |
BS |
NF |
| 42CrMo |
1.7225 |
4140 |
SCM440 |
708M40 |
42CD4 |
3). Diameters:6mm-400mm
Length:3.5m-9m or as required
4). Smelting Process:
EAF+LF+VD
Note:EAF=Electric Arc Furnace; LF=Ladle Furnace; VD=Vacuum Degassing;
5). Properties of 4140 alloy steel:
Special alloy steel, engineering steel supplied in quenched and tempered conditions. Very good machinability. High toughness, creep strength, repeated impact resistance.
6). Application of 4140 alloy steel:
Components with high requirements on toughness, e.g. gear wheels, pinions, connecting rods, parts for mechanical engineering
Application: steel grating, widely used for construction, ship building,
machinery manufacturing, steel structure
Packaging & Delivery:
Packaging detail: Bundle, loose and bare or according customer inquire
Delivery detail: Depend on the customer inquire
TIANJIN GRAND METAL CO. Ltd. is a specialized manufacturer of steel with research-manufacture-distribution system together, developed into a big manufacture and exporter of steel wire and nails.
We have tremendous technical research power, well-appointed production detection device, products with high level and stable quality.
Main products list of our company: all kinds of steel nails, concrete nails and roofing screws, black or hot dipped galvanized wires, galvanized or alu-zinc steel coils/sheets, fibreglass screen, aluminium screen, steel strand etc.
Our products mainly export to Europe, America, Australia, Middle East and South East and Africa with the well comments of the high quality and low price. We sincerely hope to build long term and steady cooperation relationship with the customers of all over the world, to achieve common development.
1.Q:Do you have your own production factory?
A:Yes, we not only have our own factory, also have a cooperative relationship with more than fifty factories in China
2.Q: Can you send us samples?
A: If you need, we are willing to send you the sample to test the quality and market.
3.Q: About your products, could you do it OEM?
A: Yes, OEM service is available.
4.Q: What's the delivery time?
A: It usually takes about 20-30 working days to produce one order.
5.Q: How is the payment terms?
A: Normally T/T 30% in advance and T/T 70% before shipment.
6.Q: Can I mix different models in one container?
A: Yes, different models can be mixed in one container, but the quantity of each model should not be less than MOQ.
7.Q: How does your factory do regarding quality control?
A: We always pay great attention to quality control from the very beginning and every product was tested piece by piece before delivery.
8.Q: Do you have quality certification?
A: Yes, we have CE, SGS, ISO, ect.
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