Q345 alloy steel pipe
(1)Normal size:
sizes | outer diameter(mm) | thickness(mm) | tolerance(mm) | length(m) |
round pipe | 20-273 | 0.3-50 | ±0.3 | 3,6,8,12,etc |
rectangular pipe | 20*30-150*250 | 0.3-12 | ±0.3 | 3,6,8,12,etc |
square pipe | 20*20-200*200 | 0.3-12 | ±0.3 | 3,6,8,12,etc |
Please noted that: Aboved is the normal size, if the size you need is not in there, you can contact me for further information.We can customize the size for you.
(2) Chemical element:
| Grade | C | Si | Mn | P | S | Al |
| Q345A | ≤0.20 | ≤0.50 | ≤1.70 | ≤0.035 | ≤0.035 | Al≥0.015 |
| Q345B | ≤0.20 | ≤0.50 | ≤1.70 | ≤0.035 | ≤0.035 | Al≥0.015 |
| Q345C | ≤0.20 | ≤0.50 | ≤1.70 | ≤0.030 | ≤0.030 | Al≥0.015 |
| Q345D | ≤0.18 | ≤0.50 | ≤1.70 | ≤0.030 | ≤0.025 | Al≥0.015 |
| Q345E | ≤0.18 | ≤0.50 | ≤1.70 | P≤0.025 | ≤0.020 | Al≥0.015 |
| Grade | Ti | Cr | Ni | Mo | Nb | V |
| Q345A | ≤0.20 | ≤0.30 | ≤0.012 | ≤0.10 | ≤0.07 | ≤0.15 |
| Q345B | ≤0.20 | ≤0.30 | ≤0.012 | ≤0.10 | ≤0.07 | ≤0.15 |
| Q345C | ≤0.20 | ≤0.30 | ≤0.012 | ≤0.10 | ≤0.07 | ≤0.15 |
| Q345D | ≤0.20 | ≤0.30 | ≤0.012 | ≤0.10 | ≤0.07 | ≤0.15 |
| Q345E | ≤0.20 | ≤0.30 | ≤0.012 | ≤0.10 | ≤0.07 | ≤0.15 |
(3) Mechanical properties
| Annealing hardness | Cold pull hardness | Preheating temperature | Quenching temperature | Holding time | Hardening medium | Temper temperature | After tempering hardness | |
| HBS | HBS | ℃ | ℃ | min | ℃ | ≥HRC | ||
| salt-bath furnace | controlled atmosphere furnace | |||||||
| 235 | 262 | 788 | 1191 | 1204 | 5~15 | air cooling | 522 | 60 |
(1) For liquid transportation:water supply,water drainage,sewage treatment,engineering,transmission of mud,sea water.
(2) For gas:gas,steam,liquefied petroleum gas.
(3) For structure:piling pipe,bridge,Dock,road,building structure pipe,Marine piling pipe.
(1) Who we are?
Business Purpose
Create value for customers, profit for shareholders,
Future for employees, and prosperity for the society .
Operation Philosophy
Create value for customers, and achieve a win-win situation.
Corporation values
Integrity, innovation, team work and high-quality.
JinGuo Special Steel Co., Ltd is located in Wuxi Jiangsu Province. Our company mainly work on overseas sales business for special steel. Our products have obtained ISO9001:2000 approval certificate, QS-9000 : 1998 (American Vehicle Steel Quality System ) approval certificate, ISO14001:1996 (Environmental Management System) approval certificate and API (American Petroleum Tube Production Quality System) approval certificate. These certificates cover the whole production and service process of all hot-rolled steel products such as structural steel, bearing steel, gearing steel and spring steel etc.
(2) Successful cases
Elkem is a company that produces solar grade silicon, silicon, alloys for the foundry industry, carbon and microsilica. Elkem is owned by China National Bluestar Group Co. Ltd. (Bluestar), which bought the company from Orkla Group for 2 billion USD in 2011. The deal excluded 85 percent of the sister company Elkem Energi AS.
Elkem has four business areas; Silicon Materials, Silicones (BSI), Foundry Products and Carbon.Elkem Carbon is the world’s largest producer of electrically calcined anthracite and electrode paste, which are necessary in the manufacturing process for steel, aluminium , silicon and other metals. There are production plants at Kristiansand (Norway), Shizuishan City (China), Witbank (South Africa) and Vitória (Brazil).
We supplied to Elkem and do the laser cutting,rolling, bending for them.
You can see the pictures belows.
Steel plate
1.Abrasion resistant steel plate
Abrasion Resistant Steel Plate, AR Steel Plate for short, is one of the most versatile wear plate in the world. It is special used for working conditions under large area abrasion. It is made by reinforcing alloy wear layer with suitable thickness, high hardness,good wear property on the surface of the general low-carbon steel or low-alloy steel which has good toughness and plastic property through hardfacing method. Wear resistant (abrasion resistant) steel is widely used in the bad working conditions,demanded of high strength,high-wear-resisting performance in engineering, mining, construction,agriculture,port and metallurgical machinery products.
2.Alloy steel plate
Alloy steel is steelthat is alloyed with a variety of elements in total amounts between 1.0% and 50% by weight to improve its mechanical properties. Alloy steels are broken down into two groups: low-alloy steels and high-alloy steels.Our alloy steel plate include Q195,Q345B,Q345C,Q235C, 40Mn2, etc.
Steel pipe
Steel pipe are classified into 4 types: seamless steel pipe, square steel pipe, welded steel pipe, galvanized steel pipe. Within these categories, customers can select different shapes and over 200 specifications.All the products are manufactured strictly with GB/T6728-2002 and ASTAMA500 and etc. The overall production environment guarantee the total output of products reaches at 1000 thousand tons every year.
Steel bar
Steel bar is widely used in hardware, chemistry, foodstuff, medicine apparatus, making industry, computer or notebook components, etc. Common steel bar grade include Chinese Standard: 20#, 25#, 35#, 45#, 50#, 60#;Japan Standard: S20C, S25C, S35C, S45C, S55C, S60C;US Standard: AISI1020, AISI1040, AISI1045, AISI1050;Europe Standard: CK15, C. 22, C45, CK45, C60, CK60; C45E.
What we can do?
Our factory can produce various kinds of special steel plates,bars,tubes,etc.Including mild steel,medium carbon steel,high-carbon steel,structural alloy steel,wear resistant steel,alloy tool steel,bearing steel,spring steel.
We can also formed or cut the plate,bars and tubes into what you need.
Packing:
1. Packing:
In bundles,in bulk,plastic waterproof package or as your request.
2. Small diameter(measurement<weight):
Length≤5.8m,put in a 1*20FT with 25 tons max.
Length≤11.8m,put in a 1*40FT with 27 tons max.
3. Large diameter(measurement>weight):
5898*2352*2350mm: A 1*20 FT
12024*2352*2395mm: A 1*40 FT
Shipping:
1.Trade terms:CIF,CFR,FOB,EXW,DDU
2.Payment terms:
(1)30% down payment and 70% balance by T/T at sight before shipment.
(2)L/C at sight.
3.Loading port:Shanghai
4.Cooperation ship-owner: MSK, CMA, MSC, HMM, COSCO, UA, NYK, OOCL, HPL, YML, MOL
MOQ:
1.Minimum order quantity: A 1*20FT(usually)
And we surely accept small order such as 1 ton,but the payment terms of the small order is 100% T/T first payment.