Products

Q345B – JIS:GGP/STPY41 Carbon Low-alloy Bearing Steel Pipe Krobo Steel

Product Name Carbon Low-alloy Bearing Steel Pipe
Grade Q345B/D/E
Out Diameter 10-1000mm OR customization
Wall Thickness 1-100mm OR customization
Length 1-12m  OR customization
Technique Hot Rolled/Cold Drawn
Standards GB/BS /ASTM
Payment Term T/T or L/C
Price Term CIF; CFR; FOB

Q345B is a steel pipe material. Q stands for the yield of this material, and the following 345 refers to the yield value of this material. Q345B steel pipe is 16Mn steel pipe, which is a kind of seamless steel pipe products.

Q345B steel pipe represents that the carbon content in this steel is about 0.16%. Mn was proposed separately because of the high content of manganese among the five major elements (carbon C, silicon Si, manganese Mn, phosphorus P, and sulfur S). About 1.20-1.60%.

Chemical Composition 

C

Si

Mn

P

S

Ni

Cr

Cu

V

Nb

0.12-0.20

0.20-0.60

1.00-1.60

≤0.040

≤0.040

≤0.30

≤0.30

≤0.20

0.02-0.15

0.015-0.06

Application:

Q345B is a medium and low alloy steel in China’s steel standards, which is often used in construction, bridges, ships, oil tanks, petrochemical equipment, machinery manufacturing, automobile structures, coal mining machinery and other fields. The Q345B seamless steel pipe is a high-strength seamless steel pipe made of Q345B steel.

Q345B seamless steel pipe is widely used in various fields, such as petrochemical, mining, construction, automobile, machinery manufacturing and so on.

Q345B seamless steel pipe is also widely used in various fields. For example, in the petrochemical industry, it can be used to transport chemical liquids, oil and gas, as well as for processing equipment and pipeline systems. In the automotive, construction and machinery industries, Q345B seamless steel tubes are often used to produce various high-strength components, including bearings, machine structures and transmission shafts. In conclusion, due to its various advantages, Q345B seamless steel pipe has found a lot of uses and applications in both industrial and civil fields.

Classification By Size:

The length is generally 6000mm, 1250mm,2200mm,12000mm, and the thickness is distinguished by cold rolling and hot rolling. Cold rolling mainly has thickness 1.0mm, 1.2mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm. The main thickness of hot rolling is 3.0mm, 4.0mm, 6.0mm, 8.0mm, 10.0mm, and the width is generally 1000mm, 1219mm, 1500mm.Please contact customer service for general specifications.

Hot-rolled carbon steel pipe are produced by continuous hot-rolled carbon steel technology with hot-rolled steel strip or cold-rolled steel strip as the substrate. The hot-rolled carbon steel sheet is supplied as a rectangular flat plate by cross-cutting; the hot-rolled carbon steel sheet is supplied in coil form by coiling, and the hot-rolled carbon steel sheet coil can be divided into hot-rolled carbon steel sheet coil and cold-rolled carbon steel sheet Coils, they are mainly used in construction, home appliances, automobiles, containers, transportation and household business and other fields. Especially steel structure construction, automobile manufacturing, steel silo manufacturing and other industries.

Their main features are: strong corrosion resistance, good appearance quality, benefit from deep processing, economical and practical, etc.

Application range:

  • After annealing, it is processed into ordinary cold rolling;

(2) The galvanizing unit with pre-annealing treatment device processes galvanizing;

(3) Panels that basically do not need to be processed.

Why Choose Us?

*Top 20 companies in steel industry trade volume.

*Customized processing steel one-stop purchase.

*Exports of steel exceeded tens of billions for 5 consecutive years.

**We have a complete set of testing equipment, such as ut & ET, hydraulic testing equipment, spectrometer, scanning electron microscope, etc, and have passed SGS TUV

Our Quality Assurance Policy has established guidelines for providing products and services that exceed customer expectations. certified company.

Chemical composition     
CSiMnPSNiCrCuVNb
0.12-0.200.20-0.601.00-1.60≤0.040≤0.040≤0.30≤0.30≤0.200.02-0.150.015-0.06