| Type: | Seamless |
|---|---|
| Technique: | Cold Drawn |
| Material: | Carbon Steel |
| Surface Treatment: | Black |
| Usage: | Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose |
| Section Shape: | Round |
| Samples: |
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| Customization: |
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ASTM 5120 GB 20CrMnTi is a carburized steel with good properties, high hardenability, and hard and wear-resistant surface and tough core after carburizing and quenching. The carburized steel is usually a low carbon steel with a carbon content of 0.17% - 0.24%. Transmission gears are mostly made of it in automobiles. It is medium hardenable carburized steel and medium Cr Mn Ti steel. Its hardenability is high. Under the condition of ensuring hardenability, it has high impact toughness at low temperature. 20CrMnTi steel for surface carburizing and hardening treatment. Good workability, small machining deformation and good fatigue resistance. The main uses are: for shafts, piston parts and various special parts of automobiles and airplanes.
|
Material
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Ni
|
Cu
|
|
ASTM 5120 GB 20CrMnTi
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0.17-0.23
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0.17-0.37
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0.80-1.10
|
0.030
|
.0.030
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1.00-1.30
|
0.30
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0.30
|
|
Thickness (diameter, side length)
t mm |
Tensile strength
σb Mpa |
Yield point
σs Mpa |
elongation
δ5 % |
hardness
HBW |
Impact toughness value α kv (J/cm2)
|
Impact energy Akv (J)
|
|
t=15
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≥1080(110)
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≥835(85)
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≥10
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≤217HB
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≥69(7)
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≥55
|
Allowable adjustment range of heat treatment temperature: quenching ± 15 ° C, low temperature tempering ± 20 ° C, high temperature tempering ± 50 ° C
The mechanical properties listed in the table are applicable to the steel with a section size of no more than 80mm. For steel with size greater than 80 to 100 mm, the elongation after fracture, reduction of area and impact absorption energy are allowed to be reduced by 1% (absolute value), 5% (absolute value) and 5% respectively compared with those specified in the table; For steel with size greater than 100 to 150 mm, the elongation after fracture, reduction of area and impact absorption energy are allowed to be reduced by 2% (absolute value), 10% (absolute value) and 10% respectively compared with those specified in the table; For steel with size greater than 150 to 250 mm, the elongation after fracture, reduction of area and impact absorption energy are allowed to be reduced by 3% (absolute value), 15% (absolute value) and 15% respectively compared with those specified in the table;
Boron steel can be normalized before quenching, and the normalizing temperature should not be higher than its quenching temperature. The first quenching of chromium-manganese titanium steel can be replaced by normalizing
During tensile test, no yield can be found on the sample steel and the yield point cannot be measured σ S, the specified residual elongation stress can be measured σ< sub> τ 0.2
The hardness in the table is the value of Brinell hardness HB10/3000 in the steel annealing or high-temperature tempering supply state Heat treatment system: The first quenching heating temperature is 880 ° C, the second quenching heating temperature is 870 ° C, oil cooling; Tempering temperature 200 ° C, water and air cooling.
Generally, the import volume of seamless pipe is large. The main importing countries are Germany and Japan. European countries such as Romania, Russia, Switzerland, France, Spain, the Czech Republic, Yugoslavia, Hungary and other countries have imported. There are also a small amount of imports from Argentina, Mexico and other countries in South America.
According to the different requirements of the consumer in China, there are more than 100 types of imported seamless pipes, including 15922mm, 1595mm and 15918mm. 114.38mm,114.310mm,114.313mm. The length is generally 5-8m or 4-7m. Mainly hot-rolled carbon structure and ST65. The minimum diameter of the inlet specification is 305 mm, and the maximum diameter is 47813 mm.
A small number of seamless pipes with small diameter and thin wall have been imported from France and Spain, such as 183mm, 223mm, 26.93mm, etc. Implement the general rules of Mannesmann Steel Pipe Plant in Germany.
Seamless pipes imported from Hungary and Japan often refer to DIN2448 and DIN1629.
It is a high-performance carburized steel with high hardenability. After carburizing and quenching, it has a hard and wear-resistant surface and a tough core, with high low-temperature impact toughness, moderate weldability, and good machinability after normalizing. Used for manufacturing important parts with a cross-sectional area of<30mm that withstand high-speed, medium or heavy loads, impacts, and friction, such as gears, gear rings, gear shaft crossheads, etc. It is a substitute steel of 18CrMnTi and is widely used as carburized parts. In the automobile and tractor industries, it is used as an important carburized part with a cross section of less than 30mm, which can withstand high speed, medium or heavy load, impact and friction, such as gear, shaft, gear ring, gear shaft, main shaft of sliding bearing, crosshead, Dog clutch, worm, etc.
Q1:who are we?
A:We are based in Shandong, China, start from 2022,sell to North America(60.00%),Western Europe(14.00%),South America(6.00%).
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