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Basic Info.
Model NO.
CRS21
Standard
ASTM A519
Delivery Condition
Bkw, Bks, +LC, +Sr
Steel Grade
4130/4140
Secondary or Not
Non-Secondary
Certificate
ISO 9001 Ts16949
Application
Automotive,Hydraulic System and Precision Device
Transport Package
Box or Bundles
Specification
OD: 5- 250mm ID: 3- 200mm
Trademark
CW
Origin
China
HS Code
7304319000
Product Description
| Standard | Material Chemical Composition (%) | ||||||||
| Steel Grade | Material Number | C | Si | Mn | P | S | Cr | Mo | |
| DIN 2391 | ST35 | 1.0308 | <= 0.17 | <= 0.35 | >=0.04 | <=0.025 | <=0.025 | - | - |
| ST45 | 1.0408 | <= 0.21 | <= 0.35 | >=0.04 | <=0.025 | <=0.025 | - | - | |
| ST52 | 1.058 | <= 0.22 | <= 0.55 | <=1.60 | <=0.025 | <=0.025 | - | - | |
| Standard | Material Chemical Composition (%) | ||||||||
| Steel Grade | Material Number | C | Si | Mn | P | S | Cr | Mo | |
| DIN1629 | ST37 | 1.0254 | <= 0.17 | <= 0.55 | <=1.60 | <=0.04 | <=0.04 | - | - |
| ST44 | 1.0258 | <= 0.21 | <= 0.55 | <=1.60 | <=0.04 | <=0.04 | - | - | |
| ST52 | 1.0421 | <= 0.22 | <= 0.55 | <=1.60 | <=0.04 | <=0.035 | - | - | |
| DIN1630 | ST37.4 | 1.0255 | <= 0.17 | <= 0.35 | >=0.035 | <=0.04 | <=0.04 | - | - |
| ST44.4 | 1.0257 | <= 0.21 | <= 0.35 | >=0.04 | <=0.04 | <=0.04 | - | - | |
| ST52.4 | 1.0281 | <= 0.22 | <= 0.55 | <=1.60 | <=0.04 | <=0.035 | - | - | |
| Standard | Material Chemical Composition (%) | ||||||||
| Steel Grade | Material Number | C | Si | Mn | P | S | Cr | Mo | |
| EN10305-1 EN10305-4 | E235 | 1.0308 | <= 0.17 | <= 0.35 | >=0.04 | <=0.025 | <=0.025 | - | - |
| E255 | 1.0408 | <= 0.21 | <= 0.35 | >=0.04 | <=0.025 | <=0.025 | - | - | |
| E355 | 1.058 | <= 0.22 | <= 0.55 | <=1.60 | <=0.025 | <=0.025 | - | - | |
| Standard | Material Chemical Composition (%) | | |||||||
| Steel Grade | Material Number | C | Si | Mn | P | S | Cr | Mo | |
| ASTM A519 | 1010 | - | 0.08-0.13 | - | 0.3-0.6 | ≤0.04 | ≤0.05 | - | - |
| 1020 | - | 0.18-0.23 | - | 0.3-0.6 | ≤0.04 | ≤0.05 | - | - | |
| 1045 | - | 0.43-0.50 | - | 0.6-0.9 | ≤0.04 | ≤0.05 | - | - | |
| 4130 | - | 0.28-0.33 | 0.15-0.35 | 0.40-0.60 | ≤0.04 | ≤0.05 | 0.8-1.1 | 0.15-0.25 | |
| 4140 | - | 0.38-0.43 | 0.15-0.35 | 0.75-1.0 | ≤0.04 | ≤0.05 | 0.8-1.1 | 0.15-0.25 | |
| Standard | Material Chemical Composition (%) | ||||||||
| Steel Grade | Material Number | C | Si | Mn | P | S | Cr | Mo | |
| JIS G3445 | SKTM 12C | - | <= 0.12 | <= 0.35 | <= 0.60 | <=0.04 | <=0.04 | - | - |
| STKM 13C | - | <= 0.25 | <= 0.35 | 0.3-0.9 | <=0.04 | <=0.04 | - | - | |
| Standard | Material Chemical Composition (%) | ||||||||
| Steel Grade | Material Number | C | Si | Mn | P | S | Cr | Mo | |
| GB/T 8162 GB/T 8163 GB/T 3639 | 10 | - | 0.07-0.14 | 0.17-0.35 | 0.35-0.65 | <=0.035 | <=0.04 | - | - |
| 20 | - | 0.17-0.23 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | - | - | |
| 45 | - | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | ≤0.035 | ≤0.035 | - | - | |
| Q345B | - | ≤0.20 | ≤0.50 | <=1.70 | ≤0.035 | ≤0.035 | - | - | |
ID tolerance can minimized to +/-0.02mm
OD: 5- 250mm
ID: 3- 200mm
| Equivalent Material referance: | ||||||
| GB | TOCT | ASTM | BS | JIS | NF | DIN |
| 10F | | 1010 | 040A10 | | XC10 | |
| 10 | 10 | 10,101,012 | 045M10 | S10C | XC10 | C10,CK10 |
| 20 | 20 | 1020 | 050A20 | S20C | XC18 | C22,CK22 |
| 45 | 45 | 1045 | 080M46 | S45C | XC45 | C45,CK45 |
| 30CrMo | 30XM | 4130 | 1717COS110 | SCM420 | 30CD4 | |
| 42CrMo | | 4140 | 708A42 | | 42CD4 | 42CrMo4 |
| | | | 708M40 | | | |
| 35CrMo | 35XM | 4135 | 708A37 | SCM3 | 35CD4 | 34CrMo4 |
The main advantage of cold-rolled steel pipe is the large cross-section reduction rate, especially the strong wall reduction ability. For carbon steel, the cross-section reduction rate of one rolling can reach 80%~83%, and alloy steel can reach 72%~75%. Its main disadvantage is the difficulty of tool replacement. In addition to being directly used to produce a part of cold-rolled pipes with high precision, the cold rolling method is often used in combination with the cold drawing method to open blanks for cold drawing. This not only gives full play to the wall reduction ability of cold rolling, but also cleverly takes advantage of the easy replacement of cold drawing tools, which is conducive to improving productivity, expanding the production range of products and improving the surface quality of steel pipes.
At present, cold-rolled pipe production multi-purpose periodic cold-rolling mill. The working characteristics of the periodic cold rolling mill are that the steel pipe and mandrel do not move, and the reciprocating movement of the frame drives the rolling and rolling reciprocating rolling steel pipe, and the variable section hole type compression rolled parts are used to achieve the purpose of diameter reduction and wall reduction.
1. For Vehicle (Automotive, locomotive, Construction Machinery like Concrete pump and others)
Power steering system, Shock absorber, vibration damper , engine parts and others
2. Hydraulic cylinder, Industry Jacks
3. Fitness equipment,motor casings and auto parts.
Other precision surface required devises
by boxes or bundles
Chewit International
Chewit international Located in zhangjiagang city which is along The Yangtze Golden Channel the junction of River and Coast Economic Belt. It owns an excellent geographic position, as it is close to Nanjing city in the north, adjacent to Suzhou and Wuxi cities in the south, next to Shanghai international city in the east. Zhangjiagang international port and State highway endow us a convenient water and land transportation which links us to the outside world both home and aboard. Chewit International is one group company with two manufactures one is producing steel forgings for Marine, Power, Boiler, Ocean, Oil, Petrochemical, Mechanical and Hydraulic fields and the other is producing precision steel tubes for automotive industry and hydraulic system and also one semi-independent company specially for import and export business. We have a total area of 150000 square meters with the employees over 200 people. All the products well produced by our mills need to be double inspected by chewit professional quality controller and then we will offer our customer the vivid report for the tested items. Only those products which are inspected well can be allowed to delivery to our customers. By the means of strict inspection, we wined a lot of customer for long term business both home and abroad. We have customers like Danieli, Cedervall,Wartsila,Sannat mansur, SeaLink, Tata Group, Continental, Iran Khodro and also other well reputated ones. We adhere to our company tenet Customer First, Quality formost and always try our best to serve our customer with our full heart.
1. who are we?
We are based in Jiangsu, China, start from 2010,sell to Eastern Asia(20.00%),Mid East(20.00%),Eastern Europe(15.00%),Southeast Asia(15.00%),Northern Europe(10.00%),Domestic Market(10.00%),South America(5.00%),Western Europe(5.00%),South Asia(0.00%),North America(0.00%),Oceania(0.00%),Southern Europe(0.00%),Central America(0.00%),Africa(0.00%). There are total about 11-50 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Steel Pipe, Seamless Pipe, Hydraulic Oil Tube, Precision Tube, Stainless Steel Tube
4. why should you buy from us not from other suppliers?
Production: Advanced production line and drawing with special oil to make the surface in best condition. Lower roughness and good mechanical performance. Inspection before delivery: Professional team for inspection and randomly check
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,DDP,DDU;
Accepted Payment Currency:USD,EUR,HKD,CNY;
Accepted Payment Type: T/T,L/C,MoneyGram;
Language Spoken:English,Chinese,Spanish,Japanese