SHANGHAI UNITE STEEL
One-stop Brand Service Provider For Globle Machinery And Petrochemical Enterprise And Special Steel Distributor.
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4130/25CrMo4/SCM430 Hydraulic Cylinder Steel Tube High Precision Cold Finished Precision Tube
OVERVIEW
25CrMo4, is alternately classified as structural steel for heat improvement and as a boiler steel designed to work at elevated temperatures. It exhibits very good strength properties, high ductility, weldability and good hardenability. Compared to the 35HM and 34CrMo4 grades, after heat treatment it has slightly worse strengths, but it makes up for the lower properties with much better ductility.
25Crmo4 seamless steel pipe/tube is a common chromium molybdenum alloy steel pipe. It contains a lower carbon content compared with 42CrMo4 steel pipe.
25Crmo4 seamless steel pipe can be used in the manufacture of the corrosive medium under carburizing and quenching condition.
APPLICATIONS
Examples of applications for 25Crmo4 seamless steel pipe include structural tubing, connection rods, stem assemblies, tool holders, tubes for transportation of pressurized gases. It is also mainly used for a variety of applications in the oil and gas industry.
STANDARD SPECIFICATIONS
| Process | Honed tube for Hydraulic Cylinder |
| Shape | Round |
| Size Range | Cold Drawn: 6-426mm OD; 1-40mm WT Hot Finished: 32-1200mm OD; 3.5-200mm WT |
| Thickness | Upto 200mm |
| Pipe End | Plain / Beveled / Vanished / Plastic Caps |
| Coating | Anti-rust oil on inside and outside surface, plastic caps in both ends. |
| Length | 15 Mtr max Cut to Length available |
| Heat Treatment | Spheroidizing / Full Annealing / Process Annealing / Isothermal Annealing / Normalizing / Quenching / Martempering (Marquenching) / Quench And Tempering / Austempering |
| Delivery Conditions | BK, BK+S, GBK, NBK, etc |
| Application | Oil & Gas / Hydro Carbon Process / Automotive / Boiler, Heat Exchanger / Plumbing, HVAC & Firefighting / Structural / General Engineering / Railways / Sewage & Waterwell |
| Packing | Bundle with steel strip and knitting strip, or wooden case. |
| Quality Inspection | Third Party inspection is acceptable (SGS, BV etc.) |
TOLERANCE FOR SEAMLESS TUBING
| Inside Dia (mm) | ID Tolerance (mm) | WT Tolerance (mm) | |||
| H7 | H8 | H9 | H10 | ||
| ≤30 | +0.021/0 | +0.033/0 | +0.052/0 | +0.084/0 | ±5% |
| 30 - ≤50 | +0.025/0 | +0.039/0 | +0.062/0 | +0.100/0 | |
| 50 - ≤80 | +0.030/0 | +0.046/0 | +0.074/0 | +0.120/0 | |
| 80 - ≤120 | +0.035/0 | +0.054/0 | +0.087/0 | +0.140/0 | |
| 120 - ≤180 | +0.040/0 | +0.063/0 | +0.100/0 | +0.160/0 | |
| 180 - ≤250 | +0.046/0 | +0.072/0 | +0.115/0 | +0.185/0 | |
| 250 - ≤315 | +0.052/0 | +0.081/0 | +0.130/0 | +0.210/0 | |
| 315 - ≤700 | +0.057/0 | +0.089/0 | +0.140/0 | +0.230/0 | |
Relavent Standard & Grades Equivalency
| Country | USA | EN | Japan | China |
| Standard | ASTM A519 | EN 10305 | JIS G3441 | GB/T 8162 |
| Grades | 4130 | 25CrMo4 | SCM430 | 30CrMo |
-ASTM A519 Seamless Carbon and Alloy Steel Mechanical Tubing
-EN 10297-1 Seamless Circular Steel Tubes for Mechanical and General Engineering Purpose
-EN 10305 Steel Tubes for Precision Applications Technical Delivery Conditions Seamless Cold Drawn Tubes
-DIN 2391 Seamless Precision Steel Tubes
-JIS G3441 Alloy Steel Tubes for Machine Purpose
Chemical Requirements, Composition, %
| Grade | C | Si | Mn | P | S | Cr | Mo | Cu |
| 4130 | 0.28~0.33 | 0.15~0.35 | 0.40~0.60 | ≤0.035 | ≤0.040 | 0.80~1.10 | 0.15~0.25 | / |
| SCM430 | 0.28~0.33 | 0.15~0.35 | 0.60~0.90 | ≤0.030 | ≤0.030 | 0.90~1.20 | 0.15~0.30 | / |
| 25CrMo4 | 0.22-0.29 | ≤0.40 | 0.60~0.90 | ≤0.025 | ≤0.035 | 0.90~1.20 | 0.15~0.30 | / |
| 30CrMo | 0.26~0.34 | 0.17~0.37 | 0.40~0.70 | ≤0.035 | ≤0.035 | 0.80~1.10 | 0.15~0.25 | / |
Mechanical properties
Heat Treatment & Process
Our Services
What we can offer?
-We offer a wide range of steel products in a wide variety of dimensions and executions, according to the common international specifications or customize.
-Machining and heat treatment are available.
-Also, we advise you in choosing the right materials.
Quality Assurance
Below inspection will be done in the production.
(1) ray detection---RT;
(2) ultrasonic testing---UT;
(3) Magnetic Particle Testing-MT;
(4) penetration testing-PT;
(5) eddy current flaw detection-ET
Package
In standard export packing and seaworthy material with hexagon shape bundle, covered with tarpaulin, in containers or in bulk, or upon request
Payment & Delivery
1. Both T/T and L/C will be acceptable
2. Trade Terms: FOB, CIF, CFR
3. The delivery will be in 10-15 days if have stock; For customized items, the delivery will be negotiated by both parties
4. Shipping by sea freight from Shanghai Port (PRC) for Bulk orders, by airfreight or express for samples
Shanghai Unite Steel Trading Co., Ltd
We are committed to integrate engineering steel resources in china and serve the global engineering steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise.
In the aspect of resources and information, we have established cooperative and stronger relationship with nearly hundred enterprises, either state-owned or private owned in china.
What’s more, we have built long, deep and close business relationship with dozens of steel company, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want!
Q: Are you a manufacturer or merely a trader?
A: We are group of companies and owned manufacturer bases and trading company. We specialized in special steel which include alloy structural steel and carbon steel and stainless steel, etc. All material are with high quality and competitive price.
Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party, such as TUV, CE, if you need. Secondly, we have a complete set of inspection system and every process is checked by QC. Quality is the lifeline of enterprise survival.
Q: Delivery time?
A: We have ready stock for most of material grades in our warehouse. If the material doesn't have stock, the delivery lead time is about 5-30 days after receiving your prepayment or firm order.
Q: What is the payment term?
A: T/T or L/C.
Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you come to China and arrange our driver to our airport to pick you up when you come.