1. Material
DIN17350, DIN 21CrMo10, 35CrMo
2. Chemical Components
DIN17350, DIN 21CrMo10
3. Smelting method
Electric arc furnace + refining furnace(vacuum arc degassing)
4. Technical parameters of machining
Specification(OD): 100-1200mm
Specification(L. ): Max. 6 m
Surface roughness: 1.6
Precision(mm): 0.1
Flaw detection: SEP1921
Grain Size: ASTM E-112
Concentricity: 0.08mm
Conicity: 0-1mm
5. Test method and standard
Test spots: Half spot of wall thickness, two portraits of such spot.
Tensile test: GB/T288-2002 standard.
Hardness test: GB/T231 standard.
6. The standard of ultrasonic test
The forging of the mould will be ultrasonically tested as per JB/T1581-1996 or equivalent standard, details as follows:
A. Without bursts, crack, shrinking hole and other defects.
B. The defect with size within 2mm can be ignored.
C. There should not have compact district.
D. Individual defect with diameter of 2~4mm is permitted, and the distance of the neighboring defects should be more than the 10 times of the bigger one's. For 100cm2' s area, the quantities of the defects with diameter of 2~4mm should not exceed 3.
The above-mentioned parameters are for reference only, we can produce various kinds of pipe mold as per customers' requirements.
7. Package
By crate adapted to seaway
Zhengzhou Chenghe Machinery Co., Ltd. is located in Zhengzhou, the capital of Henan province, Central China.
We are specially dealing with two types of products: The first category includes a variety of special steel forgings and machining parts, representative products are: 1. Oilfield stabilizer (finished and the Forged billet), drill pipe, drill collar, pup joint, and all kinds of union, oil casing; 2. Mill roll; 3. PQF Mandrel bar 4. Non-standard gear, shaft with deepholes ( length up to 12 meters), large motor shaft, engine crankshaft, hydraulic cylinder for mining machinery and other machining products; The second category includes machineries and equipments, the main products are: 1. Petroleum solid control equipment, including mud circulation tank, shale shaker, mud cleaner (AIO), centrifugal sand pump, YQ series of gas-liquid separator and other 10 kinds of products; 2. Packaging machinery, including transparent film packaging machine, strapping, etc.
Our products have been exported to Middle East, Europe, India, USA, Southeast Asia ect. Countries and districts and mainly used for metallurgy, machinery, petroleum, shipping, chemical and packaging industries.
With a perfect quality control system, high standard quality and reliable product performance, timely delivery and excellent after-sales service, Chenghe has won wide acclaim from customers, sincerely welcome customers at home and abroad send enquiries or come to negotiate.
