Application:Used in petroleum, chemical industry, aerospace, paper, automobile, packaging machinery,
decoration, railings and other engineering, hardware processing, ships, power plants and other industries.
| Subjection : Specificationsfor Raw Material of Sleeves (High Carbon - Chromium Bearing Steel Tubes) |
| 1. Specifications for Finish Tubes |
| Material : GCR15/SAE 52100/100CR6/SUJ2 or Its Equivalent |
| Reference: GB/T 18254; YB-T 4146; SKFD33; |
| S13000; JISG4805; ASTMA295; |
| A. Chemical Composition |
| | C | Si | Mn | S | P | Cr | Al | O2 | H2 | N2 | Ti (ppm) |
| | | | | | | | | (ppm) | (ppm) | (ppm) | |
| MIN. | 0.95 | 0.15 | - | - | - | 1.3 | - | - | | | - |
| MAX. | 1.1 | 0.35 | 0.5 | 0.025 | 0.025 | 1.6 | 0.05 | 15 | 1 | 100 | 30 |
| B.Microstructure | | | | | | | | | | |
| Spherodised Annealed, consist of uniformly distributed spheroidalcarbides in a matrix of ferrite and shall be free from excessive carbidesegregation. |
| C. Macro Etch Test | | | | | | | | | | |
| Billet sample taken in accordance with A295 shall be macro-etched and examined. | | | | | |
| It should be free from pipe, porosity and injurious defects. | | | | | | | |
| D. Non Metallic Inclusions : | | | | | | | | | |
| According toA.S.T.M A 295 for through hardening bearing steel the inclusion rating shall beperformed using the recommended ASTM - E 45 Method -D and the rating shall notexceed the limits specified below: |
| | A | | B | C | D |
| Thin | Heavy | Thin | Heavy | Thin | Heavy | Thin | Heavy |
| 2.5 | 1.5 | 2 | 1 | 0.5 | 0.5 | 1 | 1 |
| E. Decarb Layer: | | | | | | | | | | |
| Surfacedefects inclusive of decarburized depth not to exceed 0.25mm. | | | | | | |
| Total decarburized depth is defined as distancefrom the surface of decarburized layer to the position where the difference inchemical or physical properties between the decarburized layer & the |
| corematerial is no longer determinable. | | | | | | | | |
| F. Surface Quality : | | | | | | | | | | |
| Noscratch marks & cracks. The tubes shall be well finished and the outside& inside surfaces shall be free from injurious defects for practicaluse.All tubes shall be inspected for ultrasonic tests as per ASTM D213. |
| G. Manufacturing process : | | | | | | | | | |
| Cold Drawn or Cold Pilgered. | | | | | | | | | |
| H. Product Tolerance | | | | |
| Sr.No. | OD(mm) | Tube wall thickness |
| (mm) |
| 1 | 0 | -0.0/+5% of WT |
| | | | | | | | | |
| I. Other specifications |
| Parameter | | | Specification |
| Hardness | | | 220 BHN max |
| Magnetism | | | Material will be free from magnetism. |
| Straightness | 1 mm per Meter on any running length |
| Length | | | 5.8m max. |
| Inspection | | | All tubes will be 100% inspected by PMI test or spark test to ensure to no mix-up of material. |
| Marking | | | Manufacturer’s mark & name, Grade, size, Heat Number, Year |
| | | | & month of manufacture. |
| Coating | | | Rust preventive oil on outside & inside surfaces. |
Production Detection:
1. Complete testing facilities
2. Perfect measurement methods
3. Perfect production detection methods
4. Strong QC team,conduct comprehensive quality control
FAQ
Q1:who are we?
A:We are based in WUXI, China, start from 2016,sell to Asia(60.00%),Western Europe(14.00%),South
America(6.00%).
Q2. how can we guarantee quality?
A:Always a pre-production sample before mass production; Always final Inspection before shipment.
Q3.what can you buy from us?
A:Copper,Aluminum,Mould steel, Seamless carbon steel,Precision steel pipe,The steel plate,Alloy steel
Titanium,Custom machine parts.
Q4.why should you buy from us not from other suppliers?
A:Wuxi Easony Machinery Co., Ltd. has 8 years of production experience. With advanced precision
production equipment and modern large warehouses, has a stockpile of 200,000 tons of goods, has a number
of long-term stable cooperative customers.
Q5.what services can we provide?
A:Accepted Delivery Terms: FOB,CFR,CIF,EXW；Accepted Payment Currency:USD,EUR,JPY,CAD,AUD,
HKD,GBP,CNY,CHF;
Accepted Payment Type: T/T,L/C,D/P D/A,PayPal;Language Spoken:English,Chinese.
Q6.Can we get the some samples?Any charges?
A:Yes,you can get available samples in our stock.Free for real samples,but customers need to pay the freight cost.
Q7.How can we get your price ?
A:We need below information to quote for you:
1)Product Name
2)Standard
3)Material Grade (Chemical Composition)
4)Dimension
5)Quantity
6)The Drawing for Special Parts
