Description
We are professional forged Forging Nonmagnetic Steam Turbine Generators Rotor Retaining Rings in material grade of (ASTM A289/A289M,(X8CrMnN18-18,X8CrMnN1818,P900,1.3816) from china
The reference of inspection standard of forged turbine retaining rings is as follows:
ASTM A289/A289M,ASTM A788/A788M,ASTM A370,ASTM A531/531M, ASTM A342/342M
The material grade of forging gas steam turbine retaining ring is as follows:
ASTM A289/A289M
X8CrMnN18-18
X8CrMnN1818
P900
1.3816
Forging is widely used in Wide range of applications in the industry, including thermal power and nuclear power, gas turbines for large ships, and traction motors for high-speed trains
The chemical compostion of forged steel steam turbine Retaining Rings is as following:
| C | Mn | P | S | Si | Ni | Cr | N | Ti | Al | V | ||||||||
| ≤0.1 | 17.5~20 | ≤0.06 | ≤0.015 | ≤0.8 | ≤2 | 17.5~20 | 0.45~0.8 | ≤0.1 | ≤0.04 | ≤0.25 | ||||||||
The mechanical property of forging steel turbine Retaining Rings is as follows:
|
Tensile strength N/mm² |
Proof stress N/mm² |
Elongation % |
Reduction % |
Charpy V · Notch Energy |
||||||||||
| ≥1000 | ≥930 | ≥28 | ≥60 | ≥95 | ||||||||||
Test piece picking "Pick one set of test piece from every furnace,and from the same heat treatment.Manufacture 1 lot of the test pieces from two rings.
As per ASTM A289/289M" Test piece "Tensile strength test:ASTM A 370 Hardness Test:ASTM A 370" Test Method "Tensile strength test:ASTM A 370 Hardness test:ASTM A 370
All our forged turbine retaining rings should ultrasonic test as per As per ASTM A531/A531M
1.Any indications that are considered to be rejectable by the standard practices of the supplier shall be reported
2.Any indication that exceeds 25%of the full amplitude line while scanning a distance greater than 150%of the beam width or 12.7 mm, whichever is greater.
3.Any indication that exceeds 25% of the full amplitude reference line that demonstrates a radial extent greater than 6.35 mm while scanning a distance greater than 150% of the beam width or 12.7 mm,whichever is greater
4.Due to the nature of some rings to have an elevated noise level while scanning in the axial direction,a 35%of full amplitude line reporting criteria may be used.This change shall be noted on the examination report.
5.Any indications in excess of 5% of the back reflection during longitudinal wave noise scan shall be reported.
6.Any occurrence of 50%or greater loss of back reflection shall be reported.
Rings containing no recordable indications are acceptable
Rings of such coarse grain size or microstructure that the indication from the test notch cannot be distinguished above the noise level are subject to rejection.
Osmosis crack test judgment for turbine retaining rings
Shall be done after manufacturing the component Can be passed except the following
1.The crack flaw.
2.The limiting flaw per 10cm
a. Line
i.Maximum 4mm/line
ii.Sum of 10 Lines≤17mm
b.Point
i.Dia≤1mm
ii.No of points≤20
3.Any flaw which cannot be removed by 2mm grinding
4.Magnetic permeability test" "The permeability of the forgings at a magnetizing orce of 100 oersteds shall not exceed 1.5."
Carved seal for every steam turbine turbine retaining rings
Indication" "Cave a seal on the steel specimen for furnace number a heat treatment symbol,mark of the maker on the face.
Following is all testing report that we supply for forging steam turbine turbine retaining rings
1. Chemical composition The same furnace
2. Mechanical nature "The test which picks one set in the same furnace,the
same heat treatment,(The test piece extracts from
one in two)"
Hardness measurement All
4. Dimension inspection All
5. Appearance inspection All
6. Ultrasonic crack test All
7. Osmosis crack test All
8. Magnetic permeability Test All
Welcome your inquiry of forged Forging Nonmagnetic Steam Turbine Generators Rotor Retaining Rings
