Notes for Hardness Test:P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC]. Notes for Bend Test:For pipe whose diameter exceeds NPS 25 and whose diameter to wall thickness ratio is 7.0 or less shall be subjected to the bend test instead of the flattening test.
An approach to 570 °C/105h creep rupture strength May 01, 2020 · The load applied to the Brinell hardness measurements was 29,420 N for 10s. Each sample was tested at least 3 times. The creep rupture tests at a varying stress level ranging from 95 to 220 MPa were carried out at 570 °C on the P91 component specimens with a hardness value between 151 and 205HBW.
Nov 04, 2020 · The impact test results satisfied the lateral expansion requirement, regardless of the area. The minimum lateral expansion measured in the impact test was 1.11 mm in the transition area. The hardness of the inner and outer surfaces was almost the same. All test results met the hardness requirement of 265 HV for the ASME Code.
Astm A335 Pipe Specifications FerropipeASTM Specification pipe confirming to ASTM A335 shall have the following chemical properties. Tensile and Hardness Requirements The tensile properties of the ASTM A335 pipe shall conform to the requirements as prescribed. Pipe of Grades P91, P92, and P122 shall have a hardness not exceeding 250 HB/265 HV [25 HRC].
Hardness Test Criteria after PWHT (A335 P11) - ASME Please help me regarding Hardness Test after PWHT. Our company has already done PWHT for material A335 P11 using the temperature of 730 DEGREES CELSIUS. As per ASME code B31.1 the temperature for this material is 650 to 700 Degrees Celsius only. So, we exceed the required temperature. Our client ask us to do a hardness test on HAZ on all 100
Hardness of P91 Material weld By chall Date 02-12-2008 13:08 ASME B31.3, Table 331.1.1 (Requirements for Heat Treatment) specifies a maximum Brinell Hardness value of 241 for P5B materials (which P91 grade material is) following PWHT. PWHT is required for all P5B materials if your code of construction is any of the ASME codes.
Investigation of Relationship Between Microhardness for measuring the SA-508 HAZ hardness since it is known that they can affect the hardness values and variability of the measurements [9, 10]. The different microstructures in the HAZ of a TB weld were simulated using a 3800 thermo- Gleeble mechanical simulator. Simulated cooling rates were set at 10°, 20°, and 40° C/s.
LIFE ASSESSMENT OF GRADE 91 COMPONENTS BASED range of supplied P91 material after tempering should be 210-240HV. The acceptable range of hardness for P91 components entering service is generally considered to be ~190-265HV .
Fig. 1. (a) Geometry of the joint according to ASME B31.3; (b) Pipe machined according to (a); (c) Joint pieces cut at 120 º and ready to be welded; (d) welded joint. Hardness measurements were done by means of an Indentec digital durometer, using 5 kf preload and a diamond Vickers indenter.
Use and Abuse of P91 and P92 SteelsHardness measurements on replicas areas showed values that were well below the minimum expected for this type of steel. Because of the lengthy delivery times for valves (8-10 months), the insertion of two temporary replacement logs (22", 24 mm thick, P91) was effected. The two removed valves were subjected to metallographic investigation in
Welding Grade 91 Alloy SteelAfter PWHT, the weld hardness should be in the range of 200 to 275. Hardness up to 300 Brinnell may be accepted, but any hardness over 300 is an indication of inadequate PWHT. SMAW and SAW weld metal will exhibit higher hardness when compared to GTAW and FCAW. Hardness below 175
1350 to 1425F. <1.5 % but > 1.0%, 1350 to 1450F. < 1.0%, 1350 to 1470F. May use 1325F min. if < 0.5 thick. 720 740 760 780 800 820 840 0.5 1.0 1.5 2.0 2.5 Ni+Mn, wt%. C. Metrode consumables (measured) Other P91 consumables (measured) P91 base material (V&M CCT diagram) Ni+Mn%=1.5% 15ÛC Recommended max. PWHT temperature.