What is difference between A193 B7 and B7M?
The minimum tensile strength for A193B7 is 125 ksi for diameters under 2-1/2”, and 115 ksi for 2-1/2” – 4” diameter. Hardness is probably the most significant difference between A193B7M & A193B7. The maximum hardness of ASTM A193B7M is 235 HB or 99 HRB, while the maximum hardness of A193B7 is 321 HB or 35 HRC.
What is the difference between L7 and L7M?
Both Grade L7 and L7M are manufactured from a quenched and tempered alloy steel. While the chemical requirements for both Grades L7 and L7M are identical, there are several differences that separate the two grades. Grade L7 bolts are significantly higher in strength than Grade L7m bolts.
What is ASTM A320 L7M?
ASTM A320 Grade L7M is a standard material specification for alloy steel bolting materials for pressure vessels, valves, flanges, and fittings for low temperature services. ASTM A320 Grade L7M is heat treated chromium molybdenum alloy steel (AISI 4140/AISI 4140H) with notch toughness properties.
What is ASTM A276 stainless steel?
The ASTM A276 specification is for hot-finished or cold-finished stainless-steel bars except bars for reforging. This includes rounds squares, and hexagons, and hot-rolled or extruded shapes such as angles, tees and channels that are commonly used types of stainless steels.
What is A276 stainless steel?
This specification covers hot-finished or cold-finished bars except bars for reforging. It includes rounds, squares, and hexagons, and hot-rolled or extruded shapes, such as angles, tees, and channels in the more commonly used types of stainless steels.
What is a Crosshole test (CHT)?
A crosshole test (CHT) is performed to determine the shear wave velocity of soils to measure its stiffness. The crosshole test is conducted for site investigation and characterization of material in soil deposits or rock formations, and the data is used to obtain a detailed in-situ seismic wave velocity profile.
What is ASTM A193 specification?
ASTM A193 specification for alloy-steel and stainless steel fasteners for high tensile or high temperature applications. This specifications covers various alloy & stainless steel bolting grades with requirements for chemical composition, mechanical properties, heat-treatment, recommended nuts-washers and bolt markings. ASTM A193 Specification Home
What are the procedures for cross Crosshole seismic testing?
Crosshole seismic test procedures are outlined in ASTM test designation D4428 M-84 (1984). The ASTM procedures provide specific guidelines for borehole preparation, data acquisition, and data reduction/ interpretation.
What are the most critical elements of Crosshole testing?
Another critical element of crosshole testing, which is often ignored, is the requirement for borehole directional surveys. There are several very good directional survey tools available that yield detailed deviation logs of each borehole used at a crosshole site.