OXIDATION RESISTANCE The maximum temperature to which Type 304 can be exposed continuously without appreciable scaling is about 1650 °F (899 °C). For intermittent cyclic exposure, is about 1500 °F (816 °C). HEAT TREATMENT Type 304 is non-hardenable by heat treatment. Annealing:Heat to 1900 2050 °F (1038 1121 °C), then cool rapidly.
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Applying rule 1) and 2) above, the lower of. (1/3) of S T = (1/3)*60ksi = 20ksi. and. (2/3) of S Y = (2/3)*35ksi = 23.3ksi. The lower of the two values is 20ksi. Hence the value of allowable stress is 20ksi from minimum temperature to 400°F.
Allowable Working Pressures (Type 304L)Allowable Working Pressures (Type 304L) The allowable stress values used are shown in table A-3 of the ASME Code for Pressure Piping B31.1 1989 Edition for welded pipe to SA-312 with a weld joint efficiency of 0.85. Allowable working pressures shown reflect the minimum wall thickness. PIPE. ASTM A312 / ASME SA312.
COMPARISON OF 316 AND 316L APPLICATION DATA allowable stress of 20,000 psi for each of the cast alloys. Another difference in the Pressure Vessel Code is that 316 and CF8M may be used at temperatures up to 1500F, whereas the 316L and CF3M alloys are limited to a maximum
CS 304L can be stress relieved at 450-600 o C for one hour with little danger of sensitisation. A lower stress relieving temperature of 400 o C maximum must be used. 3.
Maximum Allowable Stress Values ASME Pressure Vessel For example, if a 60,000 psi tensile strength material is used, the Maximum Allowable Stress Value is 15,000 psi. Division 2:Governs the design by Analysis" and incorporates a lower safety factor of 3. Thus, the maximum allowable stress value for a 60,000 psi tensile strength material will become 20,000 psi.
Stainless Steel - Grade 304Grade 304 is the standard "18/8" stainless; it is the most versatile and most widely used stainless steel, available in a wider range of products, forms and finishes than any other. It has excellent forming and welding characteristics.
Jan 08, 2002 · For example, if a three-meter long Grade 304 bar (coefficient of expansion 17.2 m/m/°C) is heated from 20°C to 200°C, the length increases by:3.00 x 180 x 17.2 = 9288 m = 9.3 mm. The coefficient of thermal expansion of the austenitic stainless steel is higher than for most other grades of steel, as shown in the following table. Table 2.
Stainless Steel Pipe & Tube Pressure Ratings- The above table and the equations are based on paragraph 304.1 of ASME B31.3a-1996 - The value for Y may be interpolated for intermediate temperatures. For t > D/6:Basic quality factors E for longitudinal weld joints in stainless steel pipes, tubes and fittings Note -
What are allowable maximum stresses for stainless steel In this the allowable stress is usually a fraction of the yield strength and can be different for uniform tension and bending. Typically mild steel has a yield strength of about fy=250MPa with
In essence, the fatigue strength of a welded joint should be used for design purposes, as the inevitable aws (even only those of cross-sectional change) within a weld will control the overall fatigue performance of the structure. The curve below shows a typical S-N curve for 304 stainless steel. 400 300 200 100 0 10 Number of Cycles Maximum Stress, MPa