PSI - Issue 59

Teguh Muttaqie et al. / Procedia Structural Integrity 59 (2024) 222–229 Muttaqie et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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specimen during the impact is measured. This measurement can provide valuable information about the material's ability to withstand high-impact loads.

(a)

(b)

Fig. 1. Material SUS 304 for LNG tank material, (a) LNG Carrier Membrane Type, and (b) ISO tank for small scaled LNG.

To produce accurate and significant results from impact testing, high-quality test specimens must be manufactured. Test specimens were created from SUS 304 sheet plate. Table 1 describes the chemical composition and general mechanical properties of this material According to ASME Standard (ASME, 2019). Samples are prepared according to the JIS B7722, which is also equal to the ASTM E23 standard. The dimensions are 55 mm x 10 mm x 10 mm with 45 deg notch and 2 mm V-depth. Figure 2 describes the test specimen scheme along with the test objects.

Table 1. Material standard in ASME SA240 for SUS 304. Item Description Material Specification SA-240 Grade 304 Nominal composition [wt %] 18Cr-8Ni Min Yield Strength [MPa] 205 Min Tensile Strength [MPa] 515

Figure 2. Test specimen according to the Charpy impact standard.