“…Brozda and Pasternak 34 and Brózda 35 investigated the hardness and impact properties of simulated HAZs and actual welds in Grade 23. The HAZ simulations were conducted on both T23 and P23 steels consistent with a coarse-grained HAZ (CGHAZ).…”
Section: Mechanical Properties Of Weldsmentioning
confidence: 99%
“…Adapted from Brozda and Pasternak 34 and Brózda. 35 Note : 1250°C (2282°F) peak temperature, and cooling times from 800 to 500°C ( t 8/5 ) of 6, 24, 60 and 300 s. Impact specimens were sub-size (10 mm × 5 mm) 22 Impact strength and hardness values for simulated HAZs in P23 base material with peak temperature of 1250°C (2282°F). Adapted from Brozda and Pasternak 34 and Brózda.…”
Section: Review Of Grade 23mentioning
confidence: 99%
“…Impact strength and hardness values for simulated HAZs in T23 base material with peak temperature of 1250°C (2282°F). Adapted from Brozda and Pasternak 34 and Brózda 35. Note: 1250°C (2282°F) peak temperature, and cooling times from 800 to 500°C (t 8/5 ) of 6, 24, 60 and 300 s. Impact specimens were sub-size (10 mm × 5 mm) 24 Effect of aging time on hardness for T23 heat affect zone in the as-welded and PWHT conditions (750°C/2 h).…”
mentioning
confidence: 99%
“…Adapted from Mohyla and Foldyna36,37 23 Effect of PWHT on the Charpy impact toughness in the deposited weld metal and heat affect zone, as compared to P23 base material. Adapted from Brozda and Pasternak 34 and Brózda35 22 Impact strength and hardness values for simulated HAZs in P23 base material with peak temperature of 1250°C (2282°F). Adapted from Brozda and Pasternak 34 and Brózda 35.…”
mentioning
confidence: 99%
“…Adapted from Brozda and Pasternak 34 and Brózda35 22 Impact strength and hardness values for simulated HAZs in P23 base material with peak temperature of 1250°C (2282°F). Adapted from Brozda and Pasternak 34 and Brózda 35. Note: 1250°C (2282°F) peak temperature, and cooling times from 800 to 500°C (t 8/5 ) of 6, 24, 60 and 300 s. Impact specimens were full size (10 mm square)…”
Grades 23 and 24 creep strength enhanced ferritic (CSEF) steels are relatively new materials that have been designed with improved high-temperature strength compared to conventional 2.25Cr-1Mo alloys. These new steels share alloying strategies that were used in the past for CrMo derivatives such as the CrMoV steels. Grades 23 and 24 are often grouped with similar CSEF steels in terms of mechanical properties and fabrication characteristics. However, recent experience indicates that these alloys require more unique care to ensure adequate properties for the intended service in both the base metal and welds. The differences in behaviour between these new steels and more conventional CrMo steels can be attributed to relatively minor variations in composition that lead to rather significant differences in microstructure. This review summarises technical information and practical experience on the manufacture and use of Grades 23 and 24 CSEF steels for power generation applications. Factors that influence the microstructure and strength of base metal are discussed for each alloy along with influences from common fabrication processes such as welding and bending. The results of this review provides manufacturers, fabricators and end users with information that can be applied to help ensure optimal performance of these steels in high-temperature applications associated with power generation.
“…Brozda and Pasternak 34 and Brózda 35 investigated the hardness and impact properties of simulated HAZs and actual welds in Grade 23. The HAZ simulations were conducted on both T23 and P23 steels consistent with a coarse-grained HAZ (CGHAZ).…”
Section: Mechanical Properties Of Weldsmentioning
confidence: 99%
“…Adapted from Brozda and Pasternak 34 and Brózda. 35 Note : 1250°C (2282°F) peak temperature, and cooling times from 800 to 500°C ( t 8/5 ) of 6, 24, 60 and 300 s. Impact specimens were sub-size (10 mm × 5 mm) 22 Impact strength and hardness values for simulated HAZs in P23 base material with peak temperature of 1250°C (2282°F). Adapted from Brozda and Pasternak 34 and Brózda.…”
Section: Review Of Grade 23mentioning
confidence: 99%
“…Impact strength and hardness values for simulated HAZs in T23 base material with peak temperature of 1250°C (2282°F). Adapted from Brozda and Pasternak 34 and Brózda 35. Note: 1250°C (2282°F) peak temperature, and cooling times from 800 to 500°C (t 8/5 ) of 6, 24, 60 and 300 s. Impact specimens were sub-size (10 mm × 5 mm) 24 Effect of aging time on hardness for T23 heat affect zone in the as-welded and PWHT conditions (750°C/2 h).…”
mentioning
confidence: 99%
“…Adapted from Mohyla and Foldyna36,37 23 Effect of PWHT on the Charpy impact toughness in the deposited weld metal and heat affect zone, as compared to P23 base material. Adapted from Brozda and Pasternak 34 and Brózda35 22 Impact strength and hardness values for simulated HAZs in P23 base material with peak temperature of 1250°C (2282°F). Adapted from Brozda and Pasternak 34 and Brózda 35.…”
mentioning
confidence: 99%
“…Adapted from Brozda and Pasternak 34 and Brózda35 22 Impact strength and hardness values for simulated HAZs in P23 base material with peak temperature of 1250°C (2282°F). Adapted from Brozda and Pasternak 34 and Brózda 35. Note: 1250°C (2282°F) peak temperature, and cooling times from 800 to 500°C (t 8/5 ) of 6, 24, 60 and 300 s. Impact specimens were full size (10 mm square)…”
Grades 23 and 24 creep strength enhanced ferritic (CSEF) steels are relatively new materials that have been designed with improved high-temperature strength compared to conventional 2.25Cr-1Mo alloys. These new steels share alloying strategies that were used in the past for CrMo derivatives such as the CrMoV steels. Grades 23 and 24 are often grouped with similar CSEF steels in terms of mechanical properties and fabrication characteristics. However, recent experience indicates that these alloys require more unique care to ensure adequate properties for the intended service in both the base metal and welds. The differences in behaviour between these new steels and more conventional CrMo steels can be attributed to relatively minor variations in composition that lead to rather significant differences in microstructure. This review summarises technical information and practical experience on the manufacture and use of Grades 23 and 24 CSEF steels for power generation applications. Factors that influence the microstructure and strength of base metal are discussed for each alloy along with influences from common fabrication processes such as welding and bending. The results of this review provides manufacturers, fabricators and end users with information that can be applied to help ensure optimal performance of these steels in high-temperature applications associated with power generation.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
