Bt. Timofeev et al., FRACTURE-TOUGHNESS OF 15X2HMFA STEEL AND ITS WELDS, International journal of pressure vessels and piping, 74(3), 1997, pp. 165-172
The generalized experimental fracture toughness results of industrial
semi-products, made from Cr-Ni-Mo-V steel and intended for VVER-1000 r
eactor pressure vessel manufacture, are presented. On the base of test
results of nine steel heats having a common purity (sulfur to 0.018%;
phosphorus to 0.015%; and copper to 0.20%) and of the same number of
heats having a higher purity (sulfur to 0.012%; phosphorus to 0.012%;
and copper to 0.06%) the fracture toughness temperature dependences we
re constructed. These differ appreciably from the reference curves for
this material according to PNAE G-7-002-86 The temperature dependence
s K-lc for 15X2HMFA steel welds were also obtained. By this, for welds
produced using manual are welding and the types RT-45A and RT-45B ele
ctrodes as well as electroslag welding with Sv-16X2HMFTA wire and OF-6
flux, these dependences were constructed on the limited number of wel
ded samples, as these welding methods are, practically, not used in th
e manufacture of such reactors. The fracture toughness assessment for
welds produced by submerged are welding was carried out for two varian
ts of production processing (Sv-10XGNMAA wire and AH-17M flux; Sv-08XG
HMTA wire and NF-18M flux), which were applied in the fabrication of c
ircumferential welds for a VVER-1000 reactor. (C) 1998 Published by El
sevier Science Limited. All rights reserved.