Reheat cracking susceptibility and toughness of 2% CrMoWVNb P23 steel welds

Pekka Nevasmaa, Jorma Salonen

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Abstract

This article is concerned with weldability of P23 pipe steel, with emphasis on reheat cracking sensitivity and toughness of simulated HAZs and thick-section multipass welds. The results demonstrate that the weld metal made using the B323 filler metal closely matching to P23 steel is far more critical than the parent steel HAZ. In the as-welded condition, the B323 weld metal exhibited excessive hardness of ≈ 380 HV and only diminutive Charpy toughness of ≈ 7 J at + 20 °C. Adoption of PWHT (760 °C /2 h) enhanced the weldment toughness; however, it also inevitably raises risk to reheat cracking in the weld metal that showed reduction of area (RA) no more than 2–3% in the BWI cracking test. The results show that thick-section multipass welds made using filler metal with the chemical composition closer to P24 grade material are less susceptible to reheat cracking than matching P23 grade welds.
Original languageEnglish
Pages (from-to)68 - 78
Number of pages11
JournalWelding in the World
Volume52
Issue number3-4
DOIs
Publication statusPublished - 2008
MoE publication typeA1 Journal article-refereed

Fingerprint

Steel
Toughness
Welds
Filler metals
Metals
Weldability
Steel pipe
Heat affected zone
Hardness
Chemical analysis

Keywords

  • creep
  • cracking
  • defects
  • high temperature
  • low alloy steels
  • mechanical properties
  • microstructure
  • multirun welding
  • reheat cracking
  • steels temperature
  • toughness
  • weldability

Cite this

@article{8367ab55695e4101a0dfa44d617ebc60,
title = "Reheat cracking susceptibility and toughness of 2{\%} CrMoWVNb P23 steel welds",
abstract = "This article is concerned with weldability of P23 pipe steel, with emphasis on reheat cracking sensitivity and toughness of simulated HAZs and thick-section multipass welds. The results demonstrate that the weld metal made using the B323 filler metal closely matching to P23 steel is far more critical than the parent steel HAZ. In the as-welded condition, the B323 weld metal exhibited excessive hardness of ≈ 380 HV and only diminutive Charpy toughness of ≈ 7 J at + 20 °C. Adoption of PWHT (760 °C /2 h) enhanced the weldment toughness; however, it also inevitably raises risk to reheat cracking in the weld metal that showed reduction of area (RA) no more than 2–3{\%} in the BWI cracking test. The results show that thick-section multipass welds made using filler metal with the chemical composition closer to P24 grade material are less susceptible to reheat cracking than matching P23 grade welds.",
keywords = "creep, cracking, defects, high temperature, low alloy steels, mechanical properties, microstructure, multirun welding, reheat cracking, steels temperature, toughness, weldability",
author = "Pekka Nevasmaa and Jorma Salonen",
year = "2008",
doi = "10.1007/BF03266633",
language = "English",
volume = "52",
pages = "68 -- 78",
journal = "Welding in the World",
issn = "0043-2288",
publisher = "Springer",
number = "3-4",

}

Reheat cracking susceptibility and toughness of 2% CrMoWVNb P23 steel welds. / Nevasmaa, Pekka; Salonen, Jorma.

In: Welding in the World, Vol. 52, No. 3-4, 2008, p. 68 - 78.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Reheat cracking susceptibility and toughness of 2% CrMoWVNb P23 steel welds

AU - Nevasmaa, Pekka

AU - Salonen, Jorma

PY - 2008

Y1 - 2008

N2 - This article is concerned with weldability of P23 pipe steel, with emphasis on reheat cracking sensitivity and toughness of simulated HAZs and thick-section multipass welds. The results demonstrate that the weld metal made using the B323 filler metal closely matching to P23 steel is far more critical than the parent steel HAZ. In the as-welded condition, the B323 weld metal exhibited excessive hardness of ≈ 380 HV and only diminutive Charpy toughness of ≈ 7 J at + 20 °C. Adoption of PWHT (760 °C /2 h) enhanced the weldment toughness; however, it also inevitably raises risk to reheat cracking in the weld metal that showed reduction of area (RA) no more than 2–3% in the BWI cracking test. The results show that thick-section multipass welds made using filler metal with the chemical composition closer to P24 grade material are less susceptible to reheat cracking than matching P23 grade welds.

AB - This article is concerned with weldability of P23 pipe steel, with emphasis on reheat cracking sensitivity and toughness of simulated HAZs and thick-section multipass welds. The results demonstrate that the weld metal made using the B323 filler metal closely matching to P23 steel is far more critical than the parent steel HAZ. In the as-welded condition, the B323 weld metal exhibited excessive hardness of ≈ 380 HV and only diminutive Charpy toughness of ≈ 7 J at + 20 °C. Adoption of PWHT (760 °C /2 h) enhanced the weldment toughness; however, it also inevitably raises risk to reheat cracking in the weld metal that showed reduction of area (RA) no more than 2–3% in the BWI cracking test. The results show that thick-section multipass welds made using filler metal with the chemical composition closer to P24 grade material are less susceptible to reheat cracking than matching P23 grade welds.

KW - creep

KW - cracking

KW - defects

KW - high temperature

KW - low alloy steels

KW - mechanical properties

KW - microstructure

KW - multirun welding

KW - reheat cracking

KW - steels temperature

KW - toughness

KW - weldability

U2 - 10.1007/BF03266633

DO - 10.1007/BF03266633

M3 - Article

VL - 52

SP - 68

EP - 78

JO - Welding in the World

JF - Welding in the World

SN - 0043-2288

IS - 3-4

ER -