Fracture Toughness Tests

Fracture Toughness Tests

For fracture toughness testing of materials and structural soundness estimation, JFE-TEC possesses state-of-the-art technologies based on fracture mechanics, and provides testing, analysis and evaluation services.

We can also perform various types of tests to evaluate crack destruction of materials in which cracks exist.

Outline of Tests

JFE-TEC can perform the following tests and evaluations.

Class Test name
Small-scale fracture toughness test Static crack initiation test KIC(KC, KJC) tests
JIC (JC) tests
CTODtests
Dynamic crack initiation test Dynamic KIC (KC, KJC) tests
Dynamic CTOD test
Crack arrest test CCA test
Large-scale fracture toughness test Wide plate tensile test
Large-scale drop weight test (drop weight tear test: DWTT) DWTT test
Structural soundness estimation  
Example of fracture toughness test using compact test specimen Example of fracture toughness test using compact test specimen

Public Standards Applied to Tests and Examples of Tests

Tests are performed in accordance with the following public standards.

Small-scale fracture toughness tests - Static crack initiation tests -

Test/evaluation technique Applicable standards Example of tests performed
KIC (KC, KJC) tests
JIC (JC) tests
CTOD tests
ISO 12737, 12135
ASTM E399, E1820, E1290, etc.
BS7448 Part 1, Part 2
WES1108, 1109
Steel plates for welded structures,
High strength steel plates (up to HT980) ,

Steel plates for pressure vessels (general, nuclear power),
Clad steel plates,
9% Ni steel plates,
Steel plates for offshore structures,
Extra-heavy steel plates for shipbuilding,
High strength linepipe materials,
Special materials (induction hardened materials, aluminum alloys, brass, etc.)

Small-scale fracture toughness tests - Dynamic crack initiation tests -

Test/evaluation technique Applicable standards Example of tests performed
Dynamic KIC (KC, KJC) tests
Dynamic CTOD tests
ASTM E399, E1820
BS7448 Part 3
Steel plates for welded structures,
Steel plates for pressure vessels,
Steel plates for naval use,
High strength linepipe materials

Small-scale fracture toughness tests - Crack arrest tests -

Test/evaluation technique Applicable standards Example of tests performed
CCA test ASTM E1221 Steel plates for pressure vessels,
Steel plates for shipbuilding

Large-scale fracture toughness tests

Test/evaluation technique Applicable standards Example of tests performed
Wide plate tensile test WES steel grade authorization test method
Materials from joint research with academic societies
Related literature
Extra-heavy steel plates for shipbuilding, 9%Ni steel plates

Large-scale drop weight test

Test/evaluation technique Applicable standards Example of tests performed
DWTT test API RP 5L3  

Structural Soundness Estimation

JFE-TEC performs commissioned structural soundness estimations in accordance with the following standards.

  • ASME Boiler & Pressure Vessel Code Sec. XI Appendix A
  • BS7910: Guide to Methods for Assessing the Acceptability of Flaws in Metallic Structures
  • API RP579: Fitness for Service
  • JSME S NA1: Codes for nuclear power generation facilities: Rules on fitness-for-service for nuclear power plants
  • WES2805: Method of assessment for flaws in fusion welded joints with respect to brittle fracture and fatigue crack growth
  • WES2808: Method of assessing brittle fracture in steel weldments subjected to large cyclic and dynamic strain
  • HPIS Z 101: Assessment Procedure for Crack-Like Flaws in Pressure Equipment

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