Slow Strain Speed and Stress Corrosion Testing Machine

1) testing and researching by constant speed test, lasting tensile test, constant loading creep test, corrosion fatigue test, corrosion stressed fracture compression test, corrosion crack growing test, crack extending test for material, component, part and metal, nonmetal, composite and alloy material under lasting stress and corrosion medium.

2) it is suitable for metal, pipe, component, (casing pipe, oil pipe, casing pipe of flat end, screened pipe, short joint, welding steel pipe, seamless steel pipe, underground pipe, condencer pipe, brass, aluminum alloy, stainless steel, steel, steel rope, high pressure gas cylinder, steel cylinder)

3) simulation environment(transport gas and oil, drilling well, logging well, repairing well, layer cracking, ocean, aviation, underground, mine.)

4) corrosion fatigue test, slow strain speed test, sulfide stress corrosion test, stress corrosion test, hydrogen induced cracking, slow strain speed and stress corrosion test, stress guiding hydrogen induced cracking test, metal average corrosion test for total immersion, anti-corrosion property test, electronic corrosion test, inter-granular corrosion test, crevice corrosion test, galvanic corrosion test.

2 Standard

1) ISO 7539-1:2012 Corrosion of metals and alloys -- Stress corrosion testing -- Part 1: General guidance on testing procedures

2) DIN EN ISO 7539-2 Corrosion of metals and alloys - Stress corrosion testing - Part 2: Preparation and use of bent-beam specimen

3) DIN EN ISO 7539-3Corrosion of metals and alloys - Stress corrosion testing - Part 3: Preparation and use of U-bend specimens 

4) DIN EN ISO 7539-4 Corrosion of metals and alloys - Stress corrosion testing - Part 4: Preparation and use of uni-axially loaded tension specimens

5) DIN EN ISO 7539-5 Corrosion of metals and alloys - Stress corrosion testing - Part 5: Preparation and use of C-ring specimens

6) DIN EN ISO 7539-6:2011Corrosion of metals and alloys - Stress corrosion testing - Part 6: Preparation and use of precracked specimens for tests under constant load or constant displacement 

7) DIN EN ISO 7539-7:2005Corrosion of metals and alloys - Stress corrosion testing - Part 7: Method for slow strain rate testing

8) DIN EN ISO 7539-8:2008 Corrosion of metals and alloys - Stress corrosion testing - Part 8: Preparation and use of specimens to evaluate weldments

9)DIN EN ISO 7539-9:2008 Corrosion of metals and alloys - Stress corrosion testing - Part 9: Preparation and use of pre-cracked specimens for tests under rising load or rising displacement

10) ISO 15156-2:2015 Petroleum and natural gas industries - Materials for use in H2S-containing environments in oil and gas production - Part 2: Cracking-resistant carbon and low-alloy steels, and the use of cast irons

11) NACE-TM0177-2016, Laboratory Testing of Metals for Resistance to Sulfide Stress Cracking and Stress Corrosion Cracking in H2S Environments

12) ANSI/NACE TM0284-2016, Evaluation of Pipeline and Pressure Vessel Steels for Resistance to Hydrogen-Induced Cracking

13) ANSI/NACE MR0175/ISO 15156, Petroleum and natural gas industries—Materials for use in H2S-containing environments in oil and gas production

14) NACE Store - TM0177-2016, Laboratory Testing of Metals for Resistance to Sulfide Stress Cracking and Stress Corrosion Cracking in H2S Environments

15) ASTM G31-72(2004) Standard Practice for Laboratory Immersion Corrosion Testing of Metals

16) ASTM G39-99(2016) Standard Practice for Preparation and Use of Bent-Beam Stress-Corrosion Test Specimens

3 specification

1) Max. loading: 10kN/20kN, 30kN/50kN, 100kN.

2) Grade of testing machine: Grade of 0.5 / 1

3) measuring range of loading:       0.4%～100%FS(grade of 0.5)/1%～100%FS(grade of1)

4) relative error of indicating value: Between ±0.5%(grade of 0.5)/±1.0%(grade of 1)

5) resolution of loading: 1/±300000FS(resolution is not changed in full stroke)

6) Measuring range of deformation: 0.2%～100% FS

7) adjusting range of loading speed: 0.005%～5%FS/S

8) control precision of loading speed:

When speed is ＜0.05%FS，between ±1% of set value,

When speed is 05%FS，between ±0.5% of set value

9) adjusting range of deformation speed:      0.005～5%FS/s

10) control precision of deformation speed:  

When speed is ＜0.05%FS/s，between ±1% of set value

When speed is ≥0.05%FS/s，between ±0.5% of set value

11) adjust range of displacement speed: 10-7～2mm/min

12) control precision of displacement speed: Between ±0.2% of set value

13) control range of constant  loading,deformation, displacement: 0.5%～100%FS

14) control precision for constant loading, deformation and displacement: 

When set value is ≥10%FS，between±0.5% of set value

When set value is ＜10%FS，between ±1% of set value

15) effective test span: 400mm, 400mm,500mm

16) moving stroke of transom:1000mm,1000mm,1200mm

17) stress corrosion environmental container        Anti–high temperature /sealing fully/prevention of leaking/prevention of volatilizing/temperature indicating/test for longtime/ high temperature300°