Tensile Testing Lab

Reference Materials

• ASTM E8/E8M-13 Standard Test Methods for Tension Testing of Metallic Materials
• Tensile Testing (ASM Handbook)

Lab Report Sample

• Rules for this report:
  • Do NOT include raw data in report
  • ALWAYS INDICATE UNITS
  • Summarize the data recommended by ASTM E8 – YOU WILL NEED TO LOOK IT UP.
  • Indicate if any data points are outliers and are removed
  • Show what calculations you used.
  • Show UTS on a graph
  • Show .2% Offset Yield on graph
  • Show Modulus of Elasticity on a graph
  • “Some speak and write as if they wanted to say something: others as if they had something to say.” — Archbishop Richard Whately

Equipment

• Tinius Olsen universal testing machine

Tinius Olsen Extensometer

Dial Calipers

DATA

LINK TO Raw Data – (Do not include raw data in report)

Gauge Length is 50.0 mm long
Hardness 92 Rb
Specimen Diameter is 6.37 mm (Final Diameter: 4.69)
Material is AISI 4130 Normalized Steel
Crosshead Speed: 2 mm/min
Peak Load: 21.3 kN
Fracture was cup and cone

See also:

http://www.tiniusolsen.com/pdf/Pamphlet4.pdf

Hint for getting your stress units to MPa:

• First, know that a pascal is one N/m2.
• Remember that to convert Pascals to MPa you divide by 1 million.
• Notice you can do this with the units.
  • 1 square meter has 1 million sq mm
• So 1 MPa could be 1 million N/m2 or one N/mm2
• Now see that your are given kN/mm2.
• All you need to do is to get to our “new” definition of MPa is multiply by 1000.
• If you do this with the units, you wind up with N/mm2 which is the same as MPa.

HINT: to swap columns on scatter diagram:

1. Right click on either axis.
2. Click “Select Data.”
3. Click “edit.”
4. Swap column designations.