Q&A
About the Test Method
How do ASTM and ISO test methods differ?
The differences between the ASTM and ISO test methods are summarized below.
| Characteristics | ASTM Method | ISO method |
|---|---|---|
| 1. How to prepare injection molded test specimens | ||
| Mold Melting temperature (℃) Mold temperature (℃) Injection speed (mm/s) |
No standard mold |
1) Type A (dumbbell type) (2-cavity terminal gate) 2) Type B (rectangular) Size: 80 x 10 x 4? It is also possible to cut a dumbbell shape of terminal gate type A with 4 pieces and produce a rectangular shape of type B. 3) Family type A and type B may be used if they produce the same results. However, it is not suitable for creating test specimens for trial. 250 60 200±100 |
| 2. Izod impact strength | ||
| Test piece length (mm) Thickness (mm) Width (mm) |
60.30-63.50 12.70±0.15 March 17 to December 7 |
80±2 (63.5 possible) 10±0.2 4±0.2 |
| Notch Distance (mm) Tip radius (mm) 〃 Bevel angle (degrees) Remaining thickness (mm) |
31.50～32.20 0.25±0.05 (22.5±0.5) × 2 10.16±0.05 |
40±1 0.25±0.05 45±1 8±0.2 |
| Hammer lift angle Impact speed (m/s) |
A position that makes an angle between 60° and 30° with the horizontal (135°) Approx. 3.46 |
150° 3.5±10% |
| 3.Charpy impact strength | ||
| Test piece length (mm) Thickness (mm) Width (mm) |
124.50～127.00 12.70±0.15 March 17 to December 7 |
80±2 10±0.5 4±0.2 |
| Notch Distance (mm) Tip radius (mm) 〃 Bevel angle (degrees) Remaining thickness (mm) |
61.00～63.50 0.25±0.05 (22.5±0.5) × 2 10.16±0.05 |
40±1 0.25±0.05 (22.5±1) × 2 8±0.5 |
| Hammer lift angle Impact speed (m/s) |
A position that makes an angle between 60° and 30° with the horizontal (135°) Approx. 3.46 |
150° 2.9±10% (weighing weight 0.5 to 5J) 3.8±10% (weighing capacity 7.5 to 50 J) |
| 4. Rockwell hardness | ||
| Reference load (N{kgf}) Test load (N{kgf}) Indenter (steel ball) (mm) |
10kg R scale 60kg M scale 100kg R scale 12.700±0.0025 M scale 6.350±0.0025 |
98.07{10} R scale 588.4{60} M scale 980.7{100} R scale 12.700 M scale 6.350 |
| Load Speed (sec) Test load application time (sec) Reading time after removing test load (sec) |
4–5 15 15 |
4–5 15 15 |
| 5.Melt Flow Rate (MFR) | ||
| Cylinder inner diameter (mm) Piston head diameter (mm) |
9.5504±0.0076 9.4742±0.0076 |
9.500-10.000 0.075±0.015 smaller than the cylinder inner diameter The load needs to be adjusted according to the piston diameter. |
| Die Material Length (mm) Outer diameter (mm) Inner diameter (mm) |
Steel 8.000±0.025 Size that fits smoothly into the cylinder 2.0955±0.0051 |
Steel 8.000±0.025 9.50±0.03 2.095±0.005 |
| Measurement method Sample filling amount (g) Push-out distance (mm) |
B method (automatic time measurement method) 2.0-4.0 (MFR 3.5 or more) 4.0-8.0 (MFR 3.5 or less) 6.35±0.25 (MFR 10 or more) 25.4±0.25 (MFR 10≦) |
Method A (Manual Cutting Method) 4–5 (MFR 3.5 or greater) 6 to 8 (MFR 3.5 or less) |
| 6. Load temperature | ||
| Test piece length (mm) Thickness (mm) Width (mm) Support distance (mm) Specimen Orientation Deflection (mm) Heating rate (℃/min) Bending stress (MPa) |
127 3–13 13 100 Edgewise 0.25 2±0.2 1.820±2.5% Or, 0.455±2.5% |
80±2.0 120±10.0 4±0.2 3.0～4.2 10±0.2 9.8～15.0 64±1100±2 Flatwise Edgewise Thickness of the sample Width of the sampleMore different. Thickness 3.8～4.2 Width 9.8～15.0 Deflection 0.36 to 0.32 Deflection 0.33 to 0.21 120±10℃/h Method A 1.80, Method B 0.45 C Law 8.00 |
| 7. Vickers softening temperature | ||
| Test piece dimensions (mm) Thickness (mm) Indenter tip length (mm) Dimensions (mm) Penetration amount (mm) Heating rate (℃/h) Test load (N{kgf}) |
Width 12 or more 3 or more 5–12.5 1.143±0.025 January 50±5, 120±5 1000+40gf, -0gf |
Length and width 10 or more or φ10 or more 3–6.5 1±0.1 50±5K/h, 120±10K/h Method A 10±1{1.0±0.1} B method 50±5{5.1±0.5} |
| 8. Tensile properties h/span> | ||
|
Test piece dimensions (mm)
a3: Total length a1: Length of parallel section r: Radius
a2: Distance between wide portions b2: Width of wide portion b1: Width of narrow portion h: Thickness
L0: Gauge distance L: Initial grip distance |
Format I 165 (minimum) no max 57±0.5 76±1 －－－－－－－－－－－ 19±6.4 13±0.5 7 or less 50±0.25 115±5 |
1A type Over 150 80±2 20–25 104～113 20.0±0.2 10.0±0.2 4.0±0.2 50.0±0.5 115±1 |
Test piece diagram |
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| When measuring strength and elongation Test speed (mm/min) |
5±25% 50±10% 500±10% Among these, the standard of the test material or the value agreed upon between the parties. |
1) Set according to the test material specifications 2) 1±20% 2±20% 5±20% 10±20% 20±10% 50±10% 100±10% 200±10% 500±10% If there are no standards for the test materials, the parties will agree on a speed from among these. |
| 9. Flexural properties h/span> | ||
| Test piece length (mm) Thickness (mm) Width (mm) |
80 3.2 twenty five |
80.0±2.0 4.0±0.2 10.0±0.2 |
| Indenter radius of jig (mm) 〃 Radius of fulcrum (mm) Distance between supports (mm) |
3.2 or higher (up to 4 hours) 3.2 or more (when h≧3.2, up to 1.5h is possible) 50 |
5.0±0.1 5.0±0.2 (16±1)h |
| Test speed (mm/min) |
1.3 | 1) Set according to the test material specifications 2) 1±20% 2±20% 5±20% 10±20% 20±10% 50±10% 100±10% 200±10% 500±10% In the absence of a specification for the test material, set the strain rate as close to 1%/min as possible. Test speed producing deflection of 0.4h/min |
About making injection molds
| Test specimen | ISO requirements for production |
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