# PRODUCT DATA SHEET

## Acetron $ ^{\textcircled{R}} $ C Sterra $ ^{ \mathrm{T M}} $ POM-C

Polyoxymethylene

Acetron $ ^{\mathrm{R}} $ C Sterra $ ^{\mathrm{TM}} $ Polyoxymethylene POM-C is a general purpose, copolymer acetal grade that is often favored for its porosity free nature. Acetron $ ^{\mathrm{R}} $ C Sterra $ ^{\mathrm{TM}} $ POM-C shapes also offer low moisture and excellent machinability capabilities, making it a very versatile material that can excel in a multitude of environments. As part of the Sterra $ ^{\mathrm{TM}} $ product portfolio, this material contains recycled content and exhibits a significantly lower carbon footprint compared to similar materials derived from non-recycled feedstocks. For details, please refer to the respective environmental data sheet.

|  |  | ISO |  |  |  |
| --- | --- | --- | --- | --- | --- |
|  |  | Test methods | Units | Indicative Values |  |
| Thermal Properties(1) | Melting temperature(DSC,10℃(50°F)/min) | ISO 11357-1/3 | ℃ | 165 |  |
| Thermal Properties(1) | Glass transition temperature(DMA,tan delta) | DMA | ℃ | - |  |
| Thermal Properties(1) | Thermal conductivity at23℃(73°F) | - | W/(K.m) | 0.31 |  |
| Thermal Properties(1) | Coefficient of linear thermal expansion(-40 to 150℃)(-40 to 300℃) |  |  |  |  |
| Thermal Properties(1) | Coefficient of linear thermal expansion(23 to 60℃)(73°F to 140℃) | - | μm/(m.K) | 110 |  |
| Thermal Properties(1) | Coefficient of linear thermal expansion(23 to 100℃)(73°F to 210℃) | - | μm/(m.K) | 125 |  |
| Thermal Properties(1) | Heat Deflection Temperature:methodA:1.8MPa(264PSI) | ISO 75-1/-2 | ℃ | 100 |  |
| Thermal Properties(1) | Continuous allowable service temperature in air(20.000hrs)(3) | - | ℃ | 100 |  |
| Thermal Properties(1) | Min.service temperature(4) | - | ℃ | -50 |  |
| Thermal Properties(1) | Flammability:UL94(3mm(1/8in.))(5) | - | - | HB |  |
| Thermal Properties(1) | Flammability:Oxygen Index | ISO4589-1/-2 | % | 15 |  |
| Thermal Properties(1) | Mechanical Properties(6) | Tensile strength | ISO527-1/-2(7) | MPa | 66 |
| Thermal Properties(1) | Mechanical Properties(6) | Tensile strain(elongation)at yield | ISO527-1/-2(7) | % | 15.00 |
| Thermal Properties(1) | Mechanical Properties(6) | Tensile strain(elongation)at break | ISO527-1/-2(7) | % | 40 |
| Tensile modulus of elasticity | Mechanical Properties(6) | ISO527-1/-2(9) | MPa | 3,000 |  |
| Shear Strength | Mechanical Properties(6) | ASTM D732 | MPa | 55 |  |
| Compressive stress at1/2/5% nominal strain | Mechanical Properties(6) | ISO604(10) | MPa | 23/40/72 |  |
| Compressive strength | Mechanical Properties(6) |  |  |  |  |
| Charpy impact strength - unnotched | Mechanical Properties(6) | ISO179-1/1eU | kJ/m² | no break |  |
| Charpy impact strength - notched | Mechanical Properties(6) | ISO179-1/1eA | kJ/m² | 8.0 |  |
| Izod Impact notched | Mechanical Properties(6) |  |  |  |  |
| Electrical Properties | Mechanical Properties(6) | Flexural strength | ISO178(12) | MPa | 91 |
| Electrical Properties | Mechanical Properties(6) | Flexural modulus of elasticity | ISO178(12) | MPa | 2,660 |
| Electrical Properties | Rockwell M hardness(14) | ISO2039-2 | - | 84 |  |
| Electrical Properties | Shore hardnessD(14) | ISO868 | - | 79 |  |
| Electrical Properties | Electric strength | IEC60243-1(15) | kV/mm | 20 |  |
| Electrical Properties | Electric strength | Volume resistivity | IEC62631-3-1 | Ohm.cm | 10E13 |
| Miscellaneous | Surface resistivity | ANSI/ESD STM11.11 | Ohm/sq. | 10E12 |  |
| Miscellaneous | Dielectric constant at1MHz | IEC62631-2-1 | - | 3.80 |  |
| Miscellaneous | Dissipation factor at1MHz | IEC62631-2-1 | - | 0.0080 |  |
| Miscellaneous | Colour | - | - | Black |  |
| Miscellaneous | Density | ISO1183-1 | g/cm³ | 1.41 |  |
| Miscellaneous | Miscellaneous | Specific Gravity |  |  |  |
| Water absorption after24himmersion in water of23℃(73°F) | Miscellaneous | ISO62(16) | % | 0.24 |  |
| Water absorption at saturation in water of23℃(73°F) | Miscellaneous | - | % | 0.80 |  |
| Wear rate | Miscellaneous | ISO7148-2(18) | μm/km | 45.00 |  |
| Dynamic Coefficient of Friction(-) | Miscellaneous | ISO7148-2(18) | - | 0.3-0.45 |  |
| Limiting PV at100FPM | Miscellaneous |  |  |  |  |
| LimitingPV at0.1/1m/s cylindrical sleeve bearings | Miscellaneous | - | Mpa.m/s | 0.16/0.10 |  |
| Chemical Resistance | https://www.ncam.com/en/support/chemical-resistance-information/ |  |  |  |  |

**Note:** 1 g/cm<sup>3</sup> = 1,000 kg/m<sup>3</sup> ; 1 MPa = 1 N/mm<sup>2</sup> ; 1 kV/mm = 1 MV/m

**NYP:** there is no yield point

| Test methods | Units | Indicative Values |
| --- | --- | --- |
| ASTM D3418 | °F | 335 |
| DMA | °F | - |
| - | BTU in./(hr.ft2.1F) | 1.6 |
| ASTM E-831(TMA) | μin./in./°F | 54 |
|  |  |  |
|  |  |  |
| ASTM D648 | °F | 220 |
| - | °F | 180 |
| - | °F | - |
| - | - | HB |
|  |  |  |
| ASTM D638(8) | PSI | 9,500 |
| ASTM D638(8) | % | 11.00 |
| ASTM D638(8) | % | 40 |
| ASTM D638(8) | KSI | 400 |
| ASTM D732 | PSI | 8,000 |
|  |  |  |
| ASTM D695(11) | PSI | 13,500 |
|  |  |  |
|  |  |  |
| ASTM D256 | ft.lb./in | 1.00 |
| ASTM D790(13) | PSI | 12,000 |
| ASTM D790 | KSI | 400 |
| ASTM D785 | - | 88 |
| ASTM D2240 | - | 85 |
|  |  |  |
| ASTM D149 | Volts/mil | 420 |
| IEC 60093 | Ohm.cm |  |
| ANSI/ESD STM 11.11 | Ohm/sq. | 10E12 |
| ASTM D150 | - | 3.80 |
| ASTM D150 | - | 0.0050 |
|  | - | Black |
|  |  |  |
| ASTM D792 | - | 1.41 |
| ASTM D570(17) | % | 0.20 |
| ASTM D570(17) | % | 0.9 |
| QTM 55010(19) | ln2.min/fL.bss.hrx10^{10}$ | 200.00 |
| QTM 55007(20) | - | 0.25 |
| QTM 55007(21) | ft.lbs/in2.min | 2,700 |
|  |  |  |

This table, mainly to be used for comparison purposes, is a valuable help in the choice of a material. The data listed here fall within the normal range of product properties of dry material. However, they are not guaranteed and they should not be used to establish material specification limits nor used alone as the basis of design. See the remaining notes on the next page.

Acetron $ ^{\mathrm{TM}} $ C Sterra POM-C is a registered trademark of Mitsubishi Chemical Advanced Materials.

---

## NOTES, SEE DATASHEET ON PAGE 1

-1 The figures given for these properties are for the most part derived from raw material supplier data and other publications.

-2 Values for this property are only given here for amorphous materials and for materials that do not show a melting temperature (PBI, PAI & PI). DMA settings, oscillation amplitude of 0.20 mm; a frequency of 1 Hz; heating rate of $ 2^{C}/C/min $.

-3 Temperature resistance over a period of min. 20,000 hours. After this period of time, there is a decrease in tensile strength - measured at $ 2 3 C $ （ $ 7 3^{F} $ ）of about 50% as compared with the original value. The temperature value given here is thus based on the thermal-oxidative degradation which takes place and causes a reduction in properties. Note, however, that the maximum allowable service temperature depends in many cases essentially on the duration and the magnitude of the mechanical stresses to which the material is subjected.

-4 Impact strength decreasing with decreasing temperature, the minimum allowable service temperature is practically mainly determined by the extent to which the material is subjected to impact. The value given here is based on unfavourable impact conditions and may consequently not be considered as being the absolute practical limit.

-5 These estimated ratings, derived from raw material supplier data and other publications, are not intended to reflect hazards presented by the material under actual fire conditions. There is no 'UL File Number' available for these stock shapes.

-6 Most of the figures given for the mechanical properties are average values of tests run on dry test specimens machined out of rods 40-50 mm (1.5 - 2" ) when available, else out of plate 10-20mm (0.4 - 0.8"). All tests are done at room temperature $ \left( 23^{\circ}\mathrm{F} \right) / \left( 73^{\circ}\mathrm{F} \right) $.

-7 Test speed: either 5 mm/min or 50 mm/min [chosen acc. to ISO 10350-1 as a function of the ductile behaviour of the material (tough or brittle)] using type 1B tensile bars.

-8 Test speed: either 0.2"/min or 2"/min or [chosen as a function of the ductile behavior of the material (brittle or tough)] using Type 1 tensile bars.

-9 Test speed: 1 mm/min, using type 1B tensile bars.

-10 Test specimens: cylinders $ \varnothing $ 8 mm x 16 mm, test speed 1 mm/min.

-11 Test specimens: cylinders $ \varnothing $ 8 mm x 16 mm, test speed 1 mm/min.

-12 Test specimens: bars 4 mm (thickness) x 10 mm x 80 mm; test speed: 2 mm/min; span: 64 mm.

-13 Test specimens: bars 0.25" (thickness) x 0.5" x 5"; test speed: 0.11"/min; span: 4".

-14 Measured on 10 mm, 0.4" thick test specimens.

-15 Electrode configuration: $ \varnothing 25 / \varnothing 75 $ mm coaxial cylinders; in transformer oil according to IEC 60296; 1 mm thick test specimens.

-16 Measured on discs $ \varnothing $ 50 mm x 3 mm.

-17 Measured on 1/8" thick x 2" diameter or square.

-18 Test procedure similar to Test Method A: "Pin-on-disk" as described in ISO7148-2, Load 3MPa, sliding velocity= 0.33 m/s, mating plate steel Ra= 0.7-0.9 $ \mu\mathrm{m} $, tested at $ 23^{\circ}\mathrm{C} $ 50%RH.

-19 Test using journal bearing system, 200 hrs, 118 ft/min, 42 PSI, steel shaft roughness $ 16\pm2 $ RMS micro inches with Hardness Brinell of 180-200.

-20 Test using Plastic Thrust Washer rotating against steel, 20 ft/min and 250 PSI, Stationary steel washer roughness $ 16\pm2 $ RMS micro inches with Rockwell C 20-24.

-21 Test using Plastic Thrust Washer rotating against steel, Step by step increase pressure, Test ends when plastic begins to deform or if temperature increases to $ 300^{\circ} \mathrm{F}. $

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