Material: cast iron plate with HT200-300 casting, material ingredients when the raw material content plus ingredients as follows (%): carbon content: 3.1-3.4, manganese: 0.6-0.9, silicon: 1.5-2.0, sulfur <0.12, 0.3. Hardness> 180, secondary tempering treatment.

Small cast iron plate appearance and surface quality Requirements: The plane should have three fulcrums (for the size of 750 × 1000 mm and above the plate allows four and more than four fulcrum.) For the inspection of the plate should have the accuracy grade and product number. , Repair to sharp edges burr and painted with paint.

The surface of the cast iron platform shall not have any defects such as rust, nicks, cracks, pits, trachoma, impurity and other defects affecting the measurement accuracy.

Small cast iron plate test method: visual observation and test, the surface of the surface finish requirements: non-scratching the new system and repair of the plate should be in three different parts of the surface surface finish test.

Verification method: Compared with the surface finish process template or with a profiler test side angle requirements: between each side and between the side and the face of the angle should be within 90o ± 10 '.

The contact point of the scraper plate requirements: the new system and the repair after the scratch plate application of color test method of contact with the spot, the length of 25 mm in the square of the number of spots and any two square within the difference between the number of spots Should be more than the national standard shall be specified from the edge of the flat face 5 mm within the number of spots do not have to calculate.

Test method: size is less than or equal to 400 × 400 mm was 0 flat with 'three sides of each other' test method, the size is greater than 400 × 400 mm was 0 flat plate allows 0 flat or 0 flat foot test, The edge dimension shall not be less than half the diagonal length of the plate to be inspected, and the length of the flat foot shall be not less than the diagonal length of the plate to be inspected.

Iron plate surface roughness requirements: for the size of the millennium to 1000 mm, 5 mm from the edge of the face and the size of more than 1000 mm flat plate, 10 mm from the edge of the face at the edge of the roughness can not be calculated.

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2. About size GB standard gauges I have a spot with the director, received orders, 72 hours of delivery; non-standard measuring tool can be customized, the production period is short, please rest assured purchase.

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5. On the delivery Products are wooden packaging, non-customized products single 50kg following products made ordinary courier, usually within 72 hours of arrival; single 50kg or more products using logistics and distribution, your city has a direct line of preference, remote or small towns are The general arrival time is 4-7 days. Delivery costs to the logistics company's actual offer, subject to the sale of merchandise shops are not included in the transport costs. If you special requirements of courier, air and railway express themselves shipping fee.