EN 10243-1 PDF

Gam They apply within the limits stated below unless the purchaser specifies otherwise. To avoid extra expense, is essential that all the dimensions be admitted into forging grade F. The residual flash is measured from the body of the forging to the trimmed edge of the flash, as indicated in Figure In such cases, special tolerances shall be negotiated with the purchaser before the commencement of production. These are dimensions which would lead to over definition geometrically, or contradictions when given a tolerance. EN The shape complexity factor of a forging is the ratio of the mass of the to the mass1 of the enveloping shape necessary to accommodate the maximum dimensions of the forging: Straightness and flatness tolerances are to be found from Table 5 according to the greatest length or greatest width dimension of the forging.

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Gam They apply within the limits stated below unless the purchaser specifies otherwise. To avoid extra expense, is essential that all the dimensions be admitted into forging grade F.

The residual flash is measured from the body of the forging to the trimmed edge of the flash, as indicated in Figure In such cases, special tolerances shall be negotiated with the purchaser before the commencement of production.

These are dimensions which would lead to over definition geometrically, or contradictions when given a tolerance. EN The shape complexity factor of a forging is the ratio of the mass of the to the mass1 of the enveloping shape necessary to accommodate the maximum dimensions of the forging: Straightness and flatness tolerances are to be found from Table 5 according to the greatest length or greatest width dimension of the forging.

The horizontal line is then followed to the right. The permissible length of local deviation from the bar stock diameter or section adjoining a forged portion shall be up to 1,5 times the bar stock diameter or largest cross-sectional dimension, but with a maximum value of mm see Figure Drop and vertical press forgingsrgees par estampage en acier es dimensionnelles Pieces executees a chaud sur x-pilons ou presses verticalesGesenkschmiedeteile aus Stahl MatoTeil 1: The supplier will draw the attention of the purchaser to such instances and it will be necessary to negotiate greater tolerances on the draft angle surfaces to meet these circumstances.

This European does not apply to upset forgings made on horizontal forging machines see EN Mismatch tolerances are applied independently of any other tolerances. Tolerances for the maximum permissible extent of burr relative such edges are based on the weight of the forging, in accordance with Table 6 and are applied unless the purchaser specifies otherwise. For dimensions from a centre to a surface see Figure 9 and for dimensions on steps within one die, the tolerances for the greatest length, width and height shall apply wherever possible.

Above 0,16 up to and including 0,32; S2: See also Figure Length, width and enn tolerances are shown in Table 1 and Table 2 as applied to dimensions between external surfaces see Figure 7i. Tolerances for fillet and edge radii shown in Table 6 are applicable to grade E and grade F.

A version in any other made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the English versionSteel die forgings Tolerances on dimensions Part 1: Examples are shown of circular and non-circular forgings wn Figure 2 and Figure 3.

The centre-to-centre tolerances provided in this standard apply only when a straight line joining the two centres occurs within the profile of the forging see Figure Up to and including 0,16;S3: Deviations of straightness or flatness as given in Table 5 are not included in the above-mentioned faults of form.

The application of such tolerances should be kept to a minimum and, in these instances, the tolerances shall be indicated clearly against the appropriate dimension s on the forging drawing.

Such requirements usually necessitate supplementary operations, e. Take the smart route to manage medical device compliance. In such cases the factor S4 is used; the weight to be taken into consideration is only that of a cylinder having d and height e.

When tolerances for sheared ends are required, this will be indicated to the purchaser on the forging drawing before the commencement of production.

On forged surfaces which are not machined subsequently, scale pits and surface dressing shall be permitted to a depth equal to one-third of the total value of the thickness tolerance. While grade E close tolerances may be applied to all dimensions on one forging, it is more economical to apply them only enn those specific dimensions on which closer tolerances are essential.

S3Type of steel used: These two grades of tolerances are identified as follows: This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. The faster, easier way to work with standards. Learn more about the cookies we use and how to change your settings.

They shall be taken from Table 1 and Table 2. The nominal diameter and the location of ejector marks will be indicated to the purchaser on the forging drawing before the commencement of production. The minus tolerances do not apply to edge radii up to and including 3 mm when such radii are affected by subsequent removal of draft by trimming or punching.

H7CR BVG PDF This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by Marchand conflicting national standards shall be withdrawn at the latest by March Normally the tolerances for the greatest dimension of length or diameter of the forging will be applied but, if more restrictive tolerances are required, those for the specific dimension of the pierced hole may be used.

BS EN — Steel die forgings. Tolerances on dimensions. Drop and vertical press forgings For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision.

As a general rule grade F tolerances result in a cheaper forged component. Instances occur in which this tolerance is inadequate. ISO 3, Preferred numbers Series of preferred numbers.

Where restrictions in deviations of form have been agreed, these will be to ISO and noted on the drawing. The weight of the total length in question shall be calculated as if of unforged stock, irrespective of whether this is the case or not. All variations in thickness, due to die-closure, die-wear and shrinkage are included in the thickness tolerances.

Ej measuring mismatch, accuracy depends upon making due allowance for surplus metal caused by uneven die wear. On forged surfaces which are to be machined subsequently, scale pits and surface dressing shall be permitted, but the maximum depth shall be such that at least one-half of the nominal machining allowance remains. Eccentricity tolerances for deep holes shall be applied in addition to the normal tolerances for mismatch see Figure When no tolerance is indicated against the dimension concerned, the tolerance for the maximum length or width of the forging shall be applied from Table 1 or Table 2but the dispersion will be plus and minus one-half of the total tolerance, and not as shown in the tables.

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Brasida The weight of the total length in question shall be calculated as if of unforged stock, irrespective of whether this is the case or not. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, don the latest ej Marchand conflicting national standards shall be withdrawn at the latest by March All forgings bear the CDP identification mark, unless a different 1 Documents. Base all thickness tolerances except those for overall thickness on dimension t shown above. The nominal diameter and the location of ejector marks will be indicated to the purchaser on the forging drawing before the commencement of production. If the category of steel used is M2, the heavy diagonal line is followed downward to the point of intersection with the vertical line M2 and the horizontal line thus met is followed to the right i. In both cases, the permissible deviations shall be mentioned besides the relative measurements in the drawings of the forgings. If the category of steel used is the same horizontal line is followed further to the right.

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EN 10243-1 PDF

This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 34, an inside back cover and a back cover.

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