Astm b127 (Monel 400) | PDF | Rolling (Metalworking)

for material 1 in. (25.4 mm) or over in width and at any place on the strip under 1 in. in width.

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Width or Diameter

7.2.1 Plate —The permissible variations in width of rectangular plates and diameter of circular plates shall be as prescribed in Table 8 and Table 9.

7.2.2 Sheet and Strip —The permissible variations in width for sheet and strip shall be as prescribed in Table 10.

7.3 Length: Sheet and strip of all sizes may be ordered to cut lengths in which case, a variation of:

1/8 in. (3.2 mm) over the specified length shall be permitted. Permissible variations in length of rectangular plate shall be as prescribed in Table 11.

7.4.1 Straightness: The edgewise curvature (depth of chord) of flat sheet, strip, and plate shall not exceed 0.05 in. multiplied by the length in feet (0.04 mm multiplied by the length in centimeters).

7.4.2 Straightness for coiled material is subject to agreement between the manufacturer and the purchaser.

7.5 Edges:

7.5.1.1 When finished edges of strip are specified in the contract or purchase order, the following descriptions shall apply:

Square-edge strip shall be supplied with finished edges, sharp, square corners, and without bevel or rounding.

TABLE 4 Grain Size and Hardness for Cold-Rolled, Deep-Drawing, and Spinning Quality Sheet and Strip

Thickness, in. (mm)

Calculated Diameter of Average Grain Section, max Corresponding ASTM Micro-Grain Size No. Rockwell B Hardness, max mm in.

Sheet (56 in. (1420 mm) Wide and Under)

0.050 (1.3) and under 0.0030 4.5 76

Over 0.050 to 0.250 (1.3 to 6.4), incl 0.0043 3.5 76

Strip (12 in. (305 mm) Wide and Under)

0.005 to 0.015 (0.13 to 0.38), incl 0.0022 0.0009 8

Over 0.015 to 0.024 (0.38 to 0.61), incl 0.0060 0.0024 5.5 76

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Over 0.024 to 0.125 (0.61 to 3.2), incl 0.0075 0.0030 4.5 76

Accurate grain size and hardness determinations are difficult to make on strip under 0.005 in. (0.13 mm) in thickness and are not recommended.

TABLE 5 Permissible Variations in Thickness and Overweight of Rectangular Plates

NOTE 1—All plates shall be ordered to thickness and not to weight per square foot. No plates shall vary more than 0.01 in. (0.3 mm) under the thickness ordered, and the overweight of each lot in each shipment shall not exceed the amount given in the table. Spot grinding is permitted to remove surface imperfections, such spots not to exceed 0.01 in. (0.3 mm) under the specified thickness.

Specified Thickness, in. (mm) Permissible Excess in Average Weight, per Square Foot of Plates for Widths Given in Inches (Millimetres) Expressed in Percentage of Nominal Weights Under 48 (1220) 48 to 60 (1220 to 1520), excl 60 to 72 (1520 to 1830), excl 72 to 84 (1830 to 2130), excl 84 to 96 (2130 to 2440), excl 96 to 108 (2440 to 2740), excl 108 to 120 (2740 to 3050), excl 120 to 132 (3050 to 3350), excl 132 to 144 (3350 to 3660), excl 144 to 160 (3660 to 4070), incl

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