Astm B387
Astm B387
Astm B387
Copyright ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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B 387
TABLE 1 Chemical Requirements
Composition, %
Element Material Number
360 361 363 364 365 366
C 0.030 max 0.010 max 0.0100.030 0.0100.040 0.010 max 0.030 max
O, maxA 0.0015 0.0070 0.0030 0.030 0.0015 0.0025
N, maxA 0.002 0.002 0.002 0.002 0.002 0.002
Fe, max 0.010 0.010 0.010 0.010 0.010 0.010
Ni, max 0.002 0.005 0.002 0.005 0.002 0.002
Si, max 0.010 0.010 0.010 0.005 0.010 0.010
Ti ... ... 0.400.55 0.400.55 ... ...
W ... ... ... ... ... 2733
Zr ... ... 0.060.12 0.060.12 ... ...
Mo balance balance balance balance balance balance
A
Pending approved methods of analysis, deviations from these limits alone shall not be cause for rejection.
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B 387
TABLE 3 Mechanical Requirements for Round Bars and RodsA
Tensile Yield Elonga- Diamond Pyr-
Strength, Strength, tion in 1 amid Hard-
Type TemperB Diameter, in. (mm) min, ksi 0.2 % Off- in. (50 mm) ness (DPH),
(MPa) set, min, ksi min, % Vickers-10 kg
(MPa)
360, 361, 365 SR 0.020 to 18 (0.51 to 3.18), incl 85 (585) 65 (450) 15C ...
over 18 to 1332 (3.18 to 10.32) 75 (515) 55 (380) 15 ...
over 1332 to 78 (10.32 to 22.2) 90 (620) 75 (515) 18 230 to 280
over 78 to 118 (22.2 to 28.6) 85 (585) 70 (480) 15 225 to 270
over 118 to 178 (28.6 to 47.6) 75 (515) 65 (450) 10 215 to 260
over 178 to 278 (47.6 to 73.0) 70 (480) 60 (415) 10 210 to 250
over 278 to 312 (73.0 to 88.9) 65 (450) 55 (380) 10 205 to 240
363, 364 SR 316 to 78 (4.76 to 22.2), incl 115 (790) 100 (690) 18 260 to 320
over 78 to 118 (22.2 to 28.6) 110 (760) 95 (655) 15 250 to 310
over 118 to 178 (28.6 to 47.6) 100 (690) 85 (585) 10 245 to 300
over 178 to 278 (47.6 to 73.0) 90 (620) 80 (550) 10 240 to 290
over 278 to 312 (73.0 to 88.9) 85 (585) 75 (515) 5 235 to 285
TABLE 4 Permissible Variations in Diameter and Limits of Tolerance Out-of-Round for Rolled, Forged, Extruded, Swaged, or Drawn
Rounds (Descaled)
Permissible Variation, in. (mm)
Diameter, in. (mm) Diameter
Out-of-Round
+
0.020 to 116 (0.51 to 1.59) 0.001 (0.02) 0.001 (0.02) 0.001 (0.02)
Over 116 to 932 (1.59 to 7.14) 0.002 (0.05) 0.002 (0.05) 0.004 (0.10)
Over 932 to 1332 (7.14 to 10.32) 0.010 (0.25) 0.005 (0.13) 0.008 (0.20)
Over 1332 to 58 (10.32 to 15.9) 0.010 (0.25) 0.005 (0.13) 0.012 (0.30)
Over 58 to 78 (15.9 to 22.2) 0.015 (0.38) 0.005 (0.13) 0.015 (0.38)
Over 78 to 1 (22.2 to 25.4) 0.020 (0.51) 0.005 (0.13) 0.015 (0.38)
Over 1 to 138 (25.4 to 34.9) 0.020 (0.51) 0.010 (0.25) 0.018 (0.46)
Over 138 to 112 (34.9 to 38.1) 0.020 (0.51) 0.015 (0.38) 0.020 (0.51)
Over 112 to 158 (38.1 to 41.3) 0.025 (0.64) 0.015 (0.38) 0.020 (0.51)
Over 158 to 2 (41.3 to 50.8) 0.030 (0.76) 0.020 (0.51) 0.025 (0.64)
Over 2 to 212 (50.8 to 63.5) 0.032 (0.81) 0.032 (0.81) 0.025 (0.64)
Over 212 to 314 (63.5 to 82.6) 0.032 (0.81) 0.032 (0.81) 0.027 (0.69)
Over 314 to 312(82.6 to 88.9) 0.045 (1.14) 0.045 (1.14) 0.040 (1.02)
Centerless Ground Rounds
116 to 12 (1.58 to 12.7) 0.002 (0.05) 0.002 (0.05) ...
Over 12 (12.7) 0.003 (0.08) 0.003 (0.08) ...
otherwise specified, rejected material may be returned to the heat or powder lot to determine properties required in Sections
manufacturer at the manufacturers expense unless the pur- 7.1 and 8.
chaser receives, within three weeks of notice of rejection, other 14.2 The report shall include the purchase order number,
instructions for disposition. heat number, this specification number, and quantity and
number of items covered by shipment.
14. Certification
14.1 If requested, the manufacturer shall supply at least 15. Product Marking
three copies of a report of the chemical analysis of each heat 15.1 Each bar, rod, bundle, box, coil, or spool shall be
(Types 360, 363, 365, and 366) or powder metallurgy product legibly and conspicuously marked or tagged with the number
from the powder lot (Types 361 and 364) represented in the of this specification, heat or lot number, manufacturers iden-
shipment, and reports of the result of tests of each size of each tification, type, temper, and nominal size.
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B 387
16. Packaging and Package Marking 17. Keywords
16.1 Unless otherwise specified, material purchased under 17.1 molybdenum; molybdenum alloy bar; molybdenum
this specification must be packaged by box or other suitable alloy rod; molybdenum alloy wire
protective containers and should be so marked as to indicate
the nature of any special handling required.
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