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HOT ROLLED ALLOY BARS SIZE TOLERANCES AND OUT-OF-ROUND OR OUT-OF SQUARE TOLERANCES Hot Rolled Alloy Bars Round, Square, and Round-Cornered Square Size Tolerances (inches) Out-of-Round or Out-of-Square Specified Sizes (inches) Over Under Section (inches) Up thru 5/16 0.005 0.005 0.008 Over 5/16 thru 7/16 0.006 0.006 0.009 Over 7/16 thru 5/8 0.007 0.007 0.010 Over 5/8 thru 7/8 0.008 0.008 0.012 Over 7/8 thru 1 0.009 0.009 0.013 Over 1 thru 1-1/8 0.010 0.010 0.015 Over 1-1/8 thru 1-1/4 0.011 0.011 0.016 Over 1-1/4 thru 1-3/8 0.012 0.012 0.018 Over 1-3/8 thru 1-1/2 0.014 0.014 0.021 Over 1-1/2 thru 2 1/64 1/64 0.023 Over 2 thru 2-1/2 1/32 0 0.023 Over 2-1/2 thru 3-1/2 3/64 0 0.035 Over 3-1/2 thru 4-1/2 1/16 0 0.046 Over 4-1/2 thru 5-1/2 5/64 0 0.058 Over 5-1/2 thru 6-1/2 1/8 0 0.070 Over 6-1/2 thru 8-1/4 5/32 0 0.085 Over 8-1/4 thru 9-1/2 3/16 0 0.100 Over 9-1/2 1/4 0 0.120 Out-of-round is the difference between the maximum and minimum diameters of the bar, measured at the same transverse cross section. Out-of-square section is the difference in perpendicular distance between opposite faces, measured at the same transverse cross section. SIZE TOLERANCES - ROUNDS Turned & Ground/Turned, Ground & Polished Diameter Not Heat Treated Heat Treated Range (inches) All Carbons All Carbons Up thru 1-1/2 +0 - 0.001 +0 - 0.001 Over 1-1/2 thru 2-1/2 +0 - 0.0015 +0 - 0.0015 Over 2-1/2 thru 3 +0 - 0.002 +0 - 0.002 Over 3 thru 4 +0 - 0.003 +0 - 0.003 Over 4 thru 6 +0 - 0.004 +0 - 0.005 Over 6 +0 - 0.005 +0 - 0.006 DCF THICKNESS & WIDTH OVERSIZE RANGES Thickness 1/2" thru 3-3/4"............... +0.015 to +0.090 on width Thickness over 4"............................ +0.062 to +0.125 on width Thickness........................................ +0.015 to +0.035 oversize thru 4" ........................................................ +0.060 to +0.156 over 4" 8-34
THICKNESS TOLERANCES 4140 HRA and 8620 HR FLATS ALL WIDTHS RANGE FROM .035 - .124 OVERSIZE Thickness (inches) Tolerance 3/8...................................................................... +.03 -.01 1/2...................................................................... +.03 -.01 5/8...................................................................... +.04 -.01 3/4 and 7/8......................................................... +.04 -.01 1 to 1-7/8............................................................ +.07 -.01 2 to 2-3/4.............................................................+.11 -.01 3 to 3-3/4............................................................ +.13 -.01 4 to 4-1/2............................................................ +.15 -.01 STANDARD MANUFACTURING TOLERANCES COLD FINISHED ALLOY BARS UNDERSIZE VARIATION IN INCHES Size & Shape Carbon thru .28% Max. Max. Carbon Over .28% thru .55% Max. Carbon Over .55% Or All Carbons Heat Treated E.T.D. 150 ® ROUNDS (Cold Drawn Or Turned & Polished) Up thru 1-1/2 .003 .004 .006 .005 Over 1-1/2 thru 2-1/2 .004 .005 .007 .006 Over 2-1/2 thru 4 .005 .006 .008 .007 Over 4 thru 6 .006 .007 .009 Over 6 thru 8 .007 .008 .010 Over 8 thru 9 .008 .009 .011 HEXAGONS Up thru 3/4 .003 .004 .007 Over 3/4 thru 1-1/2 .004 .005 .008 Over 1-1/2 thru 2-1/2 .005 .006 .009 Over 2-1/2 thru 3-1/8 .006 .007 .010 SQUARES Up thru 3/4 .003 .005 .008 Over 3/4 thru 1-1/2 .004 .006 .009 Over 1-1/2 thru 2-1/2 .005 .007 .010 Over 2-1/2 thru 3-1/8 .007 .009 .012 FLATS (Width) Up thru 3/4 .004 .006 .009 Over 3/4 thru 1-1/2 .005 .007 .011 Over 1-1/2 thru 3 .006 .008 .013 Over 3 thru 4 .007 .010 .017 Over 4 thru 6 .009 .012 .021 Over 6 .014 . . . . . . . . • Tolerances for flats apply to thickness as well as to width. 8-35
Page 1 and 2: Alloys ETD 150 ® .................
Page 3 and 4: AISI 4140/41L40 - ANNEALED HR/CF (A
Page 5 and 6: AISI 4140 - ANNEALED FLATS AND SQUA
Page 7 and 8: AISI 4140 Q&T (HOT ROLLED, QUENCHED
Page 9 and 10: AISI 4140 QUENCHED & TEMPERED ROUND
Page 11 and 12: AISI 4140/4142 - (MOD) DCF MEDIUM C
Page 13 and 14: AISI 4140/4142 - (MOD) FLATS AND SQ
Page 15 and 16: AISI 4140 - AS ROLLED PLATE ALSO AV
Page 17 and 18: AISI 4150R Q&T SR HR (RESULPHURIZED
Page 19 and 20: 4150 DYBAR - (MOD) RS 4150 Dybar is
Page 21 and 22: AISI 4340 - HR Q&T ROUNDS Diameter
Page 23 and 24: AISI 6150 - ANNEALED HR/DCF An elec
Page 25 and 26: AISI 6150 - ANNEALED FLATS AND SQUA
Page 27 and 28: AISI 8620/86L20 Carefully controlle
Page 29 and 30: AISI 8620 FLATS AND SQUARES CUT FRO
Page 31 and 32: AISI 86L20 ROUNDS Diameter (inches)
Page 33: alro.com Super Square Precision mil

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