Midway Corporation

AIR HARDENING DRILL ROD INFO DOC

A-2 Drill Rod is air-hardening ground and polished. It can be used to replace O-1 for applications for safer heat treating, less distortion during hardening and greater wear resistance.

 

A-2 features good machinability, high stability after hardening, good wear resistance and is suitable for medium run tooling.

Chemical Composition

  • Carbon .95/1.05
  • Maganese 1.00 max
  • Silicon .030 max
  • Phosphorus .025 max.
  • Sulphur .030 max.
  • Chromium 4.75/5.50
  • Vanadium .15/.50
  • Tungsten --Molybdenum .90/1.40

Tolerances Standard Diameter

  • .06250 to 0.1240 +/- .0003"
  • .01250 to 0.4990 +/- .0005"
  • .05000 to 3.000 +/- .0010"
  • Straightness
  • .005" Max TIR in 12"
  • + .12500 - 0.00"
  • Standard Length Tolerance
  • + .12500 -0.00"

UNS T30102

  • SAE J-437
  • ASTM A-681-94
  • Federal QQT-570-Rev C

Surface Finish

  • .06250 to 0.12499 10 RMS
  • 0.12500 to 0.4999 15 RMS
  • 0.5000 to 0.87499 20 RMS

Fractional Sizes Available in 3' & 12' Length

  • 1/16"
  • 5/64"
  • 3/32"
  • 7/64"
  • 1/8"
  • 9/64"
  • 5/32"
  • 11/64"
  • 3/16"
  • 13/64"
  • 7/32"
  • 15/64"
  • 1/4"
  • 17/64"
  • 9/32"
  • 19/64"
  • 5/16"
  • 21/64"
  • 11/32"
  • 23/64"
  • 3/8"
  • 25/64"
  • 13/32"
  • 27/64"
  • 7/16"
  • 29/64"
  • 15/32"
  • 31/64"
  • 1/2"
  • 17/32"
  • 9/16"
  • 19/32"
  • 5/8"
  • 21/32"
  • 11/16"
  • 23/32"
  • 3/4"
  • 13/16"
  • 7/8"
  • 15/16"
  • 1"
  • 1-1/8"
  • 1-1/4"
  • 1-3/8"
  • 1-1/2"
  • 1-3/4"
  • 2"

Letter Sizes Available in 3' & 12' Length

  • A
  • B
  • C
  • D
  • E
  • F
  • G
  • H
  • I
  • J
  • K
  • L
  • M
  • N
  • O
  • P
  • Q
  • R
  • S
  • T
  • U
  • V
  • W
  • X
  • Y
  • Z

Metric Sizes Available in 3' Length

  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25