TM 1-1500-204-23-6 Table 4-10.  Identification of Steel- CONT Commercial Current designation Specification Type Shape Conditions Tubing - continued 4135 MIL-T-6735 Seamless Same as 4130 A (Annealed) N (Normalized) HT-125 HT-150 HT-180 HT-200 8630 MIL-T-6734 Seamless Same as 4130 A (Annealed) N (Normalized) HT-125 HT-150 HT-180 8630 MIL-T-6732 Seamless Same as 4130 A (Annealed) N (Normalized) HT-125 HT-150 HT-180 8735 MIL-T-6733 Seamless I.  Round A (Annealed) II.  Rectangular N (Normalized) and Square HT-125 (125,000 III.  Streamline PSI IV.  Oval Minimum) HT-150 (150,000 PSI Minimum) HT-180 (180,000 PSI Minimum) 304 MIL-T-5695 Seamless or As Required 1/4-Hard Cold- Welded Drawn 1/2-Hard Cold- Drawn 304 MIL-T-8506 Seamless or As Required Annealed Only Welded 304 MIL-T-6845 Seamless or Round 1/8-Hard (Hydraulic) Welded 18-8 MIL-T-8504 Seamless or Round Annealed Only (Hydraulic) Welded 4-25