International Standard Comparative

MIL No. :: UNS No.

Military Specifications and Standards :: Unified Numbering Systems for Metals and Alloys


A United States defense standard, often called a military standard, "MIL-STD", "MIL-SPEC", or (informally) "MilSpecs", is used to help achieve standardization objectives by the U.S. Department of Defense. Defense standards are also used by other non-defense government organizations, technical organizations, and industry.


The UNS for Metals and Alloys provides a means of correlating many internationally used metal and alloy numbering systems administered by societies, trade associations, and individual users and producers of metals and alloys. Jointly developed by ASTM International and the Society of Automotive Engineers (SAE), it provides the uniformity necessary for efficient indexing, record keeping, data storage and retrieval, and cross-referencing.

Comparative Table1

MIL No. UNS No.   MIL No. UNS No.   MIL No. UNS No.
MIL-G-S-24149/2 A95083 MIL-S-5059(301) S30100 MIL-B-7883(BAg-13) P07540
MIL-C-15345(Alloy13) C95400 MIL-S-5059(304) S30400 MIL-B-7883(BAg-19) P07925
MIL-S-43 K03201 MIL-S-5059(316) S31600 MIL-B-7883(BAg-23) P07850
MIL-C-50 C26000 MIL-T-5066 G10250 MIL-B-7883(BCuP-3) C55281
MIL-W-85 A91100 MIL-F-5509 A92014 MIL-B-7883(BCuP-5) C55284
MIL-W-85 A96061 MIL-F-5509 A92024 MIL-B-7883(BNi-1) N99600
MIL-W-85 A96063 MIL-F-5509 A97075 MIL-B-7883(BNi-A) N99610
MIL-W-85 C10100 MIL-F-5626 G41400 MIL-B-7883(BNi-2) N99620
MIL-W-85 C10200 MIL-R-5674 A91100 MIL-B-7883(BNi-4) N99640
MIL-W-85 C12000 MIL-R-5674 A92017 MIL-B-7883(BNi-5) N99650
MIL-W-85 C22000 MIL-R-5674 A92024 MIL-S-7947 G10950
MIL-S-645 K01602 MIL-R-5674 A92117 MIL-S-7952 G10200
MIL-S-867(I) J92650 MIL-R-5674 A95056 MIL-S-7952 G10250
MIL-S-867(II) J92730 MIL-R-5695 S30400 MIL-T-8231 G65500
MIL-S-867(III) J92910 MIL-S-6049 G87400 MIL-S-8503 G33106
MIL-S-870 J12520 MIL-S-6050 G86300 MIL-S-8503 G61500
MIL-S-980 K19964 MIL-S-6098 G87350 MIL-T-8504(304) S30400
MIL-S-980(52100) G52986 MIL-S-6709 K24065 MIL-T-8506(304) S30400
MIL-T-1368 N04400 MIL-W-6712 A91100 MIL-N-8550 N07750
MIL-B2029 C10200 MIL-W-6712 A94043 MIL-S-8559 G10950
MIL-S-3039 K04600 MIL-W-6712 C10200 MIL-S-8690 G86200
MIL-T-3235 C10300 MIL-W-6712 C11000 MIL-S-8599 K23080
MIL-T-3235 C12000 MIL-W-6712 C22000 MIL-R-8814 A92117
MIL-T-3235 C12200 MIL-W-6712 C26800 MIL-R-8814 A95056
MIL-S-3289 G10350 MIL-W-6712 C46400 MIL-S-8840 S35000
MIL-S-3289 K02901 MIL-W-6712 C51000 MIL-S-8840 S35500
MIL-W-3318 X10100 MIL-W-6712 C61800 MIL-S-8840(3) K44220
MIL-W-3318 C10400 MIL-S6758 G41300 MIL-M-8916 M13312
MIL-W-3318 C10700 MIL-B6812 A92024 MIL-M-8917 M13210
MIL-C-3383 C22000 MIL-E6843(10013) W10013 MIL-M-8949 K24728
MIL-T-3520 G10200 MIL-T-6845(304) S30400 MIL-W-8957 K08700
MIL-T-3520 G10250 MIL-Z-7068(Class I) Z35543 MIL-S-8967 S43100
MIL-T-3595 C51000 MIL-Z-7068(Class II) Z35542 MIL-T-9046 R50400
MIL-F-3922 A02080 MIL-T-7081 A96061 MIL-T-9046 R50550
MIL-F-3922 A02950 MIL-S-7108 K32550 MIL-T-9046 R50700
MIL-F-3922 A03550 MIL-S-7393 G33106 MIL-T-9046 R54520
MIL-F-3922 A03560 MIL-S-7420 G52986 MIL-T-9046 R54521
MIL-F-3922 A05180 MIL-S-7720 S30200 MIL-T-9046 R54560
MIL-F-3922 A13600 MIL-S-7720(316) S31600 MIL-T-9046 R54620
MIL-F-3922 A96061 MIL-N-7786 N07750 MIL-T-9046 R54810
MIL-F-3922(C712.0) A07110 MIL-B7883B (BNi-3) N99630 MIL-T-9046 R86080
MIL-F-3922(D712.0) A07120 MIL-B7883(BAg-1) P07450 MIL-T-9046 R56210
MIL-S-4043 S30403 MIL-B7883(BAg-1a) P07500 MIL-T-9046 R56320
MIL-S-5000 G43400 MIL-B7883(BAg-2) P07350 MIL-T-9046 R56400
MIL-S-5000 G43406 MIL-B7883(BAg-3) P07501 MIL-T-9046 R45401
MIL-S-5059 S30200     MIL-T-9046 R56430
        MIL-T-9046 R56620
        MIL-T-9046 R58010
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