UNS umbering Systems.

Unified Numbering Systems for Metals and Alloys

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.

UNS Number A GROUP : Aluminum and Aluminum Alloys

A01001~A03080 | A03081~A03630 | A03631~A05160 | A05161~A03191 | A13330~A33550

A33551~A87475 | A91035~A91175 | A91180~A92025 | A92034~A93003 | A93004~A94047

A94104~A95056 | A95082~A95357 | A95451~A96009 | A96010~A96105 | A96110~A97021

A97029~A97179 | A97229~A98280

UNS Number C GROUP : Copper and Copper Alloys

C10100~C11300 | C11400~C16200 | C16500~C37000 | C37700~C65100

C84400~C94400 | C94500~C99500

UNS Number F GROUP : Cast Irons

F10001~F24830 | F25530~F47003

UNS Number G GROUP : AISI and SAE Carbon and Alloy Steels

G10050~G10250 | G10260~G11080 | G11090~G15720 | G31400~G44270 | G45200~G51600

G51601~G92600 | G92620~G98500

UNS Number J GROUP : Cast Steel (Except Tool Steels)

J02002~J13512 | J13855~J92590 | J92600~J94650

UNS Number K GROUP : Miscellaneous Steels and Ferrous Alloys

K00040~K02300 | K02301~K03017 | K03046~K07000 | K07001~K11630 | K11646~K12238

K12244~K19667 | K19965~K32550 | K32723~K93120 | K93600~K95000

UNS Number N GROUP : Nickel and Nickel Alloys

N02200~N07080 | N07353~N08811 | N08825~N10665

UNS Number S GROUP : Heat and Corrosion Refractory Metals and Alloys

S13800~S30200 | S30215~S30909 | S30940~S31654 | S31700~S35000 | S35500~S43035

S43036~S66545

Comparative Table

UNS Number G GROUP : AISI and SAE Carbon and Alloy Steels - G51601~G92600

UNS No	Description	ASTM Brand/Trp	ASTM Equivalent
UNS G51601	Cr-B Alloy Steel		ASTM A322 (51B50), ASTM A331 (51B60),
			ASTM A519 (51B50)
UNS G51986	Cr Alloy Steel		ASTM A29 (E51100), ASTM A295 (E51100),
			ASTM A322 (E51100), ASTM A505 (E51100)
			ASTM A519 (E51100), ASTM A711
UNS G52986	Cr Alloy Steel		ASTM A29 (E52100), ASTM A295 (E52100),
			ASTM A331 (E52100), ASTM A505 (E52100),
			ASTM A519 (E52100), ASTM A535 (E52100),
			ASTM A646 (E52100)
UNS G61180	Cr-V Alloy Steel		ASTM A29 (6118), ASTM A322 (6118), ASTM A331 (6118),
UNS G61200	Cr-V Alloy Steel		ASTM A331 (6120), ASTM A519 (6120), ASTM A711
UNS G61500	Cr-V Alloy Steel		ASTM A29 (6150), ASTM A322 (6150), ASTM A331 (6150),
			ASTM A519 (6150)
UNS G81150	Ni-Cr-Mo Alloy Steel		ASTM A29 (8115), ASTM A519 (8115)
UNS G81451	Ni-Cr-Mo Alloy Steel		ASTM A322, ASTM A331 (81B45), ASTM A519 (81B45)
UNS G86150	Ni-Cr-Mo Alloy Steel		ASTM A29 (8615), ASTM A322 (8615), ASTM A331 (8615)
			ASTM A519 (8615)
UNS G86170	Ni-Cr-Mo Alloy Steel		ASTM A29 (8617), ASTM A322 (8617), ASTM A331 (8617),
			ASTM A519 (8617)
UNS G86200	Ni-Cr-Mo Alloy Steel		ASTM A29 (8620), ASTM A321 (8620), ASTM A331 (8620),
			ASTM A505 (8620), ASTM A519 (8620)
UNS G86220	Ni-Cr-Mo Alloy Steel		ASTM A29 (8627), ASTM A321 (8627), ASTM A331 (8627),
			ASTM A519 (8627)
UNS G86250	Ni-Cr-Mo Alloy Steel		ASTM A29 (8625), ASTM A321 (8625), ASTM A331 (8625),
			ASTM A519 (8625)
UNS G86270	Ni-Cr-Mo Alloy Steel		ASTM A29 (8627), ASTM A321 (8627), ASTM A331 (8627),
			ASTM A519 (8627)
UNS G86300	Ni-Cr-Mo Alloy Steel		ASTM A29 (8630), ASTM A321 (8630), ASTM A331 (8630),
			ASTM A519 (8630)
UNS G86370	Ni-Cr-Mo Alloy Steel		ASTM A29 (8637), ASTM A321 (8637), ASTM A331 (8637),
			ASTM A519 (8637)
UNS G86400	Ni-Cr-Mo Alloy Steel		ASTM A29 (8640), ASTM A321 (8640), ASTM A331 (8640),
			ASTM A519 (8640)
UNS G86420	Ni-Cr-Mo Alloy Steel		ASTM A29 (8642), ASTM A321 (8642), ASTM A331 (8642),
			ASTM A519 (8642)
UNS G86450	Ni-Cr-Mo Alloy Steel		ASTM A29 (8645), ASTM A321 (8645), ASTM A331 (8645),
			ASTM A519 (8645)
UNS G86451	Ni-Cr-Mo Alloy Steel		ASTM A519 (86B45)
UNS G86500	Ni-Cr-Mo Alloy Steel		ASTM A29 (8650), ASTM A321 (8650), ASTM A331 (8650),
			ASTM A519 (8650), ASTM A689
UNS G86550	Ni-Cr-Mo Alloy Steel		ASTM A29 (8655), ASTM A321 (8655), ASTM A331 (8655),
			ASTM A519 (8655), ASTM A689
UNS G86600	Ni-Cr-Mo Alloy Steel		ASTM A322 (8660), ASTM A519 (8660), ASTM A689 (8660), ASTM A711
UNS G87200	Ni-Cr-Mo Alloy Steel		ASTM A29 (8720), ASTM A321 (8720), ASTM A331 (8720),
			ASTM A519 (8720)
UNS G87350	Ni-Cr-Mo Alloy Steel		ASTM A519 (8735)
UNS G87400	Ni-Cr-Mo Alloy Steel		ASTM A29 (8740), ASTM A321 (8740), ASTM A331 (8740),
			ASTM A519 (8740)
UNS G87420	Ni-Cr-Mo Alloy Steel		ASTM A331 (8742), ASTM A519 (8742)
UNS G88220	Ni-Cr-Mo Alloy Steel		ASTM A29 (8622), ASTM A321 (8622), ASTM A331 (8622),
			ASTM A519 (8622)
UNS G92540	Cr-Si Alloy Steel		ASTM A29 (9254), ASTM A401
UNS G92550	Si-Mn Alloy Steel		ASTM A29 (9255)
UNS G92600	Si-Mn Alloy Steel		ASTM A29 (9260), ASTM A321 (9260), ASTM A331 (9260),
			ASTM A689

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