ISO · 531 grades

ISO steel grades — 531 designations — Page 9

Every grade designated under ISO, with the material number it maps to, what kind of steel it is, its carbon window and how many other standards carry it. Open a grade for its full composition, properties and its designations in other standards. Unless marked, every name here is an indicative cross-reference, not an asserted identity — the grades are close, not interchangeable. 2 of 50 rows differ and carry a “This grade’s own name” mark.

Also known as

531 designations

Grade	Material no.	Category	C% by weight	Also inother standards
NiCr19Fe19Nb5Mo3	2.4668	High-temperature steels	0.02–0.08	10
NiCr20Co13Mo4Ti3Al	2.4654	Nickel and cobalt alloys	0.02–0.1	6
NiCr20Co18Ti3	2.4632	High-temperature steels / aviation variant	≤ 0.13	5
NiCr20Cr20Mo5Ti2Al	2.4650	Nickel and cobalt alloys	0.04–0.08	5
NiCr20Ti	2.4951	High-temperature steels	0.08–0.15	6
NiCr20Ti2Al	2.4952	High-temperature steels	0.04–0.1	6
NiCr21Fe18Mo9	2.4665	High-temperature steels	0.05–0.15	11
NiCr21Mo16W4	2.4606	Others	≤ 0.01	3
NiCr22Co12Mo9	2.4663	Nickel and cobalt alloys	0.05–0.1	6
NiCr22Fe20Mo6Cu2Nb	2.4663	Nickel and cobalt alloys	0.05–0.1	6
NiCr22W14Mo	2.4733	Others	0.05–0.15	5
NiCr23Fe15Al	2.4851	Heat resistant steels	0.03–0.1	7
NiCr23Mo16	2.4605	Nickel and cobalt alloys	≤ 0.01	3
NiCr25Fe10AlY	2.4633	Nickel and cobalt alloys	0.15–0.25	3
NiCr29Fe	2.4642	Nickel and cobalt alloys	≤ 0.05	3
NiCr29Fe9	2.4642	Nickel and cobalt alloys	≤ 0.05	3
NiCu30	2.4360	Nickel and cobalt alloys	≤ 0.15	7
NiFe36Cr12Mo6Ti3	2.4975	High-temperature steels	≤ 0.1	4
NiMo16Cr17Ti	2.4610	Nickel and cobalt alloys	≤ 0.015	3
NiMo30Cr	2.4600	Others	≤ 0.01	1
NW0665	2.4617	Nickel and cobalt alloys	≤ 0.01	4
NW2200	2.4066	Nickel and cobalt alloys	≤ 0.1	10
NW2200	2.4068	Nickel and cobalt alloys	≤ 0.02	8
NW2201	2.4066	Nickel and cobalt alloys	≤ 0.1	10
NW2201	2.4068	Nickel and cobalt alloys	≤ 0.02	8
NW4400	2.4360	Nickel and cobalt alloys	≤ 0.15	7
NW5500	2.4375	Nickel and cobalt alloys	≤ 0.2	6
NW6007	2.4663	Nickel and cobalt alloys	0.05–0.1	6
NW6017	2.4663	Nickel and cobalt alloys	0.05–0.1	6
NW6455	2.4610	Nickel and cobalt alloys	≤ 0.015	3
NW6601	2.4851	Heat resistant steels	0.03–0.1	7
NW6621	2.4951	High-temperature steels	0.08–0.15	6
NW6690	2.4642	Nickel and cobalt alloys	≤ 0.05	3
NW7001	2.4654	Nickel and cobalt alloys	0.02–0.1	6
NW7090	2.4632	High-temperature steels / aviation variant	≤ 0.13	5
NW7263	2.4650	Nickel and cobalt alloys	0.04–0.08	5
NW7718	2.4668	High-temperature steels	0.02–0.08	10
NW7750	2.4669	High-temperature steels	≤ 0.08	8
NW8020	2.4660	Nickel and cobalt alloys	≤ 0.07	4
NW8020	1.4527	Others	≤ 0.06	3
NW8800	1.4876	Heat resistant steels	≤ 0.12	12
NW8800	1.4958	High-temperature steels	0.03–0.08	6
NW8800	1.4959	High-temperature steels	0.05–0.1	6
NW8800	1.4558	Stainless steels	≤ 0.03	4
NW9911	2.4975	High-temperature steels	≤ 0.1	4
P1024Z This grade’s own name	—	—	—	—
P1025Z This grade’s own name	—	—	—	—
P11	1.0481	Heat-resistant structural steels	0.08–0.2	17
P11	1.0445	Higher strength steels	—	12
P26	1.5415	Heat-resistant structural steels	0.12–0.2	15

This grade’s own name — recorded in our sources as this grade’s own designation under that standard.
Indicative — taken from a published cross-reference table; a close match, not a guarantee of interchangeability. Verify against the mill certificate before ordering.
Withdrawn — designation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.