JIS · 2,322 grades

JIS steel grades — 2322 designations — Page 10

Every grade designated under JIS, 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. 24 of 50 rows differ and carry a “This grade’s own name” mark.

Also known as

2322 designations

Grade	Material no.	Category	C% by weight	Also inother standards
SCM 440	1.7223	Steels for surface hardening	0.38–0.44	13
SCM 445H This grade’s own name	1.7228	Quenched and tempered steels	0.46–0.54	12
SCM2	1.7220	Quenched and tempered steels	0.3–0.37	24
SCM3	1.7220	Quenched and tempered steels	0.3–0.37	24
SCM4 This grade’s own name	1.7225	Quenched and tempered steels	0.38–0.45	25
SCM4	1.7227	Quenched and tempered steels	0.38–0.45	15
SCM415	1.7262	Case hardening steels	0.13–0.17	18
SCM415H This grade’s own name	—	—	0.12–0.18	—
SCM415H	1.7262	Case hardening steels	0.13–0.17	18
SCM415HRCH This grade’s own name	—	Cold extrusion steels	0.12–0.18	—
SCM415M This grade’s own name	—	—	0.13–0.18	1
SCM415RCH This grade’s own name	—	Cold extrusion steels	0.13–0.18	—
SCM415TK This grade’s own name	—	—	0.13–0.18	—
SCM418	1.7243	Case hardening steels	0.15–0.21	12
SCM418	1.7218	Quenched and tempered steels	0.22–0.29	25
SCM418H	1.7243	Case hardening steels	0.15–0.21	12
SCM418HRCH This grade’s own name	—	Cold extrusion steels	0.15–0.21	—
SCM418RCH This grade’s own name	—	Cold extrusion steels	0.16–0.21	—
SCM418TK This grade’s own name	—	—	0.16–0.21	—
SCM420	1.7218	Quenched and tempered steels	0.22–0.29	25
SCM420	1.7214	Special steels for aviation and aerospace	0.22–0.29	9
SCM420	1.7216	Low-temperature structural steels	0.27–0.34	9
SCM420	1.7220	Quenched and tempered steels	0.3–0.37	24
SCM420	1.7230	Others	0.3–0.37	8
SCM420	—	—	0.18–0.23	3
SCM420H This grade’s own name	—	—	0.17–0.23	—
SCM420H	1.7218	Quenched and tempered steels	0.22–0.29	25
SCM420HRCH This grade’s own name	—	Cold extrusion steels	0.17–0.23	—
SCM420RCH This grade’s own name	—	Cold extrusion steels	0.18–0.23	—
SCM420TK This grade’s own name	—	—	0.18–0.23	—
SCM421 This grade’s own name	—	—	0.17–0.23	—
SCM421	1.7264	Case hardening steels	0.18–0.23	4
SCM425 This grade’s own name	1.7218	Quenched and tempered steels	0.22–0.29	25
SCM425 This grade’s own name	—	—	0.23–0.28	—
SCM425	—	—	0.23–0.28	3
SCM425H This grade’s own name	—	—	0.23–0.28	—
SCM425HRCH This grade’s own name	—	Cold extrusion steels	0.23–0.28	—
SCM425RCH This grade’s own name	—	Cold extrusion steels	0.23–0.28	—
SCM430	1.7218	Quenched and tempered steels	0.22–0.29	25
SCM430	1.7214	Special steels for aviation and aerospace	0.22–0.29	9
SCM430	1.7216	Low-temperature structural steels	0.27–0.34	9
SCM430	1.7220	Quenched and tempered steels	0.3–0.37	24
SCM430	1.7230	Others	0.3–0.37	8
SCM430M This grade’s own name	—	—	0.28–0.33	1
SCM430RCH This grade’s own name	—	Cold extrusion steels	0.28–0.33	—
SCM430TK This grade’s own name	—	—	0.28–0.33	—
SCM432	1.7220	Quenched and tempered steels	0.3–0.37	24
SCM432	1.7218	Quenched and tempered steels	0.22–0.29	25
SCM435	1.7220	Quenched and tempered steels	0.3–0.37	24
SCM435H This grade’s own name	1.7226	Others	0.3–0.37	9

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.