JIS · 2,322 grades

JIS steel grades — 2322 designations — Page 23

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. 25 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
SMn420H	1.1133	Quenched and tempered steels	0.17–0.23	20
SMn420H	1.1160	Low-temperature structural steels	0.18–0.25	6
SMn420HRCH This grade’s own name	—	Cold extrusion steels	0.16–0.23	—
SMn420RCH This grade’s own name	—	Cold extrusion steels	0.17–0.23	—
SMn423H	1.1165	Quenched and tempered steels	0.25–0.32	16
SMn433 This grade’s own name	—	—	0.3–0.36	—
SMn433	1.1165	Quenched and tempered steels	0.25–0.32	16
SMn433	1.0762	Free cutting steels	0.4–0.48	20
SMn433H	1.1173	Quenched and tempered steels	0.27–0.34	7
SMn433H	1.1165	Quenched and tempered steels	0.25–0.32	16
SMn433H	1.0762	Free cutting steels	0.4–0.48	20
SMn433HRCH This grade’s own name	—	Cold extrusion steels	0.29–0.36	—
SMn433RCH This grade’s own name	—	Cold extrusion steels	0.3–0.36	—
SMn438	1.1167	Quenched and tempered steels	0.32–0.4	17
SMn438	1.1127	Quenched and tempered steels	0.34–0.42	6
SMn438	1.1165	Quenched and tempered steels	0.25–0.32	16
SMn438H	1.1167	Quenched and tempered steels	0.32–0.4	17
SMn438HRCH This grade’s own name	—	Cold extrusion steels	0.34–0.41	—
SMn438M This grade’s own name	—	—	0.35–0.41	1
SMn438RCH This grade’s own name	—	Cold extrusion steels	0.35–0.41	—
SMn443	1.1127	Quenched and tempered steels	0.34–0.42	6
SMn443	1.1167	Quenched and tempered steels	0.32–0.4	17
SMn443	1.5069	High-strength steels	0.35	7
SMn443	1.5223	Quenched and tempered steels	0.38–0.45	8
SMn443	1.0912	Others	0.42–0.5	11
SMn443H	1.1167	Quenched and tempered steels	0.32–0.4	17
SMn443HRCH This grade’s own name	—	Cold extrusion steels	0.29–0.36	—
SMn443M This grade’s own name	—	—	0.4–0.46	1
SMn443RCH This grade’s own name	—	Cold extrusion steels	0.4–0.46	—
SMnC420	1.7131	Case hardening steels	0.14–0.19	24
SMnC420H This grade’s own name	—	—	0.16–0.23	—
SMnC420H	1.7147	Case hardening steels	0.17–0.22	15
SMnC420H	1.7131	Case hardening steels	0.14–0.19	24
SMnC420RCH This grade’s own name	—	Cold extrusion steels	0.17–0.23	—
SMnC443 This grade’s own name	—	—	0.4–0.46	—
SMnC443H This grade’s own name	—	—	0.39–0.46	—
SMnC443RCH This grade’s own name	—	Cold extrusion steels	0.4–0.46	—
SN400A This grade’s own name	—	Unalloyed structural steels	≤ 0.24	—
SN400B This grade’s own name	—	Unalloyed structural steels	≤ 0.22	—
SN400B	1.0044	Unalloyed structural steels	≤ 0.21	26
SN400C This grade’s own name	—	Unalloyed structural steels	≤ 0.22	—
SN400C	1.0044	Unalloyed structural steels	≤ 0.21	26
SN490B This grade’s own name	—	Unalloyed structural steels	≤ 0.2	—
SN490B	1.0044	Unalloyed structural steels	≤ 0.21	26
SN490C This grade’s own name	—	Unalloyed structural steels	≤ 0.2	—
SN490C	1.0044	Unalloyed structural steels	≤ 0.21	26
SNB16 This grade’s own name	—	—	0.36–0.44	—
SNB21-1 This grade’s own name	—	—	0.36–0.44	—
SNB21-2 This grade’s own name	—	—	0.36–0.44	—
SNB21-3 This grade’s own name	—	—	0.36–0.44	—

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.