Table 13-1

Chapter 13 Wrought Stainless Steels

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CHEMICAL COMPOSITION OF WROUGHT MARTENSITIC STAINLESS STEELS^a

Type^b	UNS	C	Mn	Si	Cr	Ni	Mo	Other
403	S40300	0.15	1.00	0.50	11.5-13.0	---	---	---
410	S41000	0.15	1.00	1.00	11.5-13.5	---	---	---
410 Cb	S41040	0.15	1.00	1.00	11.5-13.5	---	---	0.05-0.20 Nb
(XM-30)
414	S41400	0.15	1.00	1.00	11.5-13.5	1.25-2.50	---	---
416^c	S41600	0.15	1.25	1.00	12.0-14.0	---	0.60^d	---
416Se	S41623	0.15	1.25	1.00	12.0-14.0	---	---	0.15 min Se
416 Plus X	S41610	0.15	1.50-2.50	1.00	12.0-14.0	---	0.60	---
(XM-6)^b
420	S42000	0.15 min	1.00	1.00	12.0-14.0	---	---	---
420F^b	S42020	0.15 min	1.25	1.00	12.0-14.0	---	0.60^d	---
422	S42200	0.20-0.25	1.00	0.75	11.5-13.5	0.50-1.00	0.75-1.25	0.75-1.25 W
								0.15-0.30 V
431	S43100	0.20	1.00	1.00	15.0-17.0	1.25-2.50	---	---
440A	S44002	0.60-0.75	1.00	1.00	16.0-18.0	---	0.75	---
440b	S44003	0.75-0.95	1.00	1.00	16.0-18.0	---	0.75	---
440C	S44004	0.95-1.20	1.00	1.00	16.0-18.0	---	0.75	---
a. Although sulphur and phosphorus contents are not listed in this table due to limited space, they are specified; see appropriate material
standard for more details.
b. XM designations in this column are ASTM designations for the listed alloy.
c. Free-machining grade with 0.15 % minimum sulphur.
d. Optional.
Single values are maximums, unless otherwise specified.

MARTENSITIC STAINLESS STEELS

410

General

Purpose

431

Cr increased

Ni added

for corrosion

resistance

Good Mechan.

properties

414

Ni added

for better

corrosion

resistance

403

Select

quality

for turbine

and highly

stressed

parts

420

Increased

C to improve

mechanical

properties

416

P & S

increased

to improve

machining

440C

C increased

for highest

hardness

Cr increased

for corrosion

resistance

422

Strength &

toughness

to 1200⁰F

via addition

of Mo, V, W

416Se

Se added

for better

machined

surfaces

440B

C decreased

slightly to

improve toughness

420F

P & S

increased

to improve

machining

440A

Same as 440B

only more so

The Ferrous Metals Data Book

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The Ferrous Metals Data Book