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Martensitic Stainless Steel Grades

 

CHARACTERISTICS OF STAINLESS STEEL

STAINLESS STEEL
MARTENSITIC GRADES
 
(HEAT TREATABLE)

C

Cr

Ni

OTHER (max)

MAGNETIC
YES - NO

AVAILABLE FORMS

403

ALSO KNOWN AS TURBINE QUALITY. SIMILAR TO 410 WITH TIGHTER CONTROL ON COMPOSITION AND MANUFACTURE.

.15

11.5-13.5

Mn 1.0 Ph .04
S .03 Si .50

YES

BAR STRIP
FORGINGS CASTINGS

410
410S

GENERAL PURPOSE HEAT TREATABLE STRAIGHT CHROME. HARDENS TO RC 35-39 410 IS FAIR MACHINING. 410S HAS LESS THAN .08 C. IT IS NOT HEAT TREATABLE

0.12-.15

11.5-13.5

Mn 1.0 Ph .04
S .03 Si 1.0

YES

SHEET PLATE STRIP
BAR TUBE WIRE
FORGINGS CASTINGS

416

FREE MACHINING STRAIGHT CHROMIUM GRADE. HEAT TREATABLE TO RC35 MIN. 416HT IS PRE-HEAT TREATED

.15

11.5-13.5

Mn. 1.25 P .06
S .15 Si 1.0
Mo .06

YES

BAR WIRE PLATE
FORGINGS CASTINGS

420

HIGHER CARBON STRAIGHT CHROME. HEAT TREATABLE TO RC50 MIN. MODIFIED FOR FREE MACHINING IS 42OF & 420F Se

.30
.40

12.0-14.0

.50 MAX

Mn 1.0 P .06
Su .03 Si 1.0

YES

BAR PLATE
WIRE
FORGING CASTINGS

422

EXCELLENT CREEP/RUPTURE QUALITIES AT HIGH TEMPERATURES. EXCELLENT HEAT TREAT QUALITIES AT VARYING HARDNESS

.23

12

.80

Mn .75 V .25
Si .35 Mo 1.0
W 1.0

YES

BAR PLATE
FORGINGS CASTINGS

431

SUPERIOR CORROSION RESISTANCE TO 410 & 416 WITH HIGH MECHANICAL PROPERTIES AFTER HEAT TREATMENT.

.13
.17

15.5-16.5

2.0-3.0

Mn .30-.80
Si .20-.60
P .04 S .03

YES

BAR WIRE
FORGINGS

440A
440C

ATTAINS HIGHEST HARDNESS OF STRAIGHT CHROMES. GOOD CORROSION RESISTANCE 440A HARDNESS TO RC58-62. 440C TO RC 61-62. 440F & 440F Se ARE THE MODIFIED 440 FOR FREE MACHINING.

440A
.6-.7
440C
.95-
1.25

16.0-18.0

.50 MAX

Mn 1.0
S .3
Si 1.0
Mo .75

YES

440C
SHEET PLATE BAR
FORGINGS
440A
STRIP WIRE

STAINLESS STEEL
PRECIPITATION
HARDENING
(HEAT TREATABLE)

C

Cr

Ni

OTHER (max)

MAGNETIC
YES - NO

AVAILABLE FORMS

PH13-8Mo

PROVIDES A COMBINATION OF EXCELLENT TOUGHNESS, GOOD TRANSVERSE MECHANICAL PROPERTIES AND CORROSION RESISTANCE.

.05

12.25-13.25

7.50-8.50

Mo 2.00-2.50
A1 0.9-1.35

YES

SHEET BAR
FORGINGS

17-4 PH

EXCELLENT CORROSION RESISTANCE, HIGH STRENGTH & HARDNESS, LOW TEMPERATURE HARDENING & FABRICATES WELL. MARTENSITIC.

.07

15.5-17.5

3.00-5.00

CU 3.00-5.00
Cb+Ta
0.15-0.45

YES

SHEET PLATE
BAR FORGINGS

17-7 PH

HIGH STRENGTH & EXCELLENT MECHANICAL PROPERTIES AT HIGH TEMPERATURES SEMI-AUSTENITIC.

.09

16.00-18.00

6.50-7.75

Al .75-1.50
Mn 1.00
P .04 S .03

YES

SHEET PLATE
BAR WIRE
FORGINGS

15-5PH
VAR

SIMILAR TO 17-4PH BUT WITH BETTER TRANSVERSE DUCTILITY AND TOUGHNESS. GOOD FORGING QUALITIES. MARTENSITIC

.07

14.00-15.5

3.50-5.50

Cu 2.5-4.5
Cb+Ta
0.15-0.45

YES

SHEET PLATE
BAR FORGINGS

PH15-7Mo

SIMILAR TO17-7PH BUT WITH HIGHER STRENTH. SEMI-AUSTENITIC.

.09

14.00-16.00

6.50-7.75

Mo 2.00-3.00
Al 0.75-1.50

YES

SHEET PLATE STRIP
BAR FORGINGS

A286

VACUMN MELTED HIGH STRENGTH IN HIGH TEMPERATURES AND CRYOGENIC USES. LOW MAGNETIC PERMEABILITY. AUSTENITIC.

.08

13.50-16.00

24.0-27.0

Mo 1.00-1.50
Ti 1.9-2.35
A 1.35 Cu .5
Si 1.0 Mn 2.

NO

SHEET PLATE
STRIP
WIRE
BAR
FORGINGS

AM350

SIMILAR TO 17-7 & PH15-7 Mo, BUT WITH SLIGHTLY BETTER HIGH TEMPERATURE CAPABILITIES.

.08

16.00-17.00

4.00-5.00

Mo 2.5-3.25
Mn .5-1.25
N .07-.13

NO

SHEET STRIP
BAR FORGINGS

 

 

 
 
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