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  Tool Steel Chemical Composition

WATER HARDENING COLD WORK

CHROMIUM HOT WORK

SHOCK RESISTING

TUNGSTEN HOT WORK

OIL HARDENING COLD WORK

MOLYBDENUM HOT WORK

AIR HARDENING, MEDIUM ALLOY COLD WORK

TUNGSTEN HIGH SPEED

HIGH CARBON, HIGH CHROMIUM COLD WORK

MOLYBDENUM HIGH SPEED

LOW ALLOY, SPECIAL PURPOSE

ULTRAHARD HIGH SPEED

MOLD STEELS

Identifying Elements

Data Taken From SAE J438b

WATER HARDENING COLD WORK TOOL STEELS  [UP]
AISI UNS. No. C Mn Si Cr V W Mo Co Ni
                     
W1 T72301 0.60 1.40 (a)                
W2 T72302 0.06 1.40 (a)       0.25        
W5 T72305 1.10     0.50          
OIL HARDENING, COLD WORK TOOL STEELS  [UP]
AISI UNS. No. C Mn Si Cr V W Mo Co Ni
                     
O1 T31501 0.90 1.00   0.50   0.50      
O2 T31502 0.90 1.60              
O6 T31506 1.25 1.55 0.30 1.10 0.55 1.50 0.30 MAX     0.20 0.30    
O6 (b) T31506 1.45 0.80 1.00       0.25    
O7 T31507 1.20     0.75   1.75      
SHOCK RESISTING TOOL STEELS   [UP]
AISI UNS. No. C Mn Si Cr V W Mo Co Ni
                     
S1 T41901 0.50     1.50   2.50      
S2 T41902 0.50   1.00       0.50    
S4 T41904 0.05 0.65 0.60 0.95 1.75 2.25 0.35 MAX 0.35 MAX        
S5 T41905 0.55 0.80 2.00       0.40    
S6 T41906 0.45 1.40 2.25 1.50     0.40    
S7 T41907 0.50     3.25     1.40    
AIR HARDENING, MEDIUM ALLOY COLD WORK TOOL STEELS  [UP]
AISI UNS. No. C Mn Si Cr V W Mo Co Ni
A2 T30102 1.00     5.00     1.00    
A3 T30103 1.25     5.00 1.00   1.00    
A4 T30104 1.00 2.00   1.00     1.00    
A6 T30106 0.70 2.00   1.00     1.25    
A7 T30107 2.25     5.25 4.75 1.00 (c) 1.00    
A8 T30108 0.55     5.00   1.25 1.25    
A9 T30109 0.50     5.00 1.00   1.40   1.50
A10 (b) T30110 1.35 1.80 1.25       1.50   1.80
A11 T30111 2.45 0.50 0.90 5.25 9.75   1.30    
HIGH CARBON, HIGH CHROMIUM COLD WORK STEEL [UP]
AISI UNS. No. C Mn Si Cr V W Mo Co Ni
                     
D2 T30402 1.50     12.00 1.00   1.00    
D3 T30403 2.25     12.00          
D4 T30404 2.25     12.00     1.00    
D5 T30405 1.50     12.00     1.00 3.00  
D7 T30407 2.15 2.50 0.60 MAX 0.60 MAX 11.50  13.50 3.80  4.40   0.70 1.20    
LOW ALLOY, SPECIAL PURPOSE TOOL STEELS  [UP]
AISI UNS. No. C Mn Si Cr V W Mo Co Ni
L2 T61202 0.50 1.10(a)     1.00 0.20        
L6 T61206 0.70     0.75     0.25 (c)   1.50
MOLD STEELS  [UP]
AISI UNS. No. C Mn Si Cr V W Mo Co Ni
P2 T51602 0.07     2.00     0.20   0.50
P3 T51603 0.10     0.60         1.25
P4 T51604 0.07     5.00     0.75    
P5 T51605 0.1     2.25          
P6 T51606 0.1     1.5         3.5
P20 T51620 0.35     1.7     0.4    
P21 T51621 0.2 1.20 (Al)             4
CHROMIUM HOT WORK TOOL STEELS [UP]
AISI UNS. No. C Mn Si Cr V W Mo Co Ni
H11 T20811 0.35     5.00 0.40   1.50    
H12 T20812 0.35     5.00 0.40 1.50 1.50    
H13 T20813 0.35     5.00 1.00   1.50    
H14 T20814 0.40     5.00   5.00      
H19 T20819 0.40     4.25 2.00 4.25   4.25  
TUNGSTEN HOT WORK TOOL STEELS   [UP]
AISI UNS. No. C Mn Si Cr V W Mo Co Ni
H21 T20821 0.35     3.50   9.00      
H22 T20822 0.35     2.00   11.00      
H23 T20823 0.30     12.00   12.00      
H24 T20824 0.45     3.00   15.00      
H25 T20825 0.25     4.00   15.00      
H26 T20826 0.50     4.00 1.00 18.00      
MOLYBDENUM HOT WORK TOOL STEEL [UP]
AISI UNS. No. C Mn Si Cr V W Mo Co Ni
H42 T20842 0.60     4.00 2.00 6.00 5.00    
H43 T20843 0.50 .65 0.15 0.40 0.20 0.45 3.75 .50 1.80 2.20   7.75 8.50    
MOLYBDENUM HIGH SPEED TOOL STEELS  [UP]
AISI UNS. No. C Mn Si Cr V W Mo Co Ni
M1 T11301 0.80(a)     4.00 1.00 1.50 8.00    
M2 T11302 0.85 1.00(a)     4.00 2.00 6.00 5.00    
M2 H.C.                    
M3, CLASS 1 T11313 1.05     4.00 2.40 6.00 5.00    
M3, CLASS 2 T11323 1.20     4.00 3.00 6.00 5.00    
M4 T11304 1.30     4.00 4.00 5.50 4.50    
M6 T11306 0.80     4.00 2.00 4.00 5.00 12.00  
M7 T11307 1.00     4.00 2.00 1.75 8.75    
M10 T11310 0.85 1.00(a)     4.00 2.00   8.00    
M30 T11330 0.80     4.00 1.25 2.00 8.00 5.00  
M33 T11333 0.90     4.00 1.15 1.50 9.50 8.00  
M34 T11334 0.85 0.92     4.00 2.00 2.00 8.00 8.00  
M36 T11336 0.80     4.00 2.00 6.00 5.00 8.00  
ULTRAHARD HIGH SPEED TOOL STEELS [UP]
AISI UNS. No. C Mn Si Cr V W Mo Co Ni
M41 T11341 1.10     4.25 2.00 6.75 3.75 5.00  
M42 T11342 1.10     3.75 1.15 1.50 9.50 8.00  
M43 T11343 1.15 1.25     3.50 4.25 1.60 2.75 8.00 8.25  
M46 T11346 1.25     4.00 3.20 2.00 8.25 8.25  
M47 T11347 1.10     3.75 1.25 1.50 9.50 5.00  
M48 T11348 1.50     3.75 3.10 10.00 5.25 9.00  
M52 T11352 0.90     4.00 2.00 1.25 4.00    
M62 T11362 1.30     3.75 2.00 6.25 10.50    
TUNGSTEN HIGH SPEED TOOL STEELS [UP]
AISI UNS. No. C Mn Si Cr V W Mo Co Ni
T1 T12001 0.75(a)     4.00 1.00 18.00      
T2 T12002 0.80     4.00 2.00 18.00      
T4 T12004 0.75     4.00 1.00 18.00   5.00  
T5 T12005 0.80     4.00 2.00 18.00   8.00  
T6 T12006 0.80     4.50 1.50 20.00   12.00  
T8 T12008 0.75     4.00 2.00 14.00   5.00  
T15 T120015 1.50 1.60     3.75 5.00 5.00 12.00   5.00  

Last Updated on 6/14/99
By Norman Sousa

 

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Last modified: December 08, 2009