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SAE STEEL DESIGNATION |
NON - DEFORMING PROPERTIES |
SAFETY IN HARDENING |
DEPTH OF HARDENING (a) |
TOUGHNESS |
RESISTANCE TO SOFTENING EFFECT OF HEAT |
WEAR RESISTANCE |
MACHINABILITY |
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WATER HARDENING TOOL STEELS |
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W108 |
POOR |
FAIR |
SHALLOW |
GOOD (b) |
POOR |
FAIR |
BEST |
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W109 |
POOR |
FAIR |
SHALLOW |
GOOD (b) |
POOR |
FAIR |
BEST |
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W110 |
POOR |
FAIR |
SHALLOW |
GOOD (b) |
POOR |
GOOD |
BEST |
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W112 |
POOR |
FAIR |
SHALLOW |
GOOD (b) |
POOR |
GOOD |
BEST |
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W209 |
POOR |
FAIR |
SHALLOW |
GOOD |
POOR |
FAIR |
BEST |
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W210 |
POOR |
FAIR |
SHALLOW |
GOOD |
POOR |
GOOD |
BEST |
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W310 |
POOR |
FAIR |
SHALLOW |
GOOD |
POOR |
GOOD |
BEST |
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SHOCK RESISTING TOOL STEELS |
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S1-CHROME-TUNGSTEN |
FAIR |
GOOD |
MEDIUM |
GOOD |
FAIR |
FAIR |
FAIR |
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S2-SILICON-MOLYBDENUM |
W POOR (c) |
W POOR (c) |
MEDIUM |
BEST |
FAIR |
FAIR |
GOOD |
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O FAIR (c) |
O GOOD (c) |
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S5-SILICON-MANGANESE |
W POOR (c) |
W POOR (c) |
MEDIUM |
BEST |
FAIR |
FAIR |
FAIR |
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O FAIR (c) |
O GOOD (c) |
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COLD WORK TOOL STEELS |
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OIL HARDENING TYPES |
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O1-LOW MANGANESE |
GOOD |
GOOD |
MEDIUM |
FAIR |
POOR |
GOOD |
GOOD |
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02-HIGH MANGANESE |
GOOD |
GOOD |
MEDIUM |
FAIR |
POOR |
GOOD |
GOOD |
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O6-MOLYBDENUM GRAPHITIC |
FAIR |
GOOD |
MEDIUM |
FAIR |
POOR |
GOOD |
BEST |
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MEDIUM ALLOY AIR HARDENING TYPES |
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A2-5% CHROME AIR HARD |
BEST |
BEST |
DEEP |
FAIR |
FAIR |
GOOD |
FAIR |
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HIGH CARBON-HIGH CHROME TYPES |
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D2-HIGH CARBON-HIGH CHROME (AIR) |
BEST |
BEST |
DEEP |
FAIR |
FAIR |
BEST |
POOR |
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D3-HIGH CARBON-HIGH CHROME (OIL) |
GOOD |
GOOD |
DEEP |
POOR |
FAIR |
BEST |
POOR |
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D5-HIGH CARBON-HIGH CHROME- |
BEST |
BEST |
DEEP |
FAIR |
FAIR |
BEST |
POOR |
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COBALT |
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D7-HIGH CARBON-HIGH CHROME- |
BEST |
BEST |
DEEP |
POOR |
FAIR |
BEST |
POOR |
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HOT WORK TOOL STEELS |
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CHROME BASE TYPES |
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H11-CHROME-MOLYBDENUM-V |
GOOD |
GOOD |
DEEP |
GOOD |
GOOD |
FAIR |
FAIR |
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H12-CHROME-MOLYBDENUM- |
GOOD |
GOOD |
DEEP |
GOOD |
GOOD |
FAIR |
FAIR |
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TUNGSTEN |
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H13-CHROME-MOLYBDENUM-VV |
GOOD |
GOOD |
DEEP |
GOOD |
GOOD |
FAIR |
FAIR |
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TUNGSTEN BASE TYPES |
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H21-TUNGSTEN |
GOOD |
GOOD |
DEEP |
GOOD |
GOOD |
FAIR |
FAIR |
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HIGH SPEED TOOL STEELS |
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TUNGSTEN BASE TYPES |
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T1-TUNGSTEN 18-4-1 |
GOOD |
GOOD |
DEEP |
POOR |
GOOD |
GOOD |
FAIR |
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T2-TUNGSTEN 18-4-2 |
GOOD |
GOOD |
DEEP |
POOR |
GOOD |
GOOD |
FAIR |
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T4-COBALT-TUNGSTEN 18-4-1-5 |
GOOD |
FAIR |
DEEP |
POOR |
BEST |
GOOD |
FAIR |
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T5-COBALT-TUNGSTEN 18-4-2-8 |
GOOD |
FAIR |
DEEP |
POOR |
BEST |
GOOD |
FAIR |
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T8-COBALT-TUNGSTEN 18-4-2-5 |
GOOD |
FAIR |
DEEP |
POOR |
BEST |
GOOD |
FAIR |
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MOLYBDENUM BASE TYPES |
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M1-MOLYBDENUM 8-2-1 |
GOOD |
FAIR |
DEEP |
POOR |
GOOD |
GOOD |
FAIR |
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M2-MOLYBDENUM-TUNGSTEN 6-6-2 |
GOOD |
FAIR |
DEEP |
POOR |
GOOD |
GOOD |
FAIR |
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M3-MOLYBDENUM-TUNGSTEN 6-6-3 |
GOOD |
FAIR |
DEEP |
POOR |
GOOD |
BEST |
FAIR |
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M4-MOLYBDENUM-TUNGSTEN 6-6-4 |
GOOD |
FAIR |
DEEP |
POOR |
GOOD |
BEST |
FAIR |
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SPECIAL PURPOSE TOOL STEELS |
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LOW ALLOY TYPES |
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L6-NICKEL-CHROME |
FAIR |
GOOD |
MEDIUM |
FAIR |
POOR |
FAIR |
FAIR |
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L7-CHROME |
FAIR |
GOOD |
MEDIUM |
FAIR |
POOR |
GOOD |
FAIR |
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(a) These are intended to emphasize major differences between the groups of steels and do not account for the minor differences in depths |
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of hardening that exist between steels of the same group. This is particularly true of the Water Hardening W Steels which are frequently furnished |
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with varying degrees of hardenability as listed in Table 1. |
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(b) Toughness decreases somewhat with increasing depth of hardening. |
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(c) W as shown here indicates water quench. O as shown here indicates oil quench. |
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