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Eastern
Tool
Steel Service, Inc.
1045 Delaum Rd.
P.O.
Box 857
St.
Marys, Pa 15857
Phone:
(814) 834-7224
Fax:
(814) 834-7225
Or
Contact Us
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A-11LV PM Data Sheet
A-11LV PM is designed for use in tooling which encounters severe wear. Its toughness (cracking resistance) is higher than other high-wear resistant cold work tool steels permitting it to be used in some applications where A-11, D2 or high speed steels do not have sufficient resistance to cracking. It is usually limited in hardness to about 56 HRC or lower, and is therefore not intended for applications requiring high compressive strength.
Chemical Composition
| Carbon | 1.80% |
| Manganese | 0.50% |
| Chromium | 5.25% |
| Molybdenum | 1.30% |
| Vanadium | 9.00% |
| Silicon | 0.90% |
Typical Applications
| Blanking Dies | Warm Work Tooling |
| Forming Rolls | Trim/Shear Dies |
| Nozzles and Screw Tips | Punches |
| Plastic Injection Molding | Wear Inserts |
| Powder Compaction Punches |
Thermal Treatments
Preheat : 1100/1250F (590/675C) equalize, 1500/1550F (820/845C), equalize, Second preheating stage at 1800/1850F (1010/1040C)recommended for vacuum or atmosphere hardening. equalize.
Austenize : 1875/2050F (1000/1120C), 30/45 minutes at temperature. Standard recommendation to achieve RC 54-55 after tempering is to use 2050F (1120C)
Quench : Salt, oil or atmosphere quench to 1000-1100F(540-595C), equalize, then air cool to below 125F(50C) or hand warm.
Temper : 1000/1200F (540/650C) 1000F (540C) minimum, hold 2 hours at temperature, air cool. Temper twice minimum. Triple tempering is recommended if austenizing at 2000F (1095C)
Cryogenic Treating : Refrigeration treatments may improve long term dimensional stability by transforming retained austenite. Refrigeration treatments should generally be performed after the first temper, and must be followed by a temper.
Hardening Data
|
Temperature
|
1875F
|
1900F
|
1950F
|
2050F
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°C
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°F
|
(1025C)
|
(1040C)
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(1065C)
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(1120C)
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As Quenched
|
53
|
56
|
56
|
58
|
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540
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1000
|
52
|
53
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54
|
56
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OPTIMUM FOR MAXIMUM TOUGHNESS AND EFFECTIVE STRESS-RELIEVING.
|
|
550
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1025
|
51
|
52
|
53
|
55
|
|
565
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1050
|
50
|
51
|
52
|
53
|
|
595
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1100
|
46
|
47
|
49
|
51
|
|
620
|
1150
|
39
|
40
|
43
|
46
|
|
650
|
1200
|
33
|
34
|
37
|
40
|
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NOTE A:
|
RESULTS MAY VARY WITH HARDENING METHOD AND SECTION SIZE. SALT OR OIL
QUENCHING WILL GIVE MAXIMUM RESPONSE. VACUUM OR ATMOSPHERE COOLING MAY
RESULT IN UP TO 1-2 HRC POINTS LOWER. |
MINIMUM TIME AT
AUST TEMP (MINS)
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60
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45
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30
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20
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MINIMUM NUMBER
OF TEMPERS (2 HRS)
|
2
|
2
|
2
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3
|
Surface Treatments
The low hardness (HRC 56 maximum) A-11LV tends to be too low for CVD TiN coating to adhere during use.
Annealing
Heat to 1650F (900C), hold 2 hours, slow cool 30F (15C)/hour maximum) to 1000F (540C), air cool.
Typical annealed hardness: 223/255 BHN.
Stress Relieving
Annealed Material: Heat to 1100/1300F(595/740C), hold two hours, cool in still air.
Hardened Material: Heat to 25F(15C) below original tempering temperature, hold two hours, cool in still air.
Welding
Because of its high alloy content, repair welding of A-11LV entails an inherent risk of cracking, either during welding, or in subsequent service. If welding is required, A-11LV should be carefully preheated and post-heated, and handled like a high-alloy high speed steel grade.
Weld filler selection depends on the functional requirements of the welded area. Non-working areas may be welded using H13 rod; high wear areas may require using higher alloyed filler material, such as M2 high speed steel.
Annealed Material: Preheat 800/1000F(425/540C), maintain over 600F(315C) during welding. Reanneal or temper 1550F(845C) 6 hours after welding.
Hardened Material: Preheat to 800/1000F(425/540C)Maintain above 600F(315C) during welding. Cool to 150F(65C) after welding. Temper twice 25F(15C) below original tempering temperature. Minimum 1000F(540C)
Physical Properties
| Modulus of Elasticity | 32psix10(6) | (221 GPa) |
| Density | 0.268 lb/in3 | (7695 kg/M3) |
| Thermal Conductivity | 15 BTU/hr./ft./F | 26 W/m/ °K) |
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