Eastern Tool
Steel Service, Inc.

1045 Delaum Rd.

P.O. Box 857

St. Marys, Pa 15857

Phone: (814) 834-7224
Fax: (814) 834-7225
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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%
Silicon0.90%

Typical Applications

Blanking DiesWarm Work Tooling
Forming RollsTrim/Shear Dies
Nozzles and Screw TipsPunches
Plastic Injection MoldingWear Inserts
Powder Compaction Punches


PM Tool Steel Comparison Chart

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

C
 

F
 

(1025C)

(1040C)

(1065C)

(1120C)


As Quenched

53

56

56

58

540

1000

52

53

54

56

OPTIMUM FOR MAXIMUM TOUGHNESS AND EFFECTIVE STRESS-RELIEVING.

550

1025

51

52

53

55

565

1050

50

51

52

53

595

1100

46

47

49

51

620

1150

39

40

43

46

650

1200

33

34

37

40


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)
 

60

45

30

20

MINIMUM NUMBER
OF TEMPERS (2 HRS)
 

2

2

2

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 Elasticity32psix10(6)(221 GPa)
Density0.268 lb/in3(7695 kg/M3)
Thermal Conductivity15 BTU/hr./ft./F26 W/m/ K)

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