ASTM A686 Norms for Tool Steel, Carbon Steel

ASTM A 686 Specifications For Tool Steel, Carbon Steel

Chemical Composition, %A

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A Chemistry limits include product analysis tolerances.
B The carbon ranges for W1 and their respective suffix identification, sometimes referred to as tempers, are as follows:
       
Suffix Carbon Range, % Suffix Carbon Range, %
8 0.80–0.90 10 1.00–1.10
8½ 0.85–0.95 10½ 1.05–1.15
9 0.90–1.00 11 1.10–1.20
9½ 0.95–1.05 11½ 1.15–1.25

C The carbon ranges for W2 and their respective suffix identification are as follows:

   
Suffix Carbon Range, %
8½

0.85–0.95
9 0.90–1.00
9½ 0.95–1.10
13 1.30–1.50


Maximum Brinell Hardness in Annealed or Cold Drawn Condition

Type Annealed BHN Cold Drawn BHN
W1 202 241
W2 202 241
W5 202 241

Drill Rod (W1, W2, or W5)
Ordered Diameter, in. (mm) Brinell Rockwell
To 1⁄8 (3.2) HB 341 HRC 37
Over 1⁄8 to 1⁄4 (3.2 to 6.4), incl HB 275 HRC 28
Over 1⁄4 to 1⁄2 (6.4 to 12.7), incl HB 241 HRC 23
Over 1⁄2 (12.7) HB 207 HRB 96


Heat-Treating Requirements

Type

Carbon Range, %

 Austenitizing Temperature, °F (°C) Quench Medium Minimum Hardness, HRC
W1 0.70–0.85 1475 (802) brine 64
0.85–0.95 1475 (802) brine 65
0.95–1.50 1450 (788) brine 65
W2 0.85–0.95 1475 (802) brine 65
0.95–1.50 1450 (788) brine 65
W5 1.05–1.15 1475 (802) brine 65
 

Hardness Penetration and Fracture Grain Size for Grade A
Specified
Depth of
Hardening		 Quench
Temperature,
° F (°C)		 W1 (0.70 to 0.95 C) W2 (0.85 to 0.95 C) A W1 (0.95 to 1.10 C)
W2 (0.95 to 1.10 C) A		 W1 (1.10 to 1.30 C) A

Penetration 64th in.

 Grain Size
(Shepherd) Not
Coarser Than

Penetration 64th in.

 Grain Size
(Shepherd) Not
Coarser Than
Shallow 1450 (788) 10 max 8 8 max 81⁄2
1550 (843) not more than 5⁄64 deeper 61⁄2 not more than 5⁄64 deeper 61⁄2
than at 1450 than at 1450
Regular 1450 (788) 9 to 13 8 7 to 11 81⁄2
1550 (843) not more than 8⁄64 deeper 61⁄2 not more than 8⁄64 deeper 61⁄2
than at 1450 than at 1450
Deep 1450 (788) 12 min 8 10 to 16 8
1550 (843) not more than 10⁄64 deeper 61⁄2 not more than 10⁄64 deeper 61⁄2
than at 1450 than at 1450


Hot Rolled Bars Rounds, Squares, Octagons, 
Quarter Octagons, Hexagons Size Tolerances A

Specified Sizes, in. (mm) Size Tolerances, in. (mm)
Under Over
To 1⁄2 (12.7), incl 0.005 (0.13) 0.012 (0.30)
Over 1⁄2 to 1 (12.7 to 25.4), incl 0.005 (0.13) 0.016 (0.41)
Over 1 to 11⁄2 (25.4 to 38.1), incl 0.006 (0.15) 0.020 (0.51)
Over 11⁄2 to 2 (38.1 to 50.8), incl 0.008 (0.20) 0.025 (0.64)
Over 2 to 21⁄2 (50.8 to 63.5), incl 0.010 (0.25) 0.030 (0.76)
Over 21⁄2 to 3 (63.5 to 76.2), incl 0.010 (0.25) 0.040 (1.02)
Over 3 to 4 (76.2 to 101.6), incl 0.012 (0.30) 0.050 (1.27)
Over 4 to 51⁄2 (101.6 to 139.7), incl 0.015 (0.38) 0.060 (1.52)
Over 51⁄2 to 61⁄2 (139.7 to 165.1), incl 0.018 (0.46) 0.100 (2.54)
Over 61⁄2 to 8 (165.1 to 203.2), incl 0.020 (0.51) 0.150 (3.81)


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