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ASTM A453 Grade 660 Class D Bolts

astm-a453-grade-660-Class-D-stud-boltsASTM A453 Covers Specification for High temperature Bolting with expansion co-efficient comparable to Austenitic Stainless Steel. We produce A453 Grade 660 Class D Stud Bolts, Hex Bolts ,Expansion bolts,threaded rods etc. intended for Special Engineering Applications .TorqBolt Manufactures , Stocks & Supply these A453 Grade 660 Class D StudBolts, Bolting in various sizes & Coatings.

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Grades & Classes

Grade 660 Class A Class B Class C Class D
Grade 651 Class A Class B    
Grade 662 Class A Class B    
Grade 665 Class A Class B    
Grade 668 Class A Class B    

 

Material Chemical Composition Requirements

ELEMENT Grade 660 Grade 651 Grade 662 Grade 665 Grade 668
% % % % %
Carbon 0.08 max 0.28-0.35 0.08 max 0.08 max 0.08 max
Manganese 2.00 max 0.75-1.5 0.40-1.00 1.25-2.00 2.00 max
Phosphorus, max 0.040 max 0.040 max 0.040 max 0.040 max 0.040 max
Sulfur, max 0.030 max 0.030 max 0.030 max 0.030 max 0.030 max
Silicon 1.00 max 0.30-0.80 0.40-1.00 0.1-0.80 1.00 max
Nickel 24.0-27.0 8.0-11.0 24.0-28.0 24.0-28.0 17.5-21.5
Chromium 13.5-16.0 18.0-21.0 12.0-15.0 12.0-15.0 13.5-16.0
Molybdenum 1.00-1.50 1.00-1.75 2.0-3.50 1.25-2.25 1.50 max
Tungsten ... 1.00-1.75 ... ... ...
Titanium 1.9-2.35 0.1-0.35 1.80-2.10 2.70-3.30 2.20-2.80
Columbium * ... 0.25-0.6 ... ... ...
Aluminum 0.35 max   0.35 max 0.25 max 0.50 max
Vanadium 0.10-0.50   ... ... 0.50 max
Boron 0.001-0.010   0.001-0.010 0.01-0.07 0.001-0.010
Copper   0.50 max 0.50 max 0.25 max ...

 

Mechanical Properties Requirements

Size Class Tensile, Mpa Yield, Mpa Elong. %, min RA %, min
Grade 660 A, B , & C 895 min 585 min 15 18
  D 895 min 725 min 15 18
Grade 651 A 690 min 485 min 18 35
415 min
  B 655 min 415 min 18 35
345 min
Grade 662 A 895 min 585 min 15 18
  B 860 min 550 min 15 18
Grade 665 A 1170 min 830 min 12 15
  B 1070 min 830 min 12 15
Grade 665 A & B 895 min 858 min 15 18

 

Heat Treatment Requirements

Grade Class Solutiona Treatment Hardening Treatment
660 A 1650 +/- 25 °F [900 +/-14 °C], hold 2 h, min and liquid quench 1325 +/- 25 °F [720 +/- 14 °C] 16h, air cool
B 1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and liquid quench 1325 +/- 25 °F [720 +/- 14 °C] 16h, air cool
C 1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and oil quench 1425 +/- 25 °F [775 +/- 14 °C] hold 16h, air cool followed by 1200 +/- 25 °F [650 +/- 14 °C], hold 16h, air cool
D 1650 +/- 25 °F [900 +/-14 °C], hold 2 h, min and liquid quench OR

1325 +/- 25 °F [720 +/- 14 °C] hold 16h, air cool followed by 1200 +/- 25 °F [650 +/- 14 °C], hold 16h, air cool

if neccessary to achieve properties, second age : 1200 +/- 25 °F [650 +/- 14 °C] hold 16h, air cool

  1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and liquid quench
651 A   hot-cold worked at 1200 °F[650] min with 15% min reduction in cross sectional area, stress-relief anneal at 1200 °F [650 °C] min or 4h, min
B   hot-cold worked at 1200 °F[650] min with 15% min reduction in cross sectional area, stress-relief anneal at 1350 °F [730 °C] min or 4h, min
662 A 1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and liquid quench 1350 to 1400 °F [730 to 760 °C], hold 20h, furnace cool to 1200 +/- 25 °F [650 +/- 14 °C], hold 20h, air cool
B 1950 +/- 25 °F [1065 +/-14 °C], hold 2 h, min and liquid quench 1350 to 1400 °F [730 to 760 °C], hold 20h, furnace cool to 1200 +/- 25 °F [650 +/- 14 °C], hold 20h, air cool
665 A 1800 +/- 25 °F [980 +/-14 °C], hold 3 h, min and liquid quench 1350 to 1400 °F [730 to 760 °C], hold 20h, furnace cool to 1200 +/- 25 °F [650 +/- 14 °C], hold 20h, air cool
B 2000 +/- 25 °F [1095 +/-14 °C], hold 3 h, min and liquid quench 1350 to 1400 °F [730 to 760 °C], hold 20h, furnace cool to 1200 +/- 25 °F [650 +/- 14 °C], hold 20h, air cool
668 A 1650 +/- 25 °F [900 +/-14 °C], hold 2 h, min and liquid quench 1325 +/- 25 °F [720 +/- 14 °C] 16h, air cool
B 1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and liquid quench 1325 +/- 25 °F [720 +/- 14 °C] 16h, air cool

 

Stree Rupture Requirements

Grade Class Test Temperature Stress, Min Time to Rupture Elongation
Deg F [ Deg C ] Ksi Mpa Min, h* Min %
660 A, B & C 1200 [650] 56 385 100 5
651 A & B 1200 [650] 40 275 100 5
662 A & B 1200 [650] 55 380 100 5
665 A 1200 [650] 75 515 100 3
B 1200 [650] 70 485 100 5

 

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