Known to be as a precipitation hardening stainless steel, this alloy is an austenitic grade that maybe sometimes characterised as a nickel alloy. This is because of the ASTM A453 Grade 660 Bolts have a comparatively higher content of nickel in its alloy for any stainless steel. The ASTM A453 Grade 660 Class A Socket Head Cap Screws are extensively used as fastening for applications involving elevated temperature. Which is why many manufacturers recommend using grade ASTM A453 660 Larger size Bolts/ Nuts/ Washers for applications where the operating temperatures could rise up to 700°C.
Along with meeting the chemical requirements of the specification, the A453 660B Heavy Hex Bolts material is to be subjected to different tests. For instance, common tests include a tension test, stress-rupture test, as well as hardness tests. Moreover, the Alloy A286 Grade 660 Threaded Rod needs to conform to certain requirements like the yield and tensile strength. In addition to the aforementioned requirements, the UNS S66286 A453 Gr 660 Nuts must conform to the reduction of area, elongation, Brinell hardness, and Rockwell hardness. Each class under the ASTM A453 Stud Bolt specification are required to meet the hardening requirement and solution treatment requirements.
ASTM A453 Grade 660 Fasteners
ASTM A453 Grade 660 Bolts
ASTM A453 GRADE 660A Threaded Rod and Studs
Incoloy Alloy A286 Hex Bolt
ASTM A453 GRADE 660B Stud Bolt
A286 UNS S66286 Nuts
Material | Price in India |
---|---|
ASTM A 453/ A453M Grade 660 Nuts | INR 9,650/kg |
SA 453 Gr 660 Studs with 2 Nuts, CL A, UNC, Size: 1-1/4 X 9 | INR 10,440/kg |
A453 Gr 660A Heavy Hex Nuts, Size : 7/8-9 | INR 1,828/kg |
Call us or send us an email to sales@jigneshsteel.com for more price ex Mumbai.
Grade | Class A | Class B | Class C | Class D |
---|---|---|---|---|
Grade 660 | JS 660A | JS 660B | JS 660C | JS 660D NR |
Other Trade Name: GRADE 660, ASTM A286, UNS S66286, A453 (VO1.01), ASTM A638 (VO1.03), Incoloy A286, Alloy A286, NAS 660, ATI A286
ASTM Specification | A453 / A638 / A891 |
ASME / ASTM Grades |
|
AMS | 5726, 5731, 5732, 5734, 5735, 5736, 5737, 5853, 5895, 5525, 5858 |
ASTM A453 Grade 660 Bolts | Class A/ B/ C/ D |
SA 453 Gr 660 Hex Bolts Size Metric |
|
ASTM A453 GRADE 660A Hex Bolts Size Inch |
|
Incoloy Alloy A286 Eye Bolts Metric Size |
|
ASTM A453 GRADE 660B Stud Bolt Metric Size |
|
A286 UNS S66286 Stud Bolt Inch |
|
ASTM A638 grade 660 Type 1 Hex Nut (DIA) |
|
A453 Gr 660 Plain Washer (DIA) |
|
ASTM A453 Grade 660 Bolts International Standard | IS, ANSI, ASTM DIN, ISO, JIS, GB, ASME, BS, UNI |
ASTM A638 Gr 660 Type 2 Bolts Standard Sizes | M10, M4, M16, M36 M2.5, M6, M30, M12, M8, M14, M2, M3, M20, M24, M5 to M160 |
Grade 660 Fasteners Threads | BSF, UNF METRIC, UNC, UNEF, BSW or as required |
ASME/ ANSI - American Standard ASTM A453 Grade 660 Bolts |
|
DIN German Standard ASTM A453 Grade 660 Bolts | DIN 933, DIN 931, DIN 970, DIN 934 |
ISO Standard ASTM A891 TYPE 2 Bolts | ISO 4033, : ISO 4032, JIS standards |
A453 660B Bolts / Screws Head Drive | Phillips, Slotted, Phillips/Slot, Six-Lobe |
MTC (Manufacturer Test Certificate) | EN 10204 / 3.1 |
ASTM A453 Grade 660 Class A Nut Bolt Finishing |
|
A453 Gr 660 Stainless Steel Fasteners Production Process |
|
Export Market |
|
ASTM A453 Grade 660 Bolts Coating |
|
ASTM A286 Grade 660 Fasteners Packing | Wooden Pallet, Canton, Carton / Small Box or as required |
Other requirements | NACE MR-0175 , Cameron MS-003030 314 Elliott Turbine MS 618 Fairchild MS 301 Weatherford WS-881 |
Application | Gas Turbine, Jet Engine, Oil & Gas Industry |
ASTM A453 Grade 660 Flange Bolts
SA 453 Gr 660 Heavy Hex Bolts
ASTM A453 GRADE 660A Hex Bolts
Incoloy Alloy A286 Square Bolts
ASTM A453 GRADE 660B U Bolts
A286 UNS S66286 Eye Bolts
ASTM A453 Grade 660 Lag Bolts
SA 453 Gr 660 Anchor Bolts
ASTM A453 GRADE 660A Hex Head Bolts
Incoloy Alloy A286 Carriage Bolts
ASTM A453 GRADE 660B Allen Cap Bolt
A286 UNS S66286 Countersunk Bolts
ASTM A453 Grade 660 Eye Nuts
SA 453 Gr 660 Heavy Hex Nuts
ASTM A453 GRADE 660A Hex Nuts
Incoloy Alloy A286 Jam Nuts
ASTM A453 GRADE 660B Lock Nuts
A286 UNS S66286 Panel Nuts
ASTM A638 grade 660 Type 1 Square Nuts
A453 Gr 660 T-Nuts For Wood
ASTM A638 Gr 660 Type 2 Wheel Nuts and Caps
Grade 660 Wing Nuts
ASTM A891 TYPE 2 Cage Nuts and Spring Nuts
A453 660B Self Locking Nuts
ASTM A453 Grade 660 Class A Tek Screws
A453 Gr 660 Stainless Steel Deck Screws
ASTM A286 Grade 660 Concrete Screws
ASTM A453 Socket Head Cap Screw
ASTM A453 Grade 660 Eye Screw
SA 453 Gr 660 Thumb Screw
ASTM A453 GRADE 660A Wood Screw
Incoloy Alloy A286 Coach Screw
ASTM A453 GRADE 660B Hex Head Lag Screw
A286 UNS S66286 12-Point Flange Head Cap Screws
ASTM A638 grade 660 Type 1 Wing Screw
A453 Gr 660 Captive Panel Screws
ASTM A638 Gr 660 Type 2 Hex Cap Screw
Grade 660 Allen Cap Screw
ASTM A891 TYPE 2 Grub Screw
A453 660B Fully Threaded Screw
ASTM A453 Grade 660 Class A Torx Screw
A453 Gr 660 Stainless Steel Pan Head Screw
ASTM A286 Grade 660 Truss Head Screw
ASTM A453 Flat Head Screw
ASTM A453 Grade 660 Stud Bolts
SA 453 Gr 660 Double Ended Studs
ASTM A453 GRADE 660A Tie Rod
Incoloy Alloy A286 Fully Threaded Studs
ASTM A453 GRADE 660B Threaded Rod
A286 UNS S66286 Unc Stud Bolt
ASTM A453 Grade 660 Cup Washer
SA 453 Gr 660 Square Washer
ASTM A453 GRADE 660A Lock Washer
Incoloy Alloy A286 Countersunk Washer
ASTM A453 GRADE 660B Belleville Washer
A286 UNS S66286 Shim Washer
ASTM A638 grade 660 Type 1 Square Plate Washer
A453 Gr 660 Square Washer
ASTM A638 Gr 660 Type 2 Penny Washer
Grade 660 Machine Washers
Polished ASTM A891 TYPE 2 Washer
A453 660B Ring Washers
d | e | s max | s min | k max | k min | f Max | f Min | g Max | g Min |
---|---|---|---|---|---|---|---|---|---|
1/4" | 0.5100 | 0.4450 | 0.4380 | 0.1760 | 0.1660 | 0.2500 | 0.2470 | 0.4280 | 0.4180 |
5/16" | 0.6100 | 0.5250 | 0.5180 | 0.2180 | 0.2080 | 0.3130 | 0.3090 | 0.5080 | 0.4980 |
3/8" | 0.6900 | 0.6000 | 0.5920 | 0.2600 | 0.2500 | 0.3750 | 0.3720 | 0.5820 | 0.5720 |
7/16" | 0.8200 | 0.7100 | 0.7020 | 0.3020 | 0.2920 | 0.4380 | 0.4340 | 0.6900 | 0.6800 |
1/2" | 0.9500 | 0.8200 | 0.8120 | 0.3430 | 0.3330 | 0.5000 | 0.4960 | 0.8000 | 0.7900 |
9/16" | 1.0600 | 0.9200 | 0.9120 | 0.3750 | 0.3650 | 0.5630 | 0.5590 | 0.9000 | 0.8900 |
5/8" | 1.1700 | 1.0100 | 1.0000 | 0.4170 | 0.4070 | 0.6250 | 0.6190 | 0.9850 | 0.9750 |
3/4" | 1.3900 | 1.2000 | 1.1900 | 0.5000 | 0.4800 | 0.7500 | 0.7440 | 1.1750 | 1.1650 |
7/8" | 1.5000 | 1.3000 | 1.2880 | 0.5830 | 0.5630 | 0.8750 | 0.8670 | 1.2730 | 1.2630 |
1" | 1.7100 | 1.4800 | 1.4680 | 0.6660 | 0.6360 | 1.0000 | 0.9920 | 1.4530 | 1.4330 |
1.1/8" | 1.9300 | 1.6700 | 1.6400 | 0.7500 | 0.7100 | 1.1250 | 1.1170 | 1.6200 | 1.6100 |
1.1/4" | 2.1500 | 1.8600 | 1.8150 | 0.8300 | 0.7900 | 1.2500 | 1.2420 | 1.7950 | 1.7850 |
1.3/8" | 2.3700 | 2.0500 | 2.0050 | 0.9200 | 0.8800 | 1.3750 | 1.3650 | 1.9850 | 1.9750 |
1.1/2" | 2.5600 | 2.2200 | 2.1750 | 1.0000 | 0.9600 | 1.5000 | 1.4900 | 2.1550 | 2.1450 |
1.3/4" | 2.9800 | 2.5800 | 2.5200 | 1.1700 | 1.1100 | 1.7500 | 1.7400 | 2.4950 | 2.4850 |
2" | 3.1900 | 2.7600 | 2.7000 | 1.3300 | 1.2700 | 2.0000 | 1.9900 | 2.6750 | 2.6650 |
d | b | c l<125 | c l<125<200 | c l 200> |
---|---|---|---|---|
M3 | 5.0000 | 12.0000 | 18.0000 | |
M4 | 6.0000 | 14.0000 | 20.0000 | |
M5 | 8.0000 | 16.0000 | 22.0000 | |
M6 | 9.0000 | 18.0000 | 24.0000 | 37.0000 |
M7 | 11.0000 | 20.0000 | 26.0000 | 39.0000 |
M8 | 12.0000 | 22.0000 | 28.0000 | 41.0000 |
M10 | 15.0000 | 26.0000 | 32.0000 | 45.0000 |
M12 | 18.0000 | 30.0000 | 36.0000 | 49.0000 |
M14 | 21.0000 | 34.0000 | 40.0000 | 53.0000 |
M16 | 24.0000 | 38.0000 | 44.0000 | 57.0000 |
M18 | 27.0000 | 42.0000 | 48.0000 | 61.0000 |
M20 | 30.0000 | 46.0000 | 52.0000 | 65.0000 |
M22 | 33.0000 | 50.0000 | 56.0000 | 69.0000 |
M24 | 36.0000 | 54.0000 | 60.0000 | 73.0000 |
M27 | 41.0000 | 60.0000 | 66.0000 | 79.0000 |
M30 | 45.0000 | 66.0000 | 72.0000 | 85.0000 |
M33 | 50.0000 | 72.0000 | 78.0000 | 91.0000 |
M36 | 54.0000 | 78.0000 | 84.0000 | 97.0000 |
D | D | s | s max | s min | e max | e min | m | m max | m min |
---|---|---|---|---|---|---|---|---|---|
1/4" | 0.2500 | 1/2" | 0.5000 | 0.4880 | 0.5770 | 0.5560 | 15/64" | 0.2500 | 0.2180 |
5/16" | 0.3125 | 9/16" | 0.5620 | 0.5460 | 0.6500 | 0.6220 | 19/64" | 0.3140 | 0.2800 |
3/8" | 0.3750 | 11/16" | 0.6880 | 0.6690 | 0.7940 | 0.7630 | 23/64" | 0.3770 | 0.3410 |
7/16" | 0.4375 | 3/4" | 0.7500 | 0.7280 | 0.8660 | 0.8300 | 27/64" | 0.4410 | 0.4030 |
1/2" | 0.5000 | 7/8" | 0.8750 | 0.8500 | 1.0100 | 0.9690 | 31/64" | 0.5040 | 0.4640 |
9/16" | 0.5625 | 15/16" | 0.9380 | 0.9090 | 1.0830 | 1.0370 | 35/64" | 0.5680 | 0.5260 |
5/8" | 0.6250 | 1.1/16" | 1.0620 | 1.0310 | 1.2270 | 1.1750 | 39/64" | 0.6310 | 0.5870 |
3/4" | 0.7500 | 1.1/4" | 1.2500 | 1.2120 | 1.4430 | 1.3820 | 47/64" | 0.7580 | 0.7100 |
7/8" | 0.8750 | 1.7/16" | 1.4380 | 1.3940 | 1.6600 | 1.5890 | 55/64" | 0.8850 | 0.8330 |
1" | 1.0000 | 1.5/8" | 1.6250 | 1.5750 | 1.8760 | 1.7960 | 63/64" | 1.0120 | 0.9560 |
1.1/8" | 1.1250 | 1.13/16" | 1.8120 | 1.7560 | 2.0930 | 2.0020 | 1.7/64" | 1.1390 | 1.0790 |
1.1/4" | 1.2500 | 2" | 2.0000 | 1.9380 | 2.3090 | 2.2090 | 1.7/32" | 1.2510 | 1.1870 |
1.3/8" | 1.3750 | 2.3/16" | 2.1880 | 2.1190 | 2.5260 | 2.4160 | 1.11/32" | 1.3780 | 1.3100 |
1.1/2" | 1.5000 | 2.3/8" | 2.3750 | 2.3000 | 2.7420 | 2.6220 | 1.15/32" | 1.5050 | 1.4330 |
1.5/8" | 1.6250 | 2.9/16" | 2.5620 | 2.4810 | 2.9590 | 2.8280 | 1.19/32" | 1.6320 | 1.5560 |
1.3/4" | 1.7500 | 2.3/4" | 2.7500 | 2.6620 | 3.1750 | 3.0350 | 1.23/32" | 1.7590 | 1.6790 |
1.7/8" | 1.8750 | 2.15/16" | 2.9380 | 2.8440 | 3.3920 | 3.2420 | 1.27/32" | 1.8860 | 1.8020 |
2" | 2.0000 | 3.1/8" | 3.1250 | 3.0250 | 3.6080 | 3.4490 | 1.31/32" | 2.0130 | 1.9250 |
2.1/4" | 2.2500 | 3.1/2" | 3.5000 | 3.3880 | 4.0410 | 3.8620 | 2.13/64" | 2.2510 | 2.1550 |
2.1/2" | 2.5000 | 3.7/8" | 3.8750 | 3.7500 | 4.4740 | 4.2750 | 2.29/64" | 2.5050 | 2.4010 |
2.3/4" | 2.7500 | 4.1/4" | 4.2500 | 4.1120 | 4.9070 | 4.6880 | 2.45/64" | 2.7590 | 2.6470 |
3" | 3.0000 | 4.5/8" | 4.6250 | 4.4750 | 5.3400 | 5.1020 | 2.61/64" | 3.0130 | 2.8930 |
3.1/4" | 3.2500 | 5" | 5.0000 | 4.8380 | 5.7740 | 5.5150 | 3.3/16" | 3.2520 | 3.1240 |
3.1/5" | 3.5000 | 5.3/8" | 5.3750 | 5.2000 | 6.2070 | 5.9280 | 3.7/16" | 3.5060 | 3.3700 |
3.3/4" | 3.7500 | 5.3/4" | 5.7500 | 5.5620 | 6.6400 | 6.3410 | 3.11/16" | 3.7600 | 3.6160 |
4" | 4.0000 | 6.1/8" | 6.1250 | 5.9250 | 7.0730 | 6.7550 | 3.15/16" | 4.0140 | 3.8620 |
D | d1 | d2 | h |
---|---|---|---|
M1 | 1.1000 | 3.0000 | 0.3000 |
M1.2 | 1.3000 | 3.5000 | 0.3000 |
M1.4 | 1.5000 | 4.0000 | 0.3000 |
M1.6 | 1.7000 | 4.0000 | 0.3000 |
M1.7 | 1.8000 | 4.5000 | 0.3000 |
M2 | 2.2000 | 5.0000 | 0.3000 |
M2.3 | 2.5000 | 6.0000 | 0.5000 |
M2.5 | 2.7000 | 6.0000 | 0.5000 |
M2.6 | 2.8000 | 7.0000 | 0.5000 |
M3 | 3.2000 | 7.0000 | 0.5000 |
M3.5 | 3.7000 | 8.0000 | 0.5000 |
M4 | 4.3000 | 9.0000 | 0.8000 |
M5 | 5.3000 | 10.0000 | 1.0000 |
M6 | 6.4000 | 12.0000 | 1.6000 |
M7 | 7.4000 | 14.0000 | 1.6000 |
M8 | 8.4000 | 16.0000 | 1.6000 |
M10 | 10.5000 | 20.0000 | 2.0000 |
M12 | 13.0000 | 24.0000 | 2.5000 |
M14 | 15.0000 | 28.0000 | 2.5000 |
M16 | 17.0000 | 30.0000 | 3.0000 |
M18 | 19.0000 | 34.0000 | 3.0000 |
M20 | 21.0000 | 37.0000 | 3.0000 |
M22 | 23.0000 | 39.0000 | 3.0000 |
M24 | 25.0000 | 44.0000 | 4.0000 |
M27 | 28.0000 | 50.0000 | 4.0000 |
M30 | 31.0000 | 56.0000 | 4.0000 |
M33 | 34.0000 | 60.0000 | 5.0000 |
M36 | 37.0000 | 6.0000 | 5.0000 |
M39 | 40.0000 | 72.0000 | 6.0000 |
M42 | 43.0000 | 78.0000 | 7.0000 |
M45 | 46.0000 | 85.0000 | 7.0000 |
M48 | 50.0000 | 92.0000 | 8.0000 |
M52 | 54.0000 | 98.0000 | 8.0000 |
M55 | 57.0000 | 105.0000 | 9.0000 |
M56 | 58.0000 | 105.0000 | 9.0000 |
M58 | 60.0000 | 110.0000 | 9.0000 |
M60 | 62.0000 | 110.0000 | 9.0000 |
M64 | 66.0000 | 115.0000 | 9.0000 |
M68 | 70.0000 | 120.0000 | 10.0000 |
M72 | 74.0000 | 125.0000 | 10.0000 |
M76 | 78.0000 | 135.0000 | 10.0000 |
M80 | 82.0000 | 140.0000 | 12.0000 |
M85 | 87.0000 | 145.0000 | 12.0000 |
M90 | 93.0000 | 160.0000 | 12.0000 |
M95 | 98.0000 | 165.0000 | 12.0000 |
M100 | 104.0000 | 175.0000 | 14.0000 |
M105 | 109.0000 | 180.0000 | 14.0000 |
M110 | 114.0000 | 185.0000 | 14.0000 |
M115 | 119.0000 | 200.0000 | 14.0000 |
M120 | 124.0000 | 210.0000 | 16.0000 |
M125 | 129.0000 | 220.0000 | 16.0000 |
M130 | 134.0000 | 230.0000 | 16.0000 |
M135 | 139.0000 | 230.0000 | 16.0000 |
M140 | 144.0000 | 240.0000 | 18.0000 |
M145 | 149.0000 | 250.0000 | 18.0000 |
M150 | 155.0000 | 250.0000 | 18.0000 |
M160 | 165.0000 | 250.0000 | 18.0000 |
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 |
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 | … | … | … |
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 |
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 | … |
Grade | Class | Tensile Stress, min | Yield Strength, min | Elongation % | ||
---|---|---|---|---|---|---|
ksi | Mpa | ksi | Mpa | |||
660 | A, B, and C | 130 | 895 | 85 | 585 | 15 |
D | 130 | 895 | 105 | 725 | 15 | |
651 | A | 100 | 690 | 70 A | 485 | 18 |
60B | 415 | |||||
B | 95 | 655 | 60A | 415 | 18 | |
50B | 345 | |||||
662 | A | 130 | 895 | 85 | 585 | 15 |
B | 125 | 860 | 80 | 550 | 15 | |
665 | A | 170 | 1170 | 120 | 830 | 12 |
B | 155 | 1070 | 120 | 830 | 12 | |
668 | A and B | 130 | 895 | 85 | 585 | 15 |
Grade | UNS | BS | Wr No. | En Name | DIN EN | JIS | AMS | ASTM | other names | Additional Requirements | |
---|---|---|---|---|---|---|---|---|---|---|---|
660 | S 66286 | HR 51 HR 650 |
1.4944 1.4980 |
X6NiCrTiMoV26-15 | 10269 / 2399 | SUS 660 | 5726 | ASTM A453 GRADE 660A | Incoloy A286 | NACE MR-0175 |
Werkstoff Numbers |
|
European Name |
|
ASTM |
|
ASME |
|
GE |
|
AMS |
|
Other Compliance |
|
Stree Rupture
Bolts Grade | Class Property | 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 |
Heat Treatment
Grade | Class Property | Solutiona Treatment | Hardening Treatment |
Gr. 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 |