ASTM A453 Grade 660 Bolts | SA 453 Gr 660 Class A Hex Bolt/ Stud/ Nuts

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SA 453 Gr 660 Hex Bolt & ASTM A453 Stud Bolt manufacturer in India

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

UNS S66286 A453 Gr 660 Nuts and A453 660B Heavy Hex Bolts material exporter and supplier in Mumbai

ASTM A453 Grade 660 Bolts Price List India
A286 UNS S66286 Bolts Marking
ASTM A453 Grade 660 Fasteners Specifications
Types of SA 453 Gr 660 Bolts
ASTM A453 GRADE 660A Nuts Types
Incoloy Alloy A286 Screws Types
Types of ASTM A453 GRADE 660B Threaded Rod and Studs
Different types of A286 UNS S66286 Washers
ASTM A638 grade 660 Type 1 Hex Bolt Dimensions Metric
A453 Gr 660 Stud Bolt Metric Dimensions
ASTM A638 Gr 660 Type 2 Hex Nut Dimensions Metric
Grade 660 Washer Dimensions
ASTM A891 TYPE 2 Fasteners Chemical Composition
A453 660B Bolts Mechanical Properties
ASTM A453 Grade 660 Class A Nut Bolt Equivalent Grade
A453 Gr 660 Stainless Steel Bolts Melting Range

ASTM A453 Grade 660 Bolts Price List India

Check latest price list of Alloy A286 Grade 660 Threaded Rod and ASTM A453 660 Larger size Bolts/ Nuts/ Washers ex Mumbai with EN 10204 Type 3.1 MTC

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.

A286 UNS S66286 Bolts Marking

Grade	Class A	Class B	Class C	Class D
Grade 660	JS 660A	JS 660B	JS 660C	JS 660D NR

ASTM A453 Grade 660 Fasteners Specifications

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	ASME SA 453/ ASTM A453 GRADE 660A ASME SA 453/ ASTM A453 GRADE 660B ASME SA 453/ ASTM A453 GRADE 660C ASME SA 453/ ASTM A453 GRADE 660D ASME SA 286/ ASTM A286 GRADE 660A ASME SA 286/ ASTM A286 GRADE 660B ASME SA 286/ ASTM A286 GRADE 660C ASME SA 286/ ASTM A286 GRADE 660D ASME SA 638/ ASTM A638 TYPE1 ASME SA 638/ ASTM A638 TYPE2 ASME SA 891/ ASTM A891 TYPE1 ASME SA 891/ ASTM A891 TYPE2
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	Dia: M10 - M110 Length: 12 - 1200MM
ASTM A453 GRADE 660A Hex Bolts Size Inch	Dia: 1/2" - 4.0" Length: 1/2" - 52"
Incoloy Alloy A286 Eye Bolts Metric Size	Dia: M10 - M48
ASTM A453 GRADE 660B Stud Bolt Metric Size	Dia: M10 - M110 Length: 12 mm - 6000 mm
A286 UNS S66286 Stud Bolt Inch	Dia: 1/2" - 4.1/2" Length: 1/2" - 236"
ASTM A638 grade 660 Type 1 Hex Nut (DIA)	Metric: M6 - M110 Inch: 1/4" - 4.5"
A453 Gr 660 Plain Washer (DIA)	Metric: M6 - M110 Inch: 1/2" - 4.1/2"
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	ANSI B 28.2.4 1M ANSI B 18.2.4 2M ASME B18.5 ASME B18.2.2
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	Zinc white, (yellow, black, blue), black oxide, Dacroment, Geometry, plated zinc-nickel, anodizing, nickel plated, Stainless steel: Passivated Self-Colour, Bright Zinc Plated (BZP), Hot Dip Galvanised (HDG), Sherardized, DACROMET and Mechanically Applied coating
A453 Gr 660 Stainless Steel Fasteners Production Process	M2-M24: Cold Forging, hot forging M24-M100, machining and CNC for Customized connecting element
Export Market	Dubai, UAE Sheffield, England Malaysia Houston, Texas Singapore Edmonton, Canada and others
ASTM A453 Grade 660 Bolts Coating	Xylon Coated Fasteners Phosphate Coated Fasteners Hot Dipped Galvanizing Coated Fasteners Teflon Coated Fasteners Zinc Coated Fasteners Cadmium Coated Fasteners Ptfe Coated (Teflon) Fasteners
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

Types of SA 453 Gr 660 Bolts

Wide range of ASTM A453 Grade 660 Class A Socket Head Cap Screws & ASTM A453 Gr 660 Bolts in India

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 660A Nuts Types

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

Incoloy Alloy A286 Screws Types

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

Types of ASTM A453 GRADE 660B Threaded Rod and Studs

Looking to buy A453 660 Bolts and Nuts at factory price? Buy direct from the manufacturer of ASTM A453 Gr 660 Stainless Steel Class A/B/C/D Nut Bolt Fasteners in India

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

Different types of A286 UNS S66286 Washers

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

ASTM A638 grade 660 Type 1 Hex Bolt Dimensions Metric

Hexagon Head Bolt BSF BS1083

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

A453 Gr 660 Stud Bolt Metric Dimensions

Stud Metal End =1.1/2 D 4H Metric Coarse BS 4439

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

ASTM A638 Gr 660 Type 2 Hex Nut Dimensions Metric

Hexagon Heavy Nut UNC B18.2.2

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

Grade 660 Washer Dimensions

Flat Washer Metric DIN 125A 125

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

ASTM A891 TYPE 2 Fasteners Chemical Composition

ELEMENT	Grade 660	Grade 651	Grade 662	Grade 665	Grade 668
ELEMENT	%	%	%	%	%
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	…

A453 660B Bolts Mechanical Properties

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

ASTM A453 Grade 660 Class A Nut Bolt Equivalent Grade

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	EN 1.4944 EN 1.4943 EN 1.4980
European Name	X5NiCrTi26-15 X4NiCrTi25-15 X6NiCrTiMoVB25-15-2
ASTM	ASTM A891 (Type 1, 2) ASTM A638 (Grade 660 Type 1, 2) ASTM A453 (Grade 660 Class A, B, C, D)
ASME	ASME SA 891 (Type 1, 2) ASME SA 638 (Grade 660 Type 1, 2) ASME SA 453 (Grade 660 Class A, B, C, D)
GE	GE B50T1181C GE B50T12A&C GE B50T81A&C GE C50TF78 GE C50TF27 GE C50TF20
AMS	A286 AMS 5726 A286 AMS 5731 A286 AMS 5732 A286 AMS 5734 A286 AMS 5735 A286 AMS 5736 A286 AMS 5737 A286 AMS 5853 A286 AMS 5895
Other Compliance	UNS S66286 SAE J467-A286 EN 2399 PWA-LCS GE-S400/1000 RR SABRe Edition 2 DFARS Compliant SPS M-118 Fairchild MS 301 314 Elliott Turbine MS 618 Weatherford WS-881 Cameron MS-003030

A453 Gr 660 Stainless Steel Bolts Melting Range

2500 - 2600 °F
1371 - 1427 °C

Stree Rupture

Bolts Grade	Class Property	Test Temperature	Stress, Min		Time to Rupture	Elongation
Bolts Grade	Class Property	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
665	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