Bolts &Nuts

Bolts & Nuts

We are manufacturer of Flange bolts & Nuts and supply high quality Flange bolts & Nuts in both large and small quantities worldwide and offer you the best prices in the market.

A flange nut is a nut that has a wide flange at one end that acts as an integrated, non-spinning washer.

We have a team of experienced professionals with years of experience in manufacturing.

We are manufacturer of Flange bolts & Nuts and supply high quality

ASTM A453

ASTM A453 Grade 660 is a material specification for studs, bolts, nuts and other fasteners, intended for use in high temperature bolting applications.

ASTM A453 Grade 660 is classified into 4 property class namely A, B, C & D, each designated with different tensile and stress rupture properties. Grade 660 fasteners are used in bolting boilers, pressure vessels, pipeline flanges and valves, intended for high temperature service. ASTM A453 grade 660 material is chemically equivalent to ASTM B638 grade 660 stainless steel alloy, also known by alloy A286 and UNS S66286, heat treated to achieve properties defined in ASTM A453 specification.

Find more information on chemical composition, mechanical properties, tensile class, heat treatment definition, available products, bar stock sizes, applicable dimension standards, etc.

Grade Class Tensile Strength, 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
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
r>
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

 

A cross fitting allows four direction transition in pipeline fields.



Fitting specification, Standard and identification

There are different varieties of pipe fittings made of various materials and available in various shapes and sizes.



SUNNY STEEL

Our team are highly trained and experienced in servicing and producing all types of steel supplies. Whether you've got a large construction project, or need parts for industrial machinery, our team of steel fabrication consultants will ensure that your project is provided with the parts you need, when you need them.

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