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ASTM A193 GR B7 Bolts

ASTM A193 Grade B7 Bolts, Alloy Steel Stud Bolts, Heavy Hex Bolts & B7 Bolting Supplier in Mumbai, India

Unifit Metal Alloys is a manufacturer, supplier, stockist and exporter of ASTM A193 Grade B7 Bolts in Mumbai, India, supplying high-strength alloy steel bolting for demanding pressure, temperature and industrial service conditions. Grade B7 bolts are manufactured from chromium-molybdenum alloy steel and are commonly selected for flange connections, pressure equipment, valves and piping systems where dependable mechanical performance is required. We supply different diameters, lengths, thread configurations and finishes to meet standard as well as project-specific requirements.

ASTM A193 Grade B7 Bolts are produced from heat-treated alloy steel to provide high tensile strength and suitable hardness for heavy-duty bolting applications. Their mechanical properties make them suitable for assemblies exposed to elevated temperatures and high operating pressures. These bolts are frequently paired with compatible ASTM A194 nuts and used in bolted flange connections where reliable clamping force is essential.

ASTM A193 Grade B7 Bolts, Alloy Steel Stud Bolts, Heavy Hex Bolts & B7 Bolting Manufacturer and Supplier in Mumbai, India

Grade B7 bolting is widely used across oil and gas facilities, refineries, petrochemical plants, power-generation units, pressure vessels, pipelines, valves, heat exchangers and industrial processing equipment. The chromium-molybdenum composition provides the strength required for demanding service, while controlled heat treatment helps maintain the required mechanical characteristics.

At Unifit Metal Alloys, we supply ASTM A193 Grade B7 Bolts in various sizes, lengths, thread forms, grades and surface finishes according to customer requirements. We cater to maintenance requirements, bulk orders, fabrication work and industrial projects.

Get the Best Quote for ASTM A193 Grade B7 Bolts. We Stock ASTM A193 Grade B7 Bolts in Various Diameters, Lengths, Thread Sizes, Specifications and Surface Finishes. Contact Us Today for a Competitive Quote.

ASTM A193 GR B7 Bolts Specifications

Property Details
Standard ASTM A193 / ASME SA193
Grade B7 (also available: B7M, B16, B8, B8M)
Material / Alloy Chromium-Molybdenum Alloy Steel — AISI 4140, 4142, 4145
Heat Treatment Quenched & Tempered — min. tempering temp. 1150°F (620°C)
Bolt Dimensions Standard ASME B18.2.1, ASME B18.3
Thread Configuration ASME B1.1 (2A/3A) — UNC/UNF; ASME B1.13M 6h — Metric Coarse
Thread Note (Diameter > 1″) 8 TPI (threads per inch) for traditional applications
Size Range — Inch ¼″ to 4″; custom to 7″
Size Range — Metric M6 to M180
Certification Dual Certified ASTM & ASME; PED 97/23/EC; Merkblatt AD 2000 W2
NACE Compliance NACE MR0103; NACE MR0175 / ISO 15156
Recommended Nut ASTM A194 Grade 2H (standard); A194 Grade 2HM (sour service)
Operating Temp Range –50°C to +482°C (–58°F to +900°F)
Product Origin Made in India — Mumbai

Chemical Composition for ASTM A193 GR B7 Bolts

Element
B7 (AISI 4140)
Carbon
0.38 – 0.48%
Manganese
0.75 – 1.00%
Phosphorus, max
0.035%
Sulfur, max
0.040%
Silicon
0.15 – 0.35%
Chromium
0.80 – 1.10%
Nickel
Molybdenum
0.15 – 0.25%

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Weight Chart of ASTM A193 GR B7 Bolts

MM THREADS AS PER IS 1363/67
APPROXIMATE WEIGHT IN KGS FOR 100 NOS
LENGTH DIAMETER
M 5 M 6 M 8 M 10 M 12 M 14 M 16 M 18 M 20 M 22
16 mm 0.448 0.743 1.590 3.211
20 mm 0.598 0.812 1.711 3.411 4.892
25 mm 0.660 0.897 1.871 3.660 5.252 8.170
30 mm 0.737 1.010 2.070 3.912 5.574 9.690 10.707 18.657
35 mm 0.804 1.120 2.271 4.223 5.974 10.000 11.416 16.026 19.608
40 mm 0.881 1.230 2.470 4.533 6.410 10.288 12.107 16.667 20.747
45 mm 0.958 1.340 2.671 4.840 6.859 10.504 12.821 17.241 21.739
50 mm 1.030 1.450 2.870 5.155 7.299 11.261 13.624 17.857 22.727 28.409
55 mm 1.560 3.071 5.464 7.740 11.628 14.409 18.868 23.810 30.120
60 mm 1.670 3.270 5.774 8.183 12.255 15.244 20.000 25.126 32.051
65 mm 1.781 3.472 6.083 8.621 12.626 16.026 21.008 26.455 34.014
70 mm 1.890 3.671 6.394 9.058 12.987 16.835 22.124 27.778 35.461
75 mm 2.000 3.873 6.702 9.506 13.228 17.606 23.256 29.070 39.063
80 mm 2.111 4.072 7.013 10.000 13.889 18.248 24.510 30.303 40.000
90 mm 4.472 7.634 10.917 14.925 19.841 26.042 33.113 41.667
100 mm 4.873 8.251 11.820 16.340 21.459 27.778 35.714 46.296
110 mm 8.881 12.723 17.730 23.041 31.250 38.168 47.170
120 mm 9.506 13.624 18.797 24.631 32.895 40.984 50.000
130 mm 10.101 14.535 20.000 26.316 34.722 43.478 52.632
140 mm 10.707 15.432 20.833 27.933 35.461 46.296 55.556
150 mm 11.312 16.340 22.222 29.412 37.594 48.544 58.824
160 mm 11.905 17.241 24.272 31.056 40.984 50.505 61.728
170 mm 12.500 18.116 32.680 53.191 64.935
180 mm 13.123 19.011 26.882 34.247 55.556 67.568
190 mm 13.736 19.920 35.971 58.140 70.423
200 mm 14.327 20.833 29.586 37.594 49.020 60.976 73.529
220 mm 15.528 22.624 40.650 65.789 79.365
240 mm 16.722 24.510 43.860 71.429 84.746
250 mm 17.301 25.381 45.455 74.627 87.719
260 mm 17.921 26.316 47.170 76.923 90.909
280 mm 19.157 28.090 50.505 81.967 98.039
300 mm 20.325 29.940 53.763 87.719 104.167
320 mm 31.646 56.818 92.593
340 mm 33.557 60.241 98.039
360 mm 35.211 63.291 104.167
380 mm 37.037 66.667 108.696
400 mm 39.063 69.444 113.636

Dimensions Of ASTM A193 B7 Bolts

**All measurements in millimeters**
NOMINAL SIZE (D) BODY DIAMETER HEAD THICKNEASTM A193 ACROASTM A193 THE FLATS ACROASTM A193 CORNERS
D (MAX) D (MIN) H (MAX) H (MIN) F (MAX) F (MIN) C (MAX) C (MIN)
m10 10.00 9.78 6.63 6.17 17.00 15.73 18.48 17.77
m12 12.00 11.73 7.76 4.24 19.00 17.73 20.78 20.03
m14 14.00 13.73 9.09 8.51 22.00 20.67 24.25 23.35
m16 16.00 15.73 10.32 9.68 24.00 23.67 27.71 26.75
m20 20.00 19.67 12.88 12.12 30.00 29.16 34.64 32.95
m24 24.00 23.67 15.44 14.56 36.00 35.00 41.57 39.55
m30 30.00 29.67 19.48 17.92 46.00 45.00 53.12 50.85
m36 36.00 35.61 23.38 21.63 55.00 53.80 63.51 60.79
m42 42.00 41.38 26.97 25.03 65.00 62.90 75.06 71.71
m48 48.00 47.38 31.07 28.93 75.00 72.60 86.60 82.76
m56 56.00 55.26 36.2 33.80 85.00 82.20 98.15 93.71
m64 64.00 63.26 41.32 38.68 95.00 91.80 109.70 104.65
m72 72.00 71.26 46.45 43.55 105.00 101.40 121.24 115.60
m80 80.00 79.26 51.58 48.42 115.00 111.00 132.72 126.54
m90 90.00 89.13 57.74 54.26 130.00 125.50 150.11 143.07
m100 90.00 99.13 63.9 60.10 145.00 140.00 167.43 159.60

Ready Stock of ASTM A193 GR B7 Bolts

ASTM A193 Grade B7 Hex Bolts
ASTM A193 Grade B7 Heavy Hex Bolts
ASTM A193 Grade B7 Stud Bolts
ASTM A193 Grade B7 Full Thread Studs
ASTM A193 Grade B7 Double Ended Studs
ASTM A193 Grade B7 Tap End Studs
ASTM A193 Grade B7 Threaded Rods
ASTM A193 Grade B7 Custom Length Bolts
ASTM A193 B7 Eye Bolts
Alloy Steel ASTM A193 B7 Anchor Bolt
A193 B7 Anchor Bolts
Alloy Steel ASTM A193 Gr. B7 Bolts

ASTM A193 GR B7 Bolts Application Industries

Refineries
90%
Oil and Gas Industry
96%
Power Generation
80%
Pharmaceutical Equipment
85%
Pulp & Paper Industry
88%

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