ASTM A193 Grade B7 Bolts

ASTM A193 Grade B7 Bolts

astm-a193-grade-b7-bolts

ASTM A193 Grade B7 Bolts is a standard material specification for chromium-molybdenum alloy steel fasteners for use in high tensile, high temperature and special purpose applications. Grade B7 is a heat-treated chromium-molybdenum alloy steel with minimum tensile requirement of 100 ksi, yield of 75 ksi and maximum hardness of 35 HRC. ASTM A193 specification covers requirements for chemical composition, mechanical properties, hardness, heat-treatment, recommended nuts-washers for Grade B7 fasteners. ASTM A193 Grade B7 Bolts is the most widely fastener specifications, commonly found in bolting or piping, pressure vessels, valves, flanges and fittings.

ASTM A193 Grade B7 Bolts bolts and strung studs are made from a chromium-molybdenum steel and are extinguished and tempered to build up the ideal mechanical properties. Level B7 is the most widely recognized level of A193 jolts utilized in development. B7 strung studs and short, headed jolts are promptly accessible in the commercial center. Review B7 jolts are normally utilized in pipe spine associations. These jolts are ordinarily purchased and sold in a plain, uncovered metal completion however are regularly hot-plunge stirred, zinc plated, Xylan covered, PTFE covered, or generally covered for consumption opposition. Note that covered jolts will be unable to withstand the high temperatures that uncoated B7 jolts can be exposed to.

ASTM A193 Grade B7 Bolts is a standard specification for high tensile alloy steel bolting material for use in high temperature or high-pressure service and other special purpose applications. It covers material specification for bolting used in pressure vessel service, valves, flanges and fittings. ASTM A193 defines both SI and inch-pound units.

Rimco Overseas is a manufacturer and supplier of A193 Grade B7 fasteners in form of Stud Bolts (Studs), Hex Bolts, Socket Head Cap Screws, Threaded Rods, Heavy Hex Bolts, Hex Screws, Double End Studs, Eye Bolts, Galvanized Hex Bolts, Anchor Bolts, etc.

 

ASTM A193 B7 Bolts Specification

ASTM A193 B7 Bolt Type ASTM A193 B7 Anchor Bolt, Carriage Bolt, Flange Bolt, 12 Point Bolt, Hex and Hex Flange Bolts, Hex Head Cap Screw, Place Bolt, Socket Head Cap Screws, Hanger Bolt, Hexagon Bolt / Tap Bolt, Lag Bolt, Machine Bolt, Plow Bolt, Shoulder Bolt, Square Head Bolt, Stud Bolt, T-Head Bolt, Toggle Bolt, U-Bolt
Inch #0000 -3" (customized sizes available)
Metric M1.6 - M48
Length Customized Length
Grade Non Ferrous, 12.9, 10.9, 9.8, 8.8, 5.8, 4.6, B7, 2, 5, 8, L9
Material Brass, Bronze / Copper Base Alloy, Copper, Molybdenum, Steel, Hardened Steel, Stainless Steel, Superalloy (Inconel, 718 Bolts, Hastelloy, Monel), Titanium, Exotic Metals, Other
Method Cold forming, Hot Forging, Wire Forming
Fastener Standards ASME / ANSI, BS, DIN, ISO, JIS, SAE, Other
Application Industries & uses Agriculture, Automotive, Construction and Infrastructure, Energy, Transportation
Testing Methods ASTM E38, E76 and E354, ASTM E53, E54, E62, E75and E478, ASTM E34, E101 and E227, ASTM E 120 and E1409.
Threads Configuration ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads
Thread Diameters M6 to M36
Certification Dual Certified As per ASTM & ASME Codes

 

Chemical Properties

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%

 

Mechanical Composition

Grade Size Tensile ksi, min Yield, ksi, min Elong, %, min RA % min HBW HRC
B7 Up to 2-1/2 125 105 16 50 321 max 35 max
2-5/8 - 4 115 95 16 50
4-1/8 - 7 100 75 18 50

 

Raw Material Description

Grade Raw Material Description
B7 Chromium Molybdenum Alloy Steel, Quenched & Tempered

 

Mechanical Properties

Grade Diameter Tensile Strength Yield Strength Elongation Reduction Hardness
Grade B7 M64 and under 860 720 16 50 321 HBW or 35 HRC
Grade B7 Over M64 to M100 795 655 16 50 321 HBW or 35 HRC
Grade B7 Over M100 to M180 690 515 18 50 321 HBW or 35 HRC

 

ASTM Standards Of ASTM A193 B7 Bolts

ASTM A193 B7 Alloy steel, AISI 4140/4142 quenched and tempered
ASTM A193 B8 Class 1 Stainless steel, AISI 304, carbide solution treated.
ASTM A193 B8M Class 1 Stainless steel, AISI 316, carbide solution treated.
ASTM A193 B8 Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened
ASTM A193 B8M Class 2 Stainless steel, AISI 316, carbide solution treated, strain hardened

 

ASTM A193 B7 Bolts Characteristics

Grade Description Diameter Tensile Strength, min. Yield Strength, min. Hardness, max. Marking
ASTM A193 B7 Chromium-Molybdenum 2 1/2” and under 125 105 321 HB or 35 HRC B7
over 2 1/2” to 4” 115 95 321 HB or 35 HRC
over 4” to 7” 100 75 321 HB or 35 HRC
ASTM A193 B8 class 1 S30400 (304) all 75 30 223 HB or 96 HRB B8
ASTM A193 B7 B8 class 2 S30400 (304) 3/4” and under 125 100 321 HB or 35 HRC B8SH
over 3/4” to 1” 115 80 321 HB or 35 HRC
over 1” to 1 1/4” 105 65 321 HB or 35 HRC
over 1 1/4” to 1 1/2” 100 50 321 HB or 35 HRC
ASTM A193 B8M class 1 S31600 (316) all 75 30 223 HB or 96 HRB B8M
ASTM A193 B8M class 2 S31600 (316) 3/4” and under 110 95 321 HB or 35 HRC B8MSH
over 3/4” to 1” 100 80 321 HB or 35 HRC
over 1” to 1 1/4” 95 65 321 HB or 35 HRC
over 1 1/4” to 1 1/2” 90 50 321 HB or 35 HRC

 

Available ASTM A193 B7 Bolts Other Types

  • ASTM A193 B7 Bolts
  • ASTM A193 B7 Non Ferrous Bolts>
  • ASTM A193 B7M Hex Bolts Stockist
  • A193 B7 Hexagon Bolts
  • ASTM A193 B7 Square Bolts
  • ASTM A193 B7M Bolts Exporter
  • ASTM SA193 B7 Screws Dealer
  • A193 B7 Hex Cap Screws Exporter
  • ASTM A193 B7 Studs Supplier
  • ASTM A193 B7 Studs
  • ASTM A193 B7M Bolts Manufacturer
  • ASTM A193 B7M Threaded Rods Exporter
  • ASTM A193 B7 Heavy Hex Bolts Distributor
  • ASTM A193 B7 Bolts Stockholder
  • ASTM A193 B7 Hex Head Bolts Supplier
  • ASTM A193 B7 Hex Head Bolts Stockist
  • ASTM A193 B7M Screws
  • A193 B7 Hexagon Head Screw Manufacturer in India
  • ASTM A193 B7 Hexagon Head Cap Bolts
  • ASTM A193 B7 Socket Head Cap Screws Supplier

 

ASTM A193 B7 Bolts Industrial Applications

»  ASTM A193 B7 Bolts uses in Aircraft Exhaust Manifolds
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»  ASTM A193 B7 Bolts uses in Gas Processing
»  ASTM A193 B7 Bolts uses in Specialty Chemicals
»  ASTM A193 B7 Bolts uses in Pharmaceuticals
»  ASTM A193 B7 Bolts uses in Pharmaceutical Equipment
»  ASTM A193 B7 Bolts uses in Spiral Welded tube for burner pipes and flues
»  ASTM A193 B7 Bolts uses in Sea Water Equipment
»  ASTM A193 B7 Bolts uses in Heat Exchangers

 

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