At BS ENTERPRISES we have been quick to embrace the latest advances in drainage technology over the years. Pipe lining is one of those advancements which has proved invaluable, especially where ground excavation isn’t a feasible option.
We can provide a complete end to end pipeline cleaning and repair service to all our Customers both on the Highway and on private property. We can clean and repair all pipe materials and various sizes and stock an extensive range of cleaning fittings and pipework
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Unlike higher-strength bolts (e.g., ASTM A325 or A490), A307 bolts are not intended for structural connections subject to heavy dynamic or fatigue loading. Instead, they are ideal for light-duty fastening, flanged joints, cast iron connections, and general maintenance. The specification includes two primary grades, plus a third less common grade:
1. Overview ASTM A307 is a standard specification issued by ASTM International for carbon steel bolts, studs, and threaded rods with a minimum tensile strength of 60,000 psi (415 MPa). It is one of the most common, general-purpose fastener standards used in non-critical, low-stress applications, particularly in construction, plumbing, and machinery assembly. astm 307
| Grade | Description | Typical Use | |-------|-------------|--------------| | | Low carbon steel (no heat treat required). Soft, ductile, and easily bendable. | General purpose fasteners, pipe flanges, electrical conduits, anchor bolts. | | Grade B | Low carbon steel (may be heat treated). Slightly higher strength and hardness. | Flanged joints in piping systems (especially cast iron flanges), mild machinery assembly. | | Grade C | (Rarely used/obsolete) | Replaced by F1554 for anchor bolts. | Unlike higher-strength bolts (e
Grade A is fully threaded and more ductile; Grade B is often partially threaded and has tighter hardness restrictions. 3. Mechanical Properties (Grade A & B) | Property | Grade A | Grade B | |----------|---------|---------| | Tensile Strength | 60,000 psi (min) | 60,000–100,000 psi | | Yield Strength (approx.) | 36,000 psi (min) | No explicit requirement, but typically 36,000–55,000 psi | | Hardness (Rockwell) | B69–B100 | B69–B95 | | Elongation | 18% min (in 8 in.) | 18% min (in 8 in.) | Note: Grade B must pass a hardness test , while Grade A is usually accepted based on tensile and bend tests. 4. Chemical Composition (max values) | Element | Grade A & B | |---------|-------------| | Carbon (C) | 0.29% | | Manganese (Mn) | 1.20% | | Phosphorus (P) | 0.04% | | Sulfur (S) | 0.05% | Overview ASTM A307 is a standard specification issued
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