Import Astm Studs & Bolts — Buy in wholesale FOB from Supplier in India

ASTM studs and bolts from Tiurakh Overseas are threaded fastening elements manufactured to ASTM A193 and A320 material specifications for high-strength service in pressure-retaining equipment. The product range spans alloy steel Grade B7 and B7M with corresponding A194 Grade 2H and 2HM nuts, B16 with Grade 4 nuts, and low-temperature Grade L7 and L7M with 2H/2HM nuts, plus A325 structural bolts with washers. Diameter coverage extends from 12 mm to 72 mm, accommodating load requirements from light piping to heavy pressure vessel flanges. Material options include alloy steel quenched and tempered to achieve specified mechanical properties, with alternative supply in stainless steel 304 or 316 for corrosive environments where A193/A320 grades are not mandated.

Manufacturing to ASTM A193 requires controlled heat treatment: austenitising, quenching in liquid medium, and tempering to achieve minimum tensile strength of 860 MPa for B7 up to 100 mm diameter, with 725 MPa yield strength and 18% elongation. B16 grade incorporates vanadium for enhanced creep resistance above 425°C. A320 L7 specifies Charpy V-notch impact testing at -100°F (-73°C) to verify toughness for cryogenic service. The chromium, molybdenum and vanadium proportions in alloy steel grades produce tempered martensite microstructure with specified hardness limits (B7: 321 HBW maximum, B7M: 235-321 HBW). Stainless steel variants rely on cold work and solution annealing rather than quench-and-temper, with lower strength but superior chloride stress corrosion cracking resistance.

These fasteners serve critical joints in oil and gas production equipment, petrochemical reactors, fossil and nuclear power generation, cryogenic storage systems and structural steel frameworks. End-users include engineering procurement contractors, maintenance organisations and original equipment manufacturers requiring full material certification. Tiurakh Overseas dispatches from Ludhiana, Punjab, a recognised Indian fastener manufacturing cluster with established metallurgical infrastructure. Buyers must confirm with the supplier whether mechanical testing, zinc plating, hot-dip galvanising or PTFE coating is available, as the listing does not specify surface finish or supplementary processing. Payment structures, MOQ and lead time are absent from the profile and require direct negotiation.

Tiurakh Overseas operates from Ludhiana, Punjab, India, a city with substantial concentration of fastener and engineering goods manufacturers serving domestic and export markets. The supplier's trust tier is classified as 'harbor', indicating an unverified or newly registered profile without established transaction history on the platform. Response metrics show 0.00% response rate with zero average response hours, signalling that prospective buyers should not expect prompt communication and should build contingency time into procurement schedules. No factory ownership, production capacity, ISO certification, or export registration details are provided in the available profile.

The listing identifies Tiurakh Overseas as offering ASTM A193, A320 and A325 fasteners with diameter range 12-72 mm and grade variety including B7, B7M, B16, L7, L7M. What remains unstated is significant: no manufacturing standard accreditation (PED, ASME, API), no mention of in-house heat treatment or subcontract arrangement, no quality management system certification, and no client reference list. The Ludhiana location suggests access to regional forging, machining and heat treatment subcontractors, but buyers must verify actual manufacturing source and capability. Given the absence of response history, initial contact should request factory profile, inspection protocol and sample provision before commercial negotiation.