Neelkamal Alloys LLP is a leading manufacturer, stockist, and global exporter of high-grade industrial fasteners based in Mumbai, India. Engineering procurement teams across 105+ countries rely on our certified fastener materials when conventional carbon steel fails under extreme pressure, aggressive corrosion, or high-temperature environments.
Explore our wide selection of raw materials manufactured to ASTM, ASME, DIN, ISO, and EN standards for critical industrial applications.
Available Grades: SS 304, 304L, 316, 316L, 310S, 317L, 321, 347, 904L
Standard Specs: ASTM A193 B8 / B8M, ASTM A194 Gr 8 / 8M, ASTM A320
Delivering exceptional pitting resistance, atmospheric durability, and versatile mechanical strength for food processing, chemical plants, marine, and general industrial assemblies.
Available Grades: Duplex 2205 (UNS S31803 / S32205), Super Duplex 2507 (UNS S32750), UNS S32760
Standard Specs: ASTM A276, ASTM A479, ASTM A182 F51 / F53 / F55
Combines high yield strength with superior resistance to chloride stress corrosion cracking, making it ideal for offshore oil platforms, subsea pipelines, and desalination plants.
Available Grades: Nickel 200 (UNS N02200), Nickel 201 (UNS N02201), Alloy 800/800H/800HT
Standard Specs: ASTM B160, ASTM B408, ASTM B564
Provides outstanding thermal stability, electrical conductivity, and immunity to caustic alkalis and reducing chemicals in synthetic fiber and chemical processing equipment.
Available Grades: Monel 400 (UNS N04400), Monel K-500 (UNS N05500)
Standard Specs: ASTM B164, ASTM B865
High-strength nickel-copper alloy fasteners featuring rapid non-magnetic response and immunity to hydrofluoric acid, flowing seawater, and harsh marine environments.
Available Grades: Inconel 600, Inconel 601, Inconel 625, Inconel 718 (UNS N07718)
Standard Specs: ASTM B166, ASTM B446, ASTM B637
Engineered for extreme high-temperature and cryogenic service environments (up to 1000°C), resisting severe oxidation, carburization, and thermal stress in gas turbines and aerospace applications.
Available Grades: Hastelloy C276 (UNS N10276), Hastelloy C22 (UNS N06022), Hastelloy B2/B3
Standard Specs: ASTM B574, ASTM B575
The preferred material choice for highly aggressive chemical environments, offering protection against wet chlorine gas, hypochlorites, strong acids, and flue gas desulfurization systems.
Available Grades: Alloy 20 (UNS N08020 / Carpenter 20)
Standard Specs: ASTM B473, ASTM B462
Specifically developed to resist sulfuric acid corrosion across elevated temperatures and concentrations in acid pickling tanks, fertilizer manufacturing, and pharmaceutical synthesis.
Available Grades: Titanium Grade 2 (UNS R50400), Titanium Grade 5 (Ti-6Al-4V / UNS R56400)
Standard Specs: ASTM B348, ASTM F467, ASTM F468
Ultra-lightweight metal fasteners featuring exceptional strength-to-weight ratios and immunity to seawater and chlorine solutions for aerospace, defense, and marine engineering.
Coating Types: Blue PTFE, Fluoropolymer, Xylan 1424, Cadmium & Zinc Nickel Plating
Standard Specs: ASTM A193 B7/B8, ASTM A194 2H/8M
Features low friction coefficient coatings designed to prevent galling, lower breakout torque, and protect offshore flange bolting from severe atmospheric corrosion.
Review standard designations, chemical classifications, and target operating environments for procurement decision-making.
| Material Category | Popular Grades & UNS Numbers | Key ASTM / ASME Specifications | Operating Temperature & Application Environment |
|---|---|---|---|
| Stainless Steel | 304/304L, 316/316L, 321, 347, 904L | ASTM A193 (B8, B8M), A194 (8, 8M), A320 | -196°C to +400°C; General chemical processing, food, water & marine hardware |
| Duplex & Super Duplex | Duplex 2205 (S31803), Super Duplex 2507 (S32750), S32760 | ASTM A276, A479, A182 (F51, F53, F55) | -50°C to +300°C; Offshore platforms, seawater desalination & subsea pipelines |
| Inconel Alloys | Inconel 600, 601, 625, 718 (N07718) | ASTM B166, B446, B637 | Up to 1000°C; High-temperature gas turbines, heat exchangers & nuclear reactors |
| Hastelloy Alloys | Hastelloy C276 (N10276), C22 (N06022), B2 | ASTM B574, B575 | Severe chemical synthesis, wet chlorine gas & acid desulfurization scrubbers |
| Monel Alloys | Monel 400 (N04400), Monel K-500 (N05500) | ASTM B164, B865 | Marine propeller shafts, hydrofluoric acid handling & salt production |
| Titanium Metal | Grade 2 (R50400), Grade 5 (Ti-6Al-4V) | ASTM B348, F467, F468 | Weight-critical aerospace assemblies, defense & aggressive brine pumps |
| Alloy 20 | UNS N08020 (Carpenter 20) | ASTM B473, B462 | Concentrated sulfuric acid handling, pickling tanks & fertilizer plants |
Every shipment from Neelkamal Alloys LLP is thoroughly tested to guarantee compliance with international engineering specifications and buyer quality plans.
Raw round bars are verified using Positive Material Identification (PMI) analyzer guns to confirm exact chemical alloy composition prior to machining.
Dimensional compliance checked using calibrated thread ring and plug gauges to ASME B18.2.1, ASME B18.2.2, DIN 931, DIN 934, and ISO standards.
Full material test certificates (MTC) supplied with every dispatch, providing heat number traceability, mechanical yield, tensile, and hardness reports.
Support for client-nominated independent inspection agencies including TUV, SGS, Bureau Veritas, DNV, and Lloyds Register prior to seaworthy export packaging.
Share your material grade specifications, dimensions, and quantity requirements with our technical sales engineers for quick responses and competitive export quotes.
