What material grade does Alloy 333 U Bolts use?

Alloy 333 U Bolts are manufactured per the applicable ASTM, ASME, DIN, or ISO specification for the material grade. TorqBolt provides material test certificates (MTC) per EN 10204 3.1 or 3.2 with every supply.

What sizes are available for Alloy 333 U Bolts?

TorqBolt manufactures Alloy 333 U Bolts in metric sizes M6 to M100 and imperial sizes 1/4" to 4" diameter, with custom lengths from 10mm to 3000mm. Non-standard sizes are available on request.

Are Alloy 333 U Bolts NACE MR0175 / ISO 15156 certified?

Yes, Alloy 333 U Bolts can be supplied with NACE MR0175 / ISO 15156-2/3 sour service certification when specified at order. Material certificates and test reports are provided.

What is the typical delivery time for Alloy 333 U Bolts?

Standard stock items ship in 1-2 weeks. Custom manufactured Alloy 333 U Bolts typically ship in 4-6 weeks depending on quantity, material availability, and certification requirements.

Do you provide third-party inspection for Alloy 333 U Bolts?

Yes, third-party inspection by TUV, Lloyd's Register, BV, DNV, SGS, and Intertek is available upon request for Alloy 333 U Bolts. Witness testing and stage inspections can be arranged.

Alloy 333 U Bolts

Name: Alloy 333 U Bolts
Brand: TorqBolt
SKU: TB-ALLOY333UBOLTS
Availability: InStock

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Alloy 333 U Bolts Specification

The raw material of these fasteners is further classified as Super Nickel Alloys. Being a PED certified Fasteners Manufacturer by TUV Rheinland,our fasteners are accompanied with EN 10204 3.1/3.2 certification. Alloy 333 U Bolts are available in hot forged,cold forged and bar stock machined conditions depending upon the order quantity.

Alloy 333 Equivalent Designation

UNS Designation	British STD	Werkstoff No.	European STD	Swedish STD	Japanese STD
–	–	–	–	–	–

Surface Treatments & Coatings

Electro Zinc Plating Hot Dip Galvanizing Ptfe Fluorocarbon Coating Aluminizing Ceramic Filled Fluorocarbon Coating Nickel Plating Mechanical Zinc Coating Electro Zinc Cobalt Plating Electro Zinc Nickel Plating Phosphate Coating Electro Less Nickel Plating Electro Cadmium Plating Dacromet 320 500 Coating Pickled Passivated Fasteners Silver Plating

Alloy 333 U Bolts — Specifications & Dimensions

Alloy 333 U bolts are externally threaded fasteners with an integral head, manufactured per ASME B18.2.1, ISO 4014/4017, and DIN 933/931. TorqBolt produces Alloy 333 U bolts in metric (M6–M100) and imperial (1/4"–4") diameters with custom lengths from 10 mm up to 3000 mm.

Head Styles Available

Hex head — ASME B18.2.1, the workhorse for general bolting
Heavy hex head — thicker head for high-load joints, ASTM A325 / A490 patterns
Socket head cap (SHCS) — ASME B18.3 / DIN 912, ideal where space is limited
Button head, flat head, countersunk — flush-mount applications
12-point flange — tool-engagement-critical assemblies

Thread & Shank

Alloy 333 U bolts are supplied with full or partial threading. Full-thread (UNC, UNF, ISO metric coarse/fine) for tension-only joints; partial-thread shank for shear loads where the unthreaded grip carries the load. Thread fits per ASME B1.1 (Class 2A) or ISO 965 (6g) by default; tighter Class 3A / 4h6h fits available on request. Engagement length follows the 1.5×D rule for tapped holes; 1.0×D minimum on through-bolting.

Mechanical Performance

Alloy 333 U bolts achieve characteristic tensile strength, yield, and elongation per the source-material spec, with proof-load testing and hardness verification per ASTM F606 / ISO 898-1. Torque-tension calibration is published per ASME PCC-1 for critical joints. Each lot ships with EN 10204 3.1 (or 3.2 on request) certificates listing chemistry, mechanicals, hardness, and dimensional inspection.

Custom Configurations

TorqBolt can produce Alloy 333 U bolts to drawing, with non-standard heads, drilled-shank variants, double-end, captive, or matched-set configurations. Coatings include zinc, PTFE, Xylan, hot-dip galvanized, and electroless nickel. NACE MR0175 / ISO 15156 sour-service certification on request.

High-Nickel Superalloys (Alloy 230, 330, 333, 602, W)

High-nickel superalloys beyond the Inconel + Hastelloy family include specialty grades engineered for unique service envelopes — ultra-high-temperature furnace components, oxidation-resistant structural alloys, and corrosion alloys where C-276 reaches its limits.

Alloy 230 (UNS N06230) is a Ni-Cr-W-Mo solid-solution alloy combining the high-temperature strength of Inconel 625 with superior oxidation resistance to 1150°C — the standard for gas-turbine combustor cans and reformer tubes. Alloy 330 (N08330) is a Fe-Ni-Cr alloy for cyclic-temperature furnace fixtures. Alloy 333 (N06333) extends the envelope with higher Mo+W. Alloy 602 CA (N06025) achieves the highest oxidation resistance of any wrought Ni-base alloy at 1200°C+ via Al + reactive-element additions. Alloy W (N10004) is a Ni-Mo-Fe-Cr alloy for sulfuric and reducing-acid service.

These specialty alloys ship per ASTM B435 / B574 / B575 with EN 10204 3.1 / 3.2 certification including chemistry, mechanicals at room + elevated test temperatures, hardness, and oxidation / corrosion testing per the application's requirement. Welding requires matched-composition filler with strict control of dilution.