Inconel 601 (N06601): Fasteners & Raw Materials

What is Inconel 601 and its applications?

Inconel 601 (UNS N06601) is a nickel-chromium-iron alloy with an aluminum addition that improves oxidation resistance. It is used in thermal-processing equipment, chemical plant and power-generation hardware.

Industrial heating: Baskets, trays, radiant tubes and flame shields.
Chemical processing: Process heaters and catalyst grid supports.
Power generation: Superheater supports and ash-handling components.

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Engineering Application & Selection Guide

Chromium and aluminum support a protective oxide scale. This oxidation behavior is distinct from precipitation strengthening and does not establish an allowable stress or service temperature for a threaded joint.

Inconel 601 stud bolts — For catalyst supports, establish creep and relaxation requirements at the threaded section.
Inconel 601 hex bolts — For furnace fixtures, check thermal expansion and the final material condition.
Inconel 601 custom fasteners — For custom anchors, show the attachment details and anticipated thermal movement.

Compare 601 and 800H according to the gas atmosphere, thermal cycling and sustained-load requirements. Select material condition and joint geometry independently of a headline oxidation-temperature figure.

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Inconel 601 Composition

Composition limits · wt.%

ElementWeight %

Ni: 58–63%
Cr: 21–25%
Al: 1.0–1.7%
Fe: Balance
C: ≤0.10%
Mn: ≤1.0%
S: ≤0.015%
Si: ≤0.50%
Cu: ≤1.0%

ASTM / ASME specifications by product form

Finished-product requirements

Specify the finished-fastener mechanical requirements, condition and inspection separately from the starting-stock specification.

Inconel 601 hex bolt requirements ↗

Fasteners · dimensional references

Product	Reference
Hex bolts	ISO 4014 / ISO 4017 · ASME B18.2.1
Threaded studs	DIN 976-1 · ASME B18.31.2
Hex nuts	ISO 4032 · ASME B18.2.2
Socket head screws	ISO 4762 · ASME B18.3
Flat washers	ISO 7089 / ISO 7090 · ASME B18.21.1
Custom fasteners	Customer drawing

Raw-material specifications

Product form / scope	Reference
Rod, bar & wire	ASTM B166 / ASME SB166
Plate, sheet & strip	ASTM B168 / ASME SB168 · EN 10095
Seamless pipe & tube	ASTM B167 / B829 · ASME SB167 / SB829
Tube / pipe general requirements	ASTM B751 / B775 · ASME SB751 / SB775

Dimensions do not define material or finished-part compliance. Specify the grade, condition and applicable requirements.

How to specify round bar, plate, wire and strip ↗

Inconel 601 Mechanical Properties

Reference sample and condition

Data basis: Catalogue reference minimums
Gauge length: A5, as labelled in supplied table

Key properties	Value
Tensile strength	≥552 MPa
0.2% yield strength	≥205 MPa
Elongation	≥30%

Supplied technical reference · Scanned PDF page 4 · printed page 16

Procurement and application guide

Specify the material and final condition

Oxidation resistance does not define the allowable load.

Material forms in the technical reference: Round bar · Flat bar · Wire · Plate · Sheet · Strip · Pipe & tube · Forging stock · Hexagon & sections.

Define the finished-part acceptance

Include the material or bolting specification, required final condition, dimensions and quantity. State the service medium, temperature and loading where known. Agree the required tests, inspection coverage and acceptance criteria for the finished part.

Start with the information you have

Send a drawing or share the product form and dimensions. Identify any undecided requirements for review rather than copying a typical property value into the purchase order.

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