Nickel 31 Round Rod

Short Description:

Nickel 31 Round Rod is a high-performance nickel-based alloy rod, widely used in chemical processing, marine hardware, aerospace components, and precision industrial applications. It offers excellent corrosion resistance to oxidizing and reducing media, as well as superior mechanical performance. SASA ALLOY supplies Nickel 31 rods with customized diameter, length, surface finish, and tolerance. MTC (Mill Test Certificate), EN 10204 3.1 certificate, PMI inspection, and third-party…

Grade:: Nickel 31 / UNS N08331 / Alloy 31
Standard:: ASTM B473, ASTM B668
Surface:: Black, bright, peeled, polished, or ground
Diameter:: 3–800 mm (custom sizes available)

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Product Detail

Product Tags

SASA ALLOY supplies Nickel 31 rods with customized diameter, length, surface finish, and tolerance. MTC (Mill Test Certificate), EN 10204 3.1 certificate, PMI inspection, and third-party inspection are available to meet project and quality requirements.

Product Parameters

Item	Details
Product Name	Nickel 31 Round Rod / UNS N08331 Bar / Alloy 31
Grade	Nickel 31 / UNS N08331 / Alloy 31
Material Type	Nickel-Cr-Mo corrosion resistant alloy
Shape & Sizes	Round bar; diameter 6–300mm, length 1000–6000mm, customized available
Surface Finish	Black, bright, peeled, turned, polished, ground
Standards	ASTM B473, ASTM B668, ISO 9724, EN 10272
Tolerance	Standard h9, h11, k12 or customer-defined
Certificate	MTC, EN 10204 3.1, PMI report, third-party inspection

Chemical Composition

Element	Content (%)	Function
C	0.02 max	Reduces intergranular corrosion
Si	0.70 max	Improves corrosion resistance & weldability
Mn	2.00 max	Alloy stabilization
P	0.03 max	Controlled impurity
Cr	26–28	Oxidation & pitting resistance
Mo	30–32	Crevice & chloride corrosion resistance
Ni	19–21	Corrosion resistance and structure stability
N	0.11 max	Strength & corrosion support

Mechanical Properties

Property	Value	Notes
Tensile Strength	Approx. 500–750 MPa	For structural and machined parts
Yield Strength	≥ 220 MPa	Support service stability
Elongation	≥ 35%	Ductility for forming & machining
Density	Approx. 8.0 g/cm³	Weight calculation & logistics reference
Hardness	Condition dependent	Check per project requirement

Common Size Table

Diameter	Length	Surface	Application
6–20mm	1000–3000mm	Bright, polished, ground	Precision pins, shafts, instrument parts
22–50mm	2000–6000mm	Peeled, turned	Fasteners, valve stems, pump shafts
55–100mm	3000–6000mm	Black, peeled, rough	Chemical equipment, marine hardware
110–200mm	Cut-to-length	Black, forged	Pressure equipment, large parts
200+mm	Customized	Forged, rough turned	Project-specific large components

Different Specifications Comparison

Form	Feature	Application	Advice
Round Bar	General corrosion & machining balance	Pumps, valves, fasteners	Standard machining
Forged Bar	Internal structure & large size	Heavy-duty equipment	Critical load components
Bright Bar	Surface finish & tolerance	Precision & medical parts	Tight tolerance machining
Ground Bar	Smooth surface & improved tolerance	CNC & precision shafts	Limited machining allowance

Equivalent Standards and International Names

Name	Designation	Notes
Common Trade Name	Nickel 31 / Alloy 31	International procurement reference
UNS Number	UNS N08331	Nickel alloy standard
European	W.Nr. 1.4565 / X1NiCrMoCu31-28-4	European standard
ISO Designation	4565-083-31-I	International reference
Bar Standard	ASTM B473 / B668 / ISO 9724	Reference for rods & bars

Production Process Flow

Step	Process	Quality Focus
1	Raw Material Selection	Grade, heat number, traceability
2	Melting / Refining	Control Ni, Cr, Mo, Cu
3	Hot Rolling / Forging	Bar size & internal quality
4	Solution Annealing	Corrosion resistance & structure
5	Straightening	Straightness for machining
6	Peeling / Turning / Grinding	Surface & tolerance
7	Cut-to-Length	Project length requirements
8	Inspection & Testing	PMI, dimension, surface, mechanical, UT
9	Packaging	Wooden crate, label, heat number

Product Inspection

Item	Method	Purpose
Chemical Composition	Spectrometer / Lab	Confirm grade & alloy elements
PMI Test	Positive Material ID	Prevent mix-up
Mechanical Test	Tensile, Yield, Elongation, Hardness	Verify engineering performance
Dimension	Caliper, Micrometer	Confirm diameter, length, tolerance
Surface	Visual inspection	Check cracks, scratches, peeling, finish
Ultrasonic	UT if required	Detect internal defects
Third-Party	SGS, BV, TUV	Independent verification
Certificate	MTC / EN 10204 3.1	Traceability & documentation

Product Packaging

Item	Details	Benefit
Surface Protection	Plastic film, anti-rust paper, protective wrap	Protects surface during transport
Bundle Packing	Bars tied with steel strips	Prevent movement & collision
Wooden Case / Pallet	Export-standard crate/pallet	Safe long-distance shipment
Labeling	Grade, size, heat number, quantity	Traceability
Documents	Packing list, Invoice, MTC, EN 10204 3.1, Inspection Report	Customs & project acceptance

Nickel 31 Round Rod empty wooden export crate for bar shipment

Nickel 31 Round Rod bars prepared for wooden case packing

Nickel 31 Round Rod stacked wooden cases for overseas shipment

Applications & Machinability

Applications

Industry	Typical Parts	Why Nickel 31 Bar
Medical Instruments	Precision instruments, lab fixtures, corrosive cleaning equipment	High corrosion resistance & stable surface
Aerospace	Fasteners, precision components, structural parts	Reliable strength & oxidation resistance
Marine Hardware	Shafts, bolts, pumps, valves	Resistant to chloride pitting & SCC
Chemical Processing	Heat exchangers, pumps, valves, acid tanks	Resistance to sulfuric & phosphoric acid

Machinability, Welding & Heat Treatment

Property	Performance	Recommendation
Machinability	Moderate; not free-cutting	Use rigid tools, carbide, proper coolant
Welding	Good with correct filler & procedure	Clean surface & control heat input
Heat Treatment	Solution annealed; no precipitation hardening	Follow project spec & MTC
Cold Working	Possible but work hardens	Intermediate annealing for heavy forming

Why Choose SASA ALLOY?

Advantage	Description
Professional Alloy Supply	Nickel 31, Alloy 20/28/31, Hastelloy, Inconel, Incoloy, Monel bars, pipes, plates, flanges for chemical, marine, aerospace & oil & gas
Customized Size	Diameter, length, surface finish, tolerance, cut-to-length service
Quality Control	Material traceability, PMI, dimensional, surface, mechanical & 3rd-party inspections
Certificate Support	MTC, EN 10204 3.1, PMI, UT & inspection documents
Export Packaging	Wooden pallets, crates, protective wrap & labeling for global shipping
Industrial Service	Grade selection, equivalent standards, technical documents & project support

FAQ

Q1: What is Nickel 31 Round Rod?

Nickel 31 Round Rod is a high-performance nickel-based corrosion resistant alloy rod for chemical, marine, aerospace and precision industrial applications.