Incoloy 330 Round Bar
➡️ Alloy 330 | UNS N08330 | EN 1.4886 | X12NiCrSi35-16 | ASTM B511
➡️ ASTM, EN, JIS & International Standards
➡️ Supply Conditions
➡️ Multiple Diameters & Supply Lengths
➡️ Global Export & International Delivery
Country of Origin:
Europe, Japan, USA
Material Type:
Nickel Alloy
UNS Number:
N08330
Wr. No.:
1.4886
MTC Available:
EN 10204 3.1
Product Description for Incoloy 330 Round Bar
Incoloy 330 Round Bar is made from a nickel-iron-chromium heat-resistant alloy with silicon, UNS N08330. Bars are supplied to ASTM B511 and ASME SB511. The nearest European grade is 1.4886 (X10NiCrSi35-19).
The alloy contains about 34–37% nickel, 17–20% chromium and 0.75–1.50% silicon. It resists oxidation, carburisation and nitriding at high temperature, and has good resistance to thermal cycling.
The high nickel content keeps the structure stable and prevents sigma phase. Silicon improves oxidation and carburisation resistance.
Bars are supplied solution annealed and can be turned or ground. The alloy is non-magnetic.
Common applications include furnace parts, heat-treatment baskets and fixtures, radiant tubes, muffles, retorts, petrochemical parts and gas turbine parts. Alloy 330 is a workhorse heat-resistant alloy for the heat-treatment industry. Its stable austenitic structure means it does not become brittle through sigma phase, even after years of heating and cooling. It also resists the carburising and nitriding atmospheres used in case hardening and nitriding furnaces better than most stainless steels. For these reasons, it is widely used for baskets, trays, fixtures, retorts, muffles, radiant tubes and furnace rollers. It is sold under trade names such as RA330, and in Europe the matching grade is 1.4886 to EN 10095. It costs less than 800H or 600, which makes it a practical choice where creep strength is not the main limit. Bars are used for furnace rollers, hanger rods, fixture pins and burner parts. Cut pieces are supplied to fixture makers, and larger sizes are used for forged rings and bars that support hot loads.
Common Applications of Incoloy 330 Round Bar
➡️ Machined shafts, spindles, valve stems, pump sleeves and pins for food, beverage, dairy and pharmaceutical equipment, where the passive chromium oxide film resists both product acids and caustic clean-in-place chemicals.
➡️ Fasteners, studs, bolts, threaded rod and anchor components produced from bar stock, chosen for corrosion resistance combined with the ductility needed for cold heading and thread rolling.
➡️ Chemical, water treatment and general process plant parts such as agitator shafts, flange blanks, nozzles and support components handling water, steam and mildly corrosive media free of significant chlorides.
➡️ Architectural and structural hardware including handrail stanchions, balustrade fittings, tension rods and bollards, where a bright ground or polished bar finish provides both appearance and low maintenance.
International Equivalent Grade for Alloy 330 Round Bar
Standard
Country / Region
Grade
UNS
USA
UNS N08330
ASTM / AISI / SAE
USA
AISI 330, ASTM B511, SAE AMS 5716, RA330
EN 10095
Europe
EN 1.4886 (X12NiCrSi35-16 / X10NiCrSi35-19)
JIS
Japan
SUH330
GB
China
1Cr16Ni35
KS
South Korea
STS 330
Technical Specification for Incoloy 330 Round Bar
Specification
Value
Unit
Material
Nickel alloy
-
Grade
330 / UNS N08330
-
Standard
ASTM B511 / ASME SB511
-
Product Form
Round bar / rod
-
Diameter (supply range)
6–250
mm
Length (random)
1–6
m
Manufacturing Process
Hot rolled, forged, extruded or cold drawn
-
Surface Finish
Descaled, pickled, peeled, turned, ground or bright
-
Heat Treatment / Delivery Condition
Solution annealed
-
Tolerance Standard
ASTM B511 tolerance tables
-
Density
8.0
g/cm³
Melting Range
1400–1425
°C
Thermal Conductivity at 20°C
12.5
W/m·K
Coefficient of Thermal Expansion 20–100°C
14.4
µm/m·K
Specific Heat at 20°C
460
J/kg·K
Electrical Resistivity at 20°C
1.02
µΩ·m
Modulus of Elasticity at 20°C
196
GPa
Magnetic Properties
Non-magnetic
-
Testing / Inspection
Chemical analysis, tensile, hardness, dimensional, UT and PMI on request
-
Certification
EN 10204 3.1 mill test certificate (3.2 on request)
-
Technical Specifications
Get the key technical specifications for Incoloy 330 Round Bar
Alloy 330 Round Bar is supplied to ASTM B511, with ASME SB511 for pressure equipment.
Bars are solution annealed and rapidly cooled.
Physical data for Alloy 330 are reference values, useful for thermal expansion checks in fixtures.
Testing includes chemical analysis, tensile and dimensional checks, with UT and PMI on request.
ASTM B511 covers UNS N08330 bar, and ASME SB511 is used when the bar goes into pressure equipment. Solution annealing is done at about 1040–1150°C, followed by rapid cooling. In Europe, bar is often ordered as 1.4886 to EN 10095 for heat-resisting steels. For furnace parts, buyers often choose a bar size that allows for scaling loss over the part life, because the surface slowly oxidises in service. Welded fabrications such as baskets and fixtures should use matching 330 filler to keep uniform oxidation and thermal expansion across the joint. For pressure use, check the code allowable stresses at the service temperature, as they fall quickly above about 700°C.
Grain size is not an ASTM B511 requirement, but coarse-grained material can give better creep life in furnace parts that carry load.
Chemical Composition for Incoloy 330 Round Bar
Element
Symbol
Min
Max
Unit
Nickel
Ni
34.0
37.0
%
Chromium
Cr
17.0
20.0
%
Silicon
Si
0.75
1.50
%
Carbon
C
-
0.08
%
Manganese
Mn
-
2.00
%
Phosphorus
P
-
0.030
%
Sulfur
S
-
0.030
%
Copper
Cu
-
1.00
%
Lead
Pb
-
0.005
%
Tin
Sn
-
0.025
%
Iron
Fe
Balance
-
%
Chemical Composition
View the chemical composition and applicable material limits for Alloy 330 Round Bar
The table shows the ASTM B511 limits for UNS N08330.
Nickel at 34–37% gives a stable austenitic structure and resistance to carburisation and nitriding.
Chromium at 17–20% and silicon at 0.75–1.50% give oxidation resistance at high temperature.
Lead and tin are strictly limited because they harm hot workability and weldability. Nickel at 34–37% is what keeps Alloy 330 free from sigma phase, which is a common problem in heat-resistant steels with less nickel, such as 309 or 310, after long service at about 600–900°C. The high nickel also slows down carbon and nitrogen pick-up in carburising and nitriding furnace gases. Silicon at 0.75–1.50% forms a silica layer under the chromium oxide scale, which improves resistance to oxidation and carburisation. Chromium at 17–20% is moderate, so in very oxidising or sulfur-bearing gases, alloys with more chromium may last longer. Carbon is limited to 0.08% maximum. Lead and tin limits protect the alloy from hot cracking during forging and welding.
Manganese up to 2.00% and copper up to 1.00% are residual limits. Phosphorus and sulfur are held at 0.030% maximum each. Iron makes up the balance, about 40–45%.
Mechanical Properties for Incoloy 330 Round Bar
Mechanical Property
Value
Unit
Tensile Strength (ASTM B511, annealed)
≥ 483
MPa
Yield Strength 0.2% (ASTM B511)
≥ 207
MPa
Elongation (ASTM B511)
≥ 30
%
Mechanical Properties
Check the key mechanical properties and performance requirements of Alloy 330 Round Bar
The values shown are ASTM B511 minimum requirements for UNS N08330 in the solution annealed condition.
The alloy has moderate strength and high ductility. Its main value is heat resistance.
The Alloy 330 certificate should show the heat analysis, including silicon. ASTM B511 requires solution annealed Alloy 330 bar to reach tensile strength of at least 483 MPa, yield strength of at least 207 MPa and elongation of at least 30%. The alloy is not hardened by heat treatment, and its strength falls steadily as temperature rises. At furnace temperatures, the design limit is usually creep, oxidation or distortion under its own weight rather than room-temperature strength. For baskets and fixtures, the key property is resistance to warping and cracking during repeated heating and quenching, where Alloy 330 performs well because of its stable structure. Designers should use producer creep and rupture data for parts that carry heavy loads at temperature.
Room-temperature hardness is low, so fixtures can be bent and welded easily during fabrication. At about 870°C, strength is only a small fraction of the room-temperature value, so fixture designs should use generous sections and supports to avoid sagging.
Dimension / Sizes for Incoloy 330 Round Bar
Dimension / Size
Value
Unit
Available Diameter Range (supply capability)
6–250
mm
Standard Length (random)
1–6
m
Custom / Cut-to-Length
Available on request
-
Diameter Tolerance
Per ASTM B511 tolerance tables
-
Length Tolerance
Per ordered standard or as agreed (commonly +50 / -0 mm for cut lengths)
-
Straightness Tolerance
Per ASTM B511 or as agreed
-
End Condition
Saw cut square, chamfered or as ordered
-
Surface Finish
Hot finished, descaled, pickled, peeled, turned, centreless ground or cold drawn bright
-
Dimensions & Sizes
Explore available diameters, lengths, and dimensional requirements for Alloy 330 Round Bar
Pricing for Incoloy 330 Round Bar
Round Bar Prices are generally quoted per kilograms or meters tonnes and can fluctuate with the global raw material and market prices. The final price will depend on a variety of factors, including the grade size, diameter, length, surface finish, the quantity and whether the bars are cut to length or in standard lengths.
For smaller quantities, we can also quote per metre or per piece basis once the required dimensions have been confirmed. Container-loads or orders that are larger in size are typically priced per tonne, based upon the specifications required and the supply conditions.
Please provide your desired dimensions, grades, length number, and end for a current quote including the lead time applicable and details for certification.
Pricing
Get current Incoloy 330 Round Bar pricing based on size, quantity, grade, finish, and delivery requirements.
Why Choose Us
Euro Steel Bars is an international distributor, stockist and exporter of stainless round steel bars that cover carbon, stainless alloy, special grades. We stock a variety of sizes and grades. We guarantee every order with mill test certificates as well as full quality-assurance documentation. Our name speaks to our roots: European-sourced materials that is backed by the certificates and rigor that buyers from Asia as well as the Gulf and Africa are looking for.
Each bar we deliver is accompanied by EN 10204 3.1 mill test certificates as well as complete documentation of quality, so what you receive corresponds to what’s written in the documents. We carry a selection of sizes and grades ready for transport, and cut length upon the request of customers, which results in quicker lead times, whether you’re ordering just a one-off spec or a complete project tonnage.
We operate an actual wholesale business that is that is supported with an internationally-operated supply chain therefore we are able to serve fabricators sourcing one grade the same way in the same way as an EPC contractor who is placing a large order. Our clients include manufacturers, fabricators EPC construction companies, engineers oil and gas projects as well as construction companies. we design our inventory as well as documentation to show what buyers need to bring projects forward.
Our customers trust us across Qatar, Oman, Bahrain, Kuwait, Jordan, Malaysia, Singapore, Thailand, Taiwan, Turkey, Italy and South Africa. If you’re looking to source an Gulf energy project, or a construction project within Southeast Asia, you get the same quality of certified material, the exact documentation, and the exact delivery procedure.
Frequently Asked Questions
Should I choose Alloy 330 or 800H?
Why is Alloy 330 used for heat-treatment baskets and fixtures?
Is Alloy 330 the same as RA330 and 1.4886?
How does Alloy 330 compare with 310 stainless steel?
How is Alloy 330 welded and machined?
What are the limits of Alloy 330?
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