Hastelloy C276 Plate

Q: Can Hastelloy C276 plates be heat-treated to increase hardness?

Não. C276 is an austenitic alloy that cannot be hardened by heat treatment.It can only be hardened and strengthened through cold working.Annealing at 2050°F (1121°C) followed by a rapid quench is used only to soften the material and restore maximum corrosion resistance after heavy processing.

UMA Hastelloy C276 plate is a flat-rolled semi-finished metal product made from a premium nickel-molybdenum-chromium superalloy.It is globally recognized as the industry standard for extreme corrosion resistance against both oxidizing and reducing chemical media. Because of its specialized chemical composition,it maintains its physical structural integrity where standard stainless steel would instantly degrade or fail.

Key Performance Strengths

Resistência universal à corrosão:
Survives both highly oxidizing environments (like ferric chloride) and highly reducing media (like sulfuric acid).
Pitting and Crevice Defense:
High molybdenum and tungsten content prevents localized pinhole punctures in stagnant,chloride-rich liquids.
Stress Corrosion Cracking Immunity:
The high nickel base makes the alloy virtually immune to catastrophic cracking under mechanical stress in hot chloride solutions.
Excellent As-Welded Performance:
Low carbon content prevents carbide precipitation during welding, meaning heat-affected zones retain full corrosion resistance without post-weld annealing.
High-Temperature Stability:
Retains mechanical strength,oxidation resistance, and structural integrity up to 1900°F (1038°C) in non-sulfur environments.

Applications of Hastelloy C276 Plate

We offer Hastelloy C276 plates and sheets in thicknesses of 0.5, 0.7, 1.0, 1.5, 2.0, 2.5, 3.0, 4.0, and 5.0.We offer not only placas de aço inoxidável e chapas, mas também placas feitas de Hastelloy, Incoloy, Inconel, Monel e outras ligas.Nossos produtos estão em conformidade com as normas ASTM A240, EN 10204, ISO 9001, PED 2014/68/UE, CE e outras. Com mais de uma década de experiência em fabricação e importação/exportação, somos o seu melhor atacadista na China.

Chemical Composition of Hastelloy C276 Plate

Ni	Mo	Cr	Fe	C	Co	Mn	V	C	Si	P	S
Equilíbrio	15.0 - 17.0	14.5 - 16.5	4.0 - 7.0	3.0 - 4.5	≤ 2,50	≤ 1,0	≤ 0,35	≤ 0,01	≤ 0.08	≤ 0.04	≤ 0.03

Can C276 Composition Change During Welding?

The base plate composition remains stable,but using the wrong filler metal can alter the weld pool chemistry.To match the plate’s performance,fabricators must use Alloy C276 filler wire (ERNiCrMo-4) to prevent elemental dilution at the joint.

What Role Does Tungsten Play in The Composition?

Tungsten works synergistically with molybdenum.It significantly amplifies the alloy’s resistance to localized pitting and crevice corrosion in severe chloride-bearing environments,such as stagnant seawater or bleach solutions.

Hastelloy C276 Standards & Equivalent Designations

Hastelloy C276 Alloy
Padrão / Sistema	Designação Equivalente
Número UNS	UNS N10276
DIN / Material alemão	W.Nr. 2.4819
PT Nome químico	NiMo16Cr15W
JIS	NW 0276
Generic Trade Name	Liga C276
Haynes Trademark	HASTELLOY® C-276

ASTM B575
ASME SB575
ASTM B906
ASME SB906

NACE MR0175
NACE MR0103
ISO 15156

EN 10204 Type 3.1
EN 10028-7
DIN 17750

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Mechanical Properties of Hastelloy C276 Plate

Propriedade	Value (Metric)	Value (Imperial)
Resistência à tracção	≥ 690 MPa	≥ 100 ksi
Força de rendimento	≥ 283 MPa	≥ 41 ksi
Alongamento	≥ 40%
Dureza	≤ 100 HRB

Note:Typical values often exceed these minimum standard limits,with actual tensile strength frequently reaching 790 MPa (115,000 psi).

Elastic and Shear Modulus

Modulus of Elasticity (Tension):205 GPa (29.8 × 10⁶ psi)
Modulus of Rigidity (Shear):79 GPa (11.4 × 10⁶ psi)
Poisson’s Ratio:0.307

Key Performance Impact

Alta ductilidade

The 40–60% typical elongation rating makes the heavy plate exceptionally ductile,allowing it to be severely cold-formed,bent,and rolled without fracturing.

Endurecimento do trabalho

It cannot be hardened via heat treatment.It gains structural strength exclusively through cold working,which will simultaneously elevate its hardness and yield strength.

Impact Strength

It retains exceptional fracture toughness and impact resistance even at cryogenic temperatures,preventing brittle structural failure in freezing environments.

Our Advantages in Hastelloy C276 Plate

100% Dual-Certified

We source our raw materials exclusively from world-class steel mills. Each sheet comes with a comprehensive EN 10204 3.1 factory test certificate.
It also complies with the ASTM B575/ASME SB575 and NACE MR0175/ISO 15156 safety standards for sour gas.

High-Precision Advanced Cutting

Cold cutting of materials up to 4 inches thick preserves the structural integrity of the alloy, eliminates the HAZ,and minimizes the risk of microcracks.We can process heavy-duty industrial plates quickly and cost-effectively while maintaining strict control over edge perpendicularity.

Extensive In-Stock Thickness Range

We maintain a stock of sheet metal in a variety of standard and oversized dimensions.Upon request,we can supply matching C276 alloy welding wire (ERNiCrMo-4) along with your sheet metal order,helping you avoid delays associated with external procurement.

Stringent Quality Control Protocol

Each steel plate undergoes handheld X-ray fluorescence testing prior to shipment to verify that its chemical composition meets the specified standards.Additionally,UT is performed in accordance with the ASTM A578 standard to ensure that the interior of the high-pressure vessel walls is completely sound.

FAQs About Hastelloy C276 Plate

Can Hastelloy C276 plates be heat-treated to increase hardness?

Não.C276 is an austenitic alloy that cannot be hardened by heat treatment.It can only be hardened and strengthened through cold working.Annealing at 2050°F (1121°C) followed by a rapid quench is used only to soften the material and restore maximum corrosion resistance after heavy processing.

Why is it safe to weld C276 plates without post-weld annealing?

Because the plate features an ultra-low carbon content.During the welding process,this low carbon limit prevents the formation of corrosive chromium-carbide precipitates along the grain boundaries.The HAZ remains completely stable and resistant to intergranular attack in the as-welded condition.

How can I verify that the plate is genuine Hastelloy C276?

Genuine products come with an MTC,which is a legal document detailing the specific furnace number,chemical composition,and mechanical property test results.Upon receipt of the goods,you can use a handheld XRF analyzer to analyze the material composition and immediately verify its metallurgical properties without damaging the steel plate.

Hastelloy C276 Plate