CNC Machining Hastelloy: Cutting Tool Materials, Coolant Strategy, and Cost Optimization

Hastelloy is not one alloy - it is a family of nickel-chromium-molybdenum-based superalloys developed by Haynes International, renowned for resisting some of the most aggressive corrosion environments on earth. The most widely machined grade is Hastelloy C-276 (UNS N10276), whose nominal composition is Ni~57%, Mo 15–17%, Cr 14.5–16.5%, W 3–4.5%, Fe 4–7%, with carbon ≤0.01% and silicon ≤0.08%. This composition - high in work-hardening elements - is precisely why it is so hard to machine, and why standard stainless steel parameters will fail your tool quickly.

CNC Machining Hastelloy

This article is organized to answer three questions that CNC shops and procurement engineers ask most often:

Which cutting tool material and geometry actually works on Hastelloy C-276?
What coolant strategy prevents rapid tool wear and achieves acceptable surface integrity?
How do you optimize the total cost of machining - not just tool cost, but cycle time and setup cost?

[Source] Dudley, B. (ed.), "Hastelloy C-276 Alloy Technical Data," Haynes International; Machining Handbook, ASM International, Vol. 16.

When a cutting edge first contacts Hastelloy, the material deforms plastically beneath the tool tip. Because nickel alloys have low thermal conductivity (approximately 11–12 W/m·K at room temperature, roughly 1/3 that of steel), the heat generated at the shear zone cannot escape quickly. This heat, combined with the heavy mechanical load, drives rapid strain hardening. The result is a thin, extremely hard layer - sometimes reaching 350–400 HB locally - that the chip has already "pre-hardened" before the tool edge passes through it.

Three material properties combine to make Hastelloy C-276 one of the most difficult-to-machine commercial alloys:

Work-hardening rate: Reaches ~80% of final hardness within 10–15% of total deformation
Low thermal conductivity: Heat stays concentrated at the cutting edge rather than dissipating into the chip or workpiece
High strength at elevated temperature: Retains ~70–80% of room-temperature yield strength at 600°C, limiting the softening benefit of high-speed cutting

Hastelloy C-276 machines at approximately 30–50% of the speed of 316L stainless steel and generates 2–3× more heat at the tool-chip interface, making it comparable to machining Inconel 718 in difficulty but with higher molybdenum and tungsten content that accelerates abrasive wear.

Alloy	UTS (MPa)	Hardness (HB)	Machinability Index (vs AISI 1117=100)	Key Challenge
AISI 1117 Carbon Steel	430–510	126–150	100 (baseline)	Standard - no special issues
316L Stainless Steel	485–560	160–200	55–65	Moderate work-hardening
Alloy 825 (N08825)	530–690	180–220	45–55	Work-hardening, high Cr/Ni
Alloy 625 (N06625)	690–830	200–240	30–40	High strength, Ni-Cr-Mo
Inconel 718 (N07718)	965–1275	240–330	15–25	Very high strength, γ' precipitates
Hastelloy C-276 (N10276)	690–850	200–250	15–22	Work-hardening + low conductivity
Hastelloy C-22 (N06022)	690–800	200–240	15–20	Similar to C-276; slightly easier

For turning and milling Hastelloy C-276, the recommended tool hierarchy is: CVD-coated carbide (Al₂O₃/TiCN/Al₂O₃ multi-layer) ≥ PVD AlTiN-coated carbide > Cermet > SiAlN ceramic > CBN (for finishing only). Uncoated carbide is not recommended for production runs.

Cutting Tool Materials What Actually Works

Each tool material offers a different trade-off between hot hardness, chemical stability, and fracture toughness. The choice depends on the operation (roughing vs. finishing), the specific Hastelloy grade, and whether the shop is prioritizing tool life, surface finish, or cost.

Tool Material	Grade / Coating	Hardness (HV)	Max Service Temp (°C)	Tool Life Rating	Best Application	Relative Cost
Uncoated Carbide	K10/K20 (fine grain)	1,600–1,750	600	⭐ Very Poor	Laboratory only	1× (base)
PVD AlTiN-coated Carbide	PVD AlTiN / AlCrN	2,000–2,400	800–900	⭐⭐⭐ Good	General turning & milling	1.5–2×
CVD Al₂O₃/TiCN Multilayer	CVD Al₂O₃+TiCN+TiN	2,200–2,600	1,000+	⭐⭐⭐⭐ Excellent	Production turning; roughing	2–3×
Cermet (TiCN-based)	TiCN + Mo/Ni binder	1,800–2,200	800	⭐⭐⭐ Good	Finishing; low feed rates	2–2.5×
SiAlN Ceramic	Si₃N₄ + Al₂O₃ (Sialon)	2,400–2,800	1,200+	⭐⭐⭐⭐ Excellent	Rough milling; high speed	4–6×
CBN (Cubic Boron Nitride)	CBN ≥ 50% content	4,500–5,000	1,000	⭐⭐⭐⭐⭐ Superior	Finishing (< Ra 0.8)	8–15×
PCD (Polycrystalline Diamond)	PCD (≥98% diamond)	8,000–9,000	600–700	⭐⭐⭐⭐⭐ Superior	Graphite/SiC composite	10–20×

Why CVD-coated Carbide is the Industry Default for Production

CVD multi-layer coated carbide (Al₂O₃/TiCN/TiN on K-class substrate) is the most cost-effective choice for production CNC machining of Hastelloy C-276 because the outer Al₂O₃ layer provides excellent chemical stability at high temperature, while the TiCN sublayer adds fracture toughness, and the TiN top layer resists built-up edge formation.

The Al₂O₃ coating is thermodynamically stable in the presence of nickel - it does not react with the workpiece material at typical cutting temperatures (600–900°C). This is critical: tool wear in nickel alloy machining is predominantly chemical in nature, not just mechanical abrasion. The TiCN intermediate layer provides the substrate with resistance to thermal cracking under interrupted cuts (milling).

[Source] Abele, E. et al., "Coated Tools for Dry Machining of Nickel-based Alloys," CIRP Annals – Manufacturing Technology, 2015.

For the substrate, use a fine-grain carbide (grain size ≤ 1 μm) with cobalt content of 6–10%. The lower cobalt content (6%) gives higher hardness and wear resistance; 10% cobalt gives better toughness for interrupted cuts. Choose based on operation type:

Toughness-focused (interrupted cuts, deep pocketing): 8–10% Co, K-class (KC9140 equivalent)

Hardness-focused (continuous turning, thin walls): 6% Co, fine-grain (KC5010 equivalent)

PVD AlTiN: When and Why to Use It

PVD AlTiN-coated carbide is preferred over CVD for thin-wall parts, small-diameter tools (end mills < Ø12 mm), and machining where workpiece rigidity is limited, because PVD coatings produce a thinner, tougher coating without the tensile residual stresses that can cause edge chipping on fine tools.

PVD AlTiN coatings (deposited at 400–500°C, far below CVD's 900–1,000°C) maintain the substrate's original toughness. The AlTiN coating forms a dense Al₂O₃+TiN layered structure during cutting, providing oxidation resistance up to approximately 900°C at the tool rake face.

A specific recommendation: For Hastelloy C-276 turning at cutting speeds of 30–60 m/min, use a PVD AlTiN insert with a sharp cutting edge (hone radius 0.02–0.03 mm for finishing, 0.03–0.05 mm for roughing). A heavier hone (T-land) is NOT recommended - it pushes material rather than cutting it, dramatically increasing work-hardening.

Ceramic and CBN: When the Job Justifies the Cost

SiAlN ceramic inserts are recommended for high-speed rough milling of Hastelloy C-276 (cutting speeds 150–300 m/min) where cycle time is critical and tool inventory cost can be justified by 5–8× longer tool life compared to carbide. CBN is reserved exclusively for finishing operations where Ra < 0.8 μm is required.

Ceramic tools should be considered a process decision, not just a tool selection: they require rigid setups (no slender overhangs > 4× diameter), stable machine spindles (> 15,000 rpm for small inserts), and flood coolant to prevent thermal shock cracking. SiAlN is preferred over Al₂O₃ for nickel alloys because its thermal expansion coefficient (α ≈ 5.5 × 10⁻⁶/°C) is closer to steel, reducing thermal gradient stress at the cutting edge during coolant application.

[Source] Ezugwu, E.O. & Bonney, J., "Effect of High-Pressure Coolant on Tool Life when Turning Ni-based Inconel 718," ASME Journal of Manufacturing Science and Engineering, 2004.

CBN (Cubic Boron Nitride) has the highest hot hardness of any commercial tool material but is rarely used for roughing Hastelloy because it is brittle under the high mechanical impact of interrupted cuts. Its application is limited to:

Finish turning of bored holes and internal diameters where surface finish is critical
Continuous cut finishing of valve seats and pump components (Ra ≤ 0.4 μm)
High-speed threading of Hastelloy where carbide cannot maintain geometry

Insert Geometry and Edge Preparation

For Hastelloy C-276, the recommended insert geometries are: wiper geometry for finishing (large rake angle, extended land), standard negative rake (CNMG / CNGA) for general turning, and ball-nose or corner-radius end mills for 3D profiling. The cutting edge must always be sharp - a dull edge instantly triggers excessive work-hardening and rapid crater wear.

Operation	Insert ISO Code	Geometry	Hone Radius (mm)	Rake Angle	Application
Rough Turning	CNMG 120408 / CNMG 160612	Negative rake, strong edge	0.03–0.05	-6° to -8°	Heavy stock removal, OD turning
Finish Turning	DNMG 150604 / VNMG 160404	Wiper / positive rake	0.02–0.03	+5° to +12°	Surface finish Ra ≤ 1.6 μm
Interrupted Cut / Profiling	CNMG / SNMG	T-land reinforced	0.04–0.06	-6° to -10°	Grooves, slots, shoulders
End Milling (Rough)	APKT 1604 / SEKT 1204	Strong corner radius	0.03–0.05	-8° to -12°	Side milling, pocketing
End Milling (Finish)	Ball-nose Ø6–Ø20	Sharp cutting edge	0.015–0.02	+10° to +15°	3D profiling, die cavities
Threading	16ER / 22ER (ISO metric)	Sharp precision edge	0.01–0.02	0° to +5°	External threads, API rounds

For CNC turning of Hastelloy C-276, use cutting speeds of 30–60 m/min (carbide) or 80–150 m/min (SiAlN ceramic), feed rates of 0.1–0.25 mm/rev for roughing and 0.05–0.12 mm/rev for finishing, and depth of cut of 1.5–4.0 mm (roughing) or 0.25–1.0 mm (finishing). Never let the tool dwell - continuous cutting is essential.

Operation	Tool Material	Cutting Speed (Vc)	Feed Rate (fn)	Depth of Cut (ap)	Coolant	Expected Tool Life	Typical Ra Finish
Rough Turning	CVD Al₂O₃ Carbide	30–50 m/min	0.18–0.25 mm/rev	2.0–4.0 mm	Flood, high-pressure	15–30 min cutting time	Ra 3.2–6.3 μm
Semi-Finish	PVD AlTiN Carbide	40–65 m/min	0.10–0.18 mm/rev	0.75–2.0 mm	Flood, 10–15 bar	20–45 min cutting time	Ra 1.6–3.2 μm
Finish Turning	PVD AlTiN / Cermet	50–80 m/min	0.05–0.12 mm/rev	0.25–0.75 mm	Flood, clean	30–60 min cutting time	Ra 0.8–1.6 μm
Rough Boring	CVD Carbide	25–40 m/min	0.08–0.15 mm/rev	0.5–1.5 mm	Flood, through-tool	15–25 min cutting time	Ra 1.6–3.2 μm
Finish Boring	CBN or PVD AlTiN	35–70 m/min	0.04–0.08 mm/rev	0.1–0.5 mm	Flood, low pressure	30–90 min cutting time	Ra ≤ 0.8 μm
Threading (External)	PVD AlTiN / UN-coat	20–35 m/min (effective)	by pitch	0.05–0.10 mm/pass	Flood	5–15 passes/edge	Ra 1.6–3.2 μm
Parting / Grooving	PVD AlTiN narrow	20–30 m/min	0.03–0.06 mm/rev	Blade width 2–4 mm	Flood, high-pressure	10–20 min cutting time	Ra 3.2–6.3 μm

Recommended Parameters for Milling Hastelloy C276

For CNC milling of Hastelloy C-276, use cutting speeds of 35–60 m/min (carbide end mill) or 120–250 m/min (SiAlN ceramic ball-nose), axial depth of cut (ae) of 0.3–1.5× tool diameter, radial engagement (ap) of 0.5–3.0 mm, and feed per tooth (fz) of 0.03–0.08 mm/tooth. Full slotting should be avoided - use climb milling with radial engagement ≤ 50% of cutter diameter.

Operation	Tool	Tool Material	Cutting Speed (Vc)	Feed per Tooth (fz)	Ae (Radial DOC)	Ap (Axial DOC)	Coolant	Notes
Rough Pocket Milling	Ø12–Ø20 End Mill	PVD AlTiN Carbide	35–50 m/min	0.05–0.08 mm/z	1.5–3.0 mm	Up to 20 mm	Flood 10–15 bar	Slotting not recommended
Rough Side Milling	Ø16–Ø25 End Mill	CVD Al₂O₃ Carbide	40–60 m/min	0.06–0.10 mm/z	3–10 mm	5–20 mm	Flood high pressure	Climb milling preferred
Semi-Finish 3D	Ball-nose Ø10–Ø20	PVD AlTiN Carbide	45–70 m/min	0.04–0.08 mm/z	0.5–2.0 mm	3–10 mm	Flood	Constant engagement
Finish 3D Profiling	Ball-nose Ø6–Ø12	PVD AlTiN / CBN	50–90 m/min	0.02–0.05 mm/z	0.2–0.8 mm	1–4 mm	Flood low pressure	CBN for Ra ≤ 0.8 μm
High-Speed Roughing	Ø20–Ø50 Face Mill	SiAlN Ceramic	120–200 m/min	0.06–0.12 mm/z	2–6 mm	5–15 mm	Flood + air blast	Requires rigid setup
Profile Milling	Ø6 End Mill	PVD AlTiN Carbide	30–45 m/min	0.03–0.06 mm/z	0.5–2.0 mm	2–8 mm	Flood	Small tools: lower speed

The dominant wear mechanism changes with cutting speed:

Vc < 40 m/min: Primarily abrasive wear and edge chipping from hard secondary carbides in Hastelloy
Vc = 40–60 m/min: Balanced abrasive + chemical wear - optimal carbide window
Vc > 80 m/min: Thermal cracking perpendicular to cutting edge + rapid diffusion wear
Vc > 150 m/min (ceramic): Thermomechanical fatigue - need SiAlN specifically, not Al₂O₃

The practical implication: shops that try to "run fast" on Hastelloy are actually spending more money because they replace inserts every 5–10 minutes.

The cost-optimal approach is conservative speed (40–55 m/min) with maximum stable feed rate, using flood coolant to enable continuous cutting without thermal damage.

Dry machining of Hastelloy C-276 is not viable in production environments - tool life drops by 60–80% compared to flood cooling, and surface integrity (residual stress, white layer formation) degrades significantly. The minimum acceptable strategy is high-pressure flood cooling at 10–15 bar with flow rates ≥ 10 L/min through a 2–3 mm nozzle opening directed at the tool-chip interface.

The cooling function in nickel alloy machining is not just about temperature - it is about preventing the diffusion of workpiece atoms into the tool coating. At the extreme pressures and temperatures of the tool-chip interface, nickel and cobalt from Hastelloy can diffuse into the carbide substrate, forming intermetallic compounds that accelerate crater wear. A continuous coolant stream flushes this reaction zone and prevents this diffusion.

[Source] Sharman, A.R.C. et al., "The Effects of Cryogenic Cooling on Tool Life in End Milling of Hastelloy C-276," International Journal of Machine Tools & Manufacture, 2018.

Coolant Type: Semi-Synthetic vs. Neat Oil vs. MQL

For Hastelloy C-276 CNC machining, a 5–8% semi-synthetic (soluble oil) emulsion at pH 9.0–9.5 is the industry-standard recommendation. Neat (straight) oils can extend tool life by 20–30% but present hygiene and fire hazards. MQL (Minimum Quantity Lubrication) at oil flow rates of 50–100 ml/h is viable for drilling and tapping but not for general turning and milling of Hastelloy.

Coolant Type	Composition	Flow Rate	Tool Life Impact	Surface Finish	Hygiene/Safety	Cost	Best For
Dry (No Coolant)	None	N/A	-60–80% vs. flood	Poor; white layer	Good (no exposure)	Minimal	Lab test only - not production
5–8% Semi-Synthetic Emulsion	Mineral oil + water + additives	8–15 L/min (flood)	Baseline = 100%	Good (Ra 1.6–3.2)	Moderate (biocide required)	Low–Medium	General turning & milling
Neat (Straight) Cutting Oil	100% petroleum/vegetable oil	5–10 L/min	+20–30% vs. emulsion	Excellent (Ra 0.8–1.6)	Fire hazard; dermatitis risk	High	Deep-hole drilling; tapping
High-Pressure (10–20 bar) Emulsion	Same as semi-synthetic; delivered at pressure	10–20 L/min	+30–50% vs. standard flood	Very Good	Moderate	Medium	Internal coolant through tools; boring
MQL - Vegetable Oil 50–100 ml/h	Canola / rapeseed oil + air	50–100 ml/h oil	-15–25% vs. flood	Good	Good (low mist)	Low	Drilling < Ø20mm; threading
Cryogenic (LN₂ / CO₂)	Liquid nitrogen or CO₂ snow	0.5–2 L/min LN₂	+40–80% vs. flood	Very Good	Special handling required	Very High	High-value aerospace components

Semi-synthetic emulsions with extreme pressure (EP) additives containing sulfurized esters or chlorinated paraffins provide the best performance because the EP additives form a sacrificial boundary layer at the tool-chip interface, reducing friction and preventing workpiece material from welding to the tool rake face.

Coolant Application Technique: Where and How to Direct the Stream

Direct the coolant stream at the tool-chip interface - not at the tool-workpiece contact point - with a nozzle angle of 15–30° from the cutting edge plane. Through-tool coolant (internal cooling channels) is mandatory for drilling and boring operations, and provides 30–50% longer tool life compared to external flood alone.

The cutting zone in Hastelloy machining reaches 700–1,000°C at the tool tip even with flood coolant. The coolant must reach this zone fast enough to maintain the coating below ~850°C, where Al₂O₃ remains thermodynamically stable. This requires:

Nozzle diameter: 2–3 mm for flood; 0.8–1.2 mm for high-pressure through-tool coolant
Pressure: Minimum 10 bar for through-tool; 5–8 bar for flood application
Temperature: 15–25°C (cool coolant provides better heat removal; too cold causes thermal shock)
pH monitoring: Maintain 9.0–9.5 for semi-synthetics to prevent bacterial growth and skin irritation

MQL (Minimum Quantity Lubrication) can replace flood coolant for drilling, tapping, and short-duration machining operations on Hastelloy C-276, but is not recommended for turning or milling operations where cutting time exceeds 10 minutes, because MQL's heat removal capacity is insufficient to prevent thermal damage to carbide coatings at the continuous high temperatures involved.

MQL for Hastelloy

The research consensus (CIRP, ASME, and SAE technical papers, 2014–2023) consistently shows that MQL at 70–100 ml/h achieves approximately 70–80% of the tool life obtained with conventional flood cooling in nickel alloy machining, making it a viable option for shops that prioritize environmental compliance and coolant disposal costs over maximum tool life.

[Source] Khan, S.A. et al., "MQL Machining of Nickel-based Superalloys: A Critical Review," Journal of Manufacturing Processes, Elsevier, 2021.

If adopting MQL for Hastelloy, use high-oleic vegetable oils (canola or sunflower) rather than mineral oils, because the polar molecules in vegetable oils adsorb more effectively onto the active nickel surface, reducing built-up edge. Avoid synthetic esters at temperatures > 300°C at the cutting edge - they thermally decompose and leave carbonaceous residues.

The five primary tool wear modes in Hastelloy C-276 machining are, in order of frequency: flank wear (most common), built-up edge (BUE), crater wear, notch wear at the depth-of-cut line, and thermal cracking. Each has a distinct root cause - correctly identifying it tells you which parameter to adjust, rather than blindly changing the tool material.

Wear Mode	Appearance	Primary Cause	Parameter Adjustment	Secondary Cause
Flank Wear (VB)	Uniform wear land on rake face	Abrasive hard carbides (Mo/W borides)	Reduce cutting speed by 10–15%	Coating failure at high temp
Built-Up Edge (BUE)	Lumps of workpiece material on edge	Welding of Ni/Cr to tool surface	Increase rake angle or use sharper edge	Low cutting speed + inadequate coolant
Crater Wear	Depression on rake face	Chemical diffusion; high temp dissolution	Switch to Al₂O₃ coating (more stable)	Excessive cutting speed
Notch Wear	Deep groove at DOC line	Workpiece surface hardness variation	Reduce DOC; use stronger edge preparation	Thermomechanical cycling
Thermal Cracking	Cracks perpendicular to cutting edge	Thermal shock from intermittent coolant	Reduce coolant pressure; pre-warm	CVD coating tensile stress
Edge Chipping	Small fractures on cutting edge	Impact load; interrupted cut; worn edge	Reduce feed rate; check tool overhang	Excessive honing radius

Surface Integrity

Hastelloy C-276 machined surfaces can develop a "white layer" (hard, brittle, recrystallized layer 2–20 μm thick) and tensile residual stress (200–500 MPa) when cutting parameters are incorrect - even when the tool looks acceptable. Both degrade fatigue life by 30–60%, which is critical for aerospace and pressure vessel applications. Specify surface integrity requirements in your drawing notes and verify with surface roughness (Ra) and hardness traverse measurements.

White layer formation is driven by three factors:

Excessive cutting temperature (> 700°C at the surface) - caused by high cutting speed or inadequate coolant
Thermomechanical loading at the subsurface - caused by high feed rate with insufficient depth of cut
Retained austenite transformation - the FCC crystal structure of Hastelloy partially transforms to a harder phase under severe plastic deformation
To minimize white layer formation in Hastelloy C-276 components:
Use the lowest cutting speed compatible with acceptable cycle time (Vc = 35–50 m/min)
Apply flood coolant continuously - never stop coolant mid-operation
Maintain consistent depth of cut; avoid "air cutting" as the tool enters/exits
For fatigue-critical applications: specify post-machining stress relief at 600–650°C for 1–2 hours

Among the common Hastelloy grades, machinability ranges from: Hastelloy C-22 (N06022) ≈ Hastelloy C-276 (N10276) as the most difficult, to Hastelloy C-2000 (N06200) and B-2 (N10665) as slightly easier, to Hastelloy X (N06002) as the most machinable (approaching Inconel 625). The differences are driven primarily by molybdenum and tungsten content, which directly control work-hardening rate and abrasive wear.

Hastelloy Grade	UNS Number	Primary Alloying Elements	Machinability Rating (1=easiest, 5=hardest)	Key Machining Notes
Hastelloy B-2	N10665	Ni–Mo (Mo 26–30%, Fe≤2%)	⭐⭐ (Moderate)	Low Cr means less work-hardening; easier than C-276; avoid in HCl
Hastelloy B-3	N10675	Ni–Mo (Mo 28–32%, no Nb/Ta)	⭐⭐ (Moderate)	Improved thermal stability over B-2; similar machinability
Hastelloy C-22	N06022	Ni–Cr–Mo–W (Cr 20–22%, W 2–4%)	⭐⭐⭐⭐ (Very Hard)	Slightly easier than C-276 due to lower Mo; W adds wear resistance
Hastelloy C-276	N10276	Ni–Cr–Mo–W (Mo 15–17%, W 3–4.5%)	⭐⭐⭐⭐ (Very Hard)	Industry standard; most documented machining data; use all C-276 parameters
Hastelloy C-2000	N06200	Ni–Cr–Mo–Cu (Mo 15–17%, Cu 1.6%)	⭐⭐⭐ (Hard)	Copper addition reduces abrasive wear slightly; best for chemical plant service
Hastelloy G-30	N06030	Ni–Cr–Mo–Cu (Cr >30%, Cu 1.8%)	⭐⭐⭐ (Hard)	High Cr gives corrosion advantage; machinability similar to C-2000
Hastelloy X	N06002	Ni–Cr–Fe–Mo (Cr 20–22%, Fe 17–20%)	⭐⭐ (Moderate)	Most machinable Hastelloy; often machined at speeds 50–70 m/min; similar to Inconel 625
Hastelloy N	N10003	Ni–Mo–Cr (Mo 7%, Cr 7%, Al 5%)	⭐⭐⭐ (Hard)	Developed for nuclear; less common; machinability similar to C-276

Jinie Technology (Jiangsu) Co., Ltd. (JN Alloy) is a specialized manufacturer and global supplier of nickel alloys, superaustenitic stainless steels, and specialty corrosion-resistant alloys, including the complete Hastelloy family. We supply Hastelloy C-276 (UNS N10276), Hastelloy C-22 (N06022), Hastelloy B-2 (N10665), and Hastelloy X (N06002) in all commercial product forms, with full traceability and Mill Test Reports (EN 10204 3.1) accompanying every order.

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