Hastelloy B-3 Bar for Petrochemical Valve Stems

Our Hastelloy B-3 bar is a total rockstar for petrochemical valve stems, built to handle the nastiest corrosive environments without breaking a sweat. This nickel-molybdenum alloy, with about 65% nickel, 28% molybdenum, and a touch of chromium, iron, and cobalt, is our go-to for applications where corrosion resistance and strength are critical. Whether it’s valve stems, pump shafts, or structural supports in petrochemical systems, this bar keeps your equipment running smoothly and reliably.

For more details, pls directly contact us.

What makes Hastelloy B-3 bar stand out is its killer ability to resist corrosion from hydrochloric, sulfuric, and other reducing acids, which are common in petrochemical processing. It’s perfect for valve stems, fighting off pitting, crevice corrosion, and stress corrosion cracking to ensure your valves operate flawlessly with minimal maintenance. This bar keeps your systems leak-free and efficient, even in the toughest conditions.

This bar’s versatility is a huge win. It’s stable up to 760°C, which is plenty for valve stems in moderate-heat environments, like those in refineries or chemical plants. Its low thermal conductivity (~10 W/m·K) helps with thermal management, and its high strength ensures it holds up under mechanical stress. From oil refining to gas processing, Hastelloy B-3 delivers top-notch performance.

We love how workable this bar is, especially compared to other high-performance alloys. Its improved fabrication stability makes it easier to machine, forge, or weld into whatever your valve stem design needs—think precision stems or sturdy supports. Need a specific diameter, length, or finish? We can tailor it to fit your specs, ensuring smooth fabrication and keeping your project on track.

Parameter	Hastelloy B-3 Bar	Hastelloy B-2 Bar	Stainless Steel 316 Bar	Monel 400 Bar
Corrosion Resistance	Excellent (HCl, sulfuric acid)	Excellent, slightly less stable	Good, weaker in strong acids	Excellent, less effective in HCl
Thermal Conductivity	Low (~10 W/m·K)	Low (~10 W/m·K)	Low (~15 W/m·K)	Moderate (~22 W/m·K)
Thermal Stability	High (up to 760°C)	High (up to 700°C)	High (up to 870°C)	Moderate (up to 550°C)
Mechanical Strength	High, good ductility	High, slightly less ductile	Very high, less ductile	Good, high ductility
Formability	Moderate, easier than B-2	Moderate, harder to fabricate	Moderate, harder to machine	Excellent, easy to machine
Cost	High, due to alloy complexity	High, similar to B-3	Moderate, lower than Hastelloy	High, lower than B-3
Typical Applications	Valve stems, pump shafts	Acid processing, chemical linings	Marine fittings, chemical components	Marine supports, desalination parts
Durability	Long lifespan, excellent in acids	Long, slightly less in pitting	Long, varies in acidic environments	Very long, less in strong acids

The petrochemical industry’s all about materials that are tough, efficient, and sustainable, and Hastelloy B-3 bar checks every box. It’s recyclable, which is awesome for eco-friendly projects, and its long lifespan means less waste from replacements. With global demand for petrochemicals, green fuels, and specialty chemicals soaring—think cleaner energy and sustainable refining—Hastelloy B-3’s acid resistance is more critical than ever. Its low maintenance aligns with the trend toward cost-effective, green operations.

Specification

item	HC-276	C-22	C-4	B2	B3	N
C	≤0.01	≤0.015	≤0.015	≤0.02	≤0.01	0.04-0.08
Mn	≤1	≤0.5	≤1	≤1	≤3	≤1
Fe	4-7	2-6	≤3	≤2	≤1.5	≤5
P	≤0.04	≤0.02	≤0.04	≤0.04	--	≤0.015
S	≤0.03	≤0.02	≤0.03	≤0.03	--	≤0.02
Si	≤0.08	≤0.08	≤0.08	≤0.1	≤0.1	≤1
Ni	rest	rest	rest	rest	≤65	rest
Co	≤2.5	≤2.5	≤2	≤1	≤3	≤0.2
Ti+Cu	--	--	≤0.7	--	≤0.4	≤0.35
Al+Ti	--	--	--	--	≤0.5	≤0.5
Cr	14.5-16.5	20-22.5	14-18	≤1	≤1.5	6-8
Mo	15-17	12.5-14.5	14-17	26-30	≤28.5	15-18
B	--	--	--	--	--	≤0.01
W	3-4.5	2.5-3.5	--	--	≤3	≤0.5
V	≤0.35	≤0.35	--	0.2-0.4	--	≤0.5

Shape	Size (mm)
Wire	0.5-7.5
Rod/Bar	8.0-200
Strip	(0.5-2.5)*(5-180)
Tube/Pipe	Custom made
Sheet/Plate	Custom made

For more details, pls directly contact us.

Our Hastelloy B-3 bar sets the standard because we’re all about quality, customization, and customer success. We offer a wide range of diameters, lengths, and finishes, with fast delivery for both small and large orders. Our team dives into your project, optimizing the bar for your valve stems to ensure maximum corrosion resistance and durability. We keep pricing competitive, especially for bulk orders, without skimping on quality. Our sustainable production process uses recyclable materials, aligning with green industry trends. Plus, our hands-on support means you’re always covered—whether it’s technical guidance or a custom solution, we make it happen.

Compared to other materials, our Hastelloy B-3 bar is a standout. Hastelloy B-2 is great for acid resistance but less stable during fabrication and more prone to pitting. Stainless steel 316 is tough but struggles with strong acids like hydrochloric, unlike B-3. Monel 400 is corrosion-resistant but doesn’t match B-3’s performance in reducing acid environments. Our bar is the go-to for petrochemical valve stems.

We craft our Hastelloy B-3 bar to meet strict standards like ISO 9001, ensuring quality you can trust every time. Whether you’re building valve stems for refineries or supports for chemical systems, this bar’s ready to perform. Got a unique spec in mind? Let us know, and we’ll make it happen.

About Us:

Our 12,000㎡ factory is equipped with complete capabilities for research, production, testing, and packaging. We strictly adhere to ISO 9001 standards in our production processes, with an annual output of 1,200 tons. This ensures that we meet both quantity and quality demands. Furthermore, all products undergo rigorous simulated environment testing including high temperature, high pressure, and corrosion tests before being dispatched, ensuring they meet customer specifications. 

For all our clients, we offer timely and multilingual after-sales support and technical consulting, helping you resolve any issues swiftly and efficiently.

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FAQs:

1. What is Hastelloy B-3 bar made of?
   It’s a nickel-molybdenum alloy with about 65% nickel, 28% molybdenum, plus small amounts of chromium, iron, and cobalt for corrosion resistance.

2. What are the main uses for Hastelloy B-3 bar in petrochemical processing?
   It’s used for valve stems, pump shafts, and structural supports in systems handling corrosive fluids.

3. How does Hastelloy B-3 bar perform in acidic environments?
   It’s a champ, resisting corrosion from hydrochloric, sulfuric, and other reducing acids.

4. Can Hastelloy B-3 bar handle high temperatures?
   Yep, it’s stable up to 760°C, great for valve stems in moderate-heat petrochemical systems.

5. Is Hastelloy B-3 bar cost-effective?
   It’s pricier than stainless steel, but its durability in harsh environments makes it a smart long-term choice.

6. How does Hastelloy B-3 bar compare to Hastelloy B-2 bar?
   B-3 offers better thermal stability and easier fabrication, while B-2 is slightly less resistant to pitting.

7. Can Hastelloy B-3 bar be customized?
   Totally! We can adjust diameter, length, or finish to meet your specific valve stem needs.

8. Is Hastelloy B-3 bar environmentally friendly?
   It’s recyclable, supporting green practices, and its long lifespan reduces waste from replacements.