Hastelloy B3 (Alloy B-3, UNS N10675) Forging Parts | China Jiangyin Leading Manufacturer

Premium UNS N10675 Hastelloy B3 forged round bars produced at our Jiangyin, Jiangsu, China manufacturing facility

Jiangsu Liangyi Co., Limited is located in Jiangyin City, Jiangsu Province  — the center of China’s advanced forging industry. We are a professional manufacturer with over  25 years of experience , certified by ISO 9001:2015. We make Hastelloy B3 (Alloy B-3, UNS N10675) open die forging parts, seamless rolled steel forged rings, and custom-made parts. We serve strict industrial customers in more than 50 countries in North America, Europe, the Middle East, Asia-Pacific, South America, and Africa, and we have a proven history of providing high-quality, corrosion-resistant nickel-molybdenum alloy forgings. 

Hastelloy B3 is a third-generation advanced nickel-molybdenum alloy. It has excellent resistance to hydrochloric acid (HCl) at all concentrations and temperatures, — from weak solutions to boiling 37% HCl. It also resists corrosion well from sulfuric acid (H₂SO₄), acetic acid (CH₃COOH), formic acid (HCOOH), phosphoric acid (H₃PO₄), and other non-oxidizing substances. Compared to its previous version, Hastelloy B2, Alloy B-3 has 2 to 3 times better thermal stability (which reduces intermetallic phase formation during welding and heat treatment). It also has better stress corrosion cracking (SCC) resistance in chloride and acidic environments, and is easier to weld with little corrosion in the heat-affected zone (HAZ).These features make Hastelloy B3 the best choice material for important uses in the oil and gas, chemical processing, and nuclear power industries.

As a top Hastelloy B3 forging supplier in China, we offer a full range of manufacturing services from raw material melting (with triple or double melting options), open die forging, heat treatment, in-house CNC machining to final strict quality checks. All processes are done at our 80,000 square meter facility in Jiangyin. This guarantees strict quality control, competitive delivery times (usually 4 to 6 weeks for standard orders), and complete traceability from raw material to the finished product.

Custom UNS N10675 Hastelloy B3 seamless rolled rings for a Middle East oil and gas refinery upgrade project

Oil & Gas Industry Projects

North Sea Deepwater Drilling Project (UK):  We supplied custom-made Hastelloy B3 forged drilling collars and mud motor shafts to a major offshore operator. This operator works in high-sulfur gas fields with 15% H₂S content and downhole temperatures of 120°C. A DNV GL inspector, appointed by the end client, conducted a third-party inspection to confirm that the material meets NACE MR0175 / ISO 15156 requirements. Compared to the alloy steel parts they replaced, these parts lasted much longer, and the project was finished on time.

Middle East Refinery Upgrade (Saudi Arabia): We supplied more than Alloy B-3 valve bodies, seat rings, and bonnets for a major refinery modernization project in the Middle East. These components are designed to work with 37% hydrochloric acid at 120°C in the catalytic cracking unit. All parts were made using a triple melting process (VIM+ESR+VAR) to make sure they have the highest purity. According to the latest feedback from the customer, these parts have been working well for over 5 years without any corrosion-related breakdowns.

Gulf of Mexico Offshore Platform (USA):  Our UNS N10675 casing heads and tubing hangerswere chosen for a deepwater platform project in the Gulf of Mexico, where the water depth reaches 1,800 meters. We made these parts to meet the customer’s API 6A PSL-4 dimensional and material requirements, as well as the NACE MR0175 / ISO 15156 requirements for sour service. All test results were checked and confirmed by a third-party inspector appointed by the customer. These parts have been working reliably since they were installed.

Chemical Industry Projects

German Hydrochloric Acid Plant (Major European Chemical Group):  We made a complete  Hastelloy B3 seamless piping system and heat exchanger tube sheets for a top European chemical group’s large-scale hydrochloric acid plant. These products have been working well at 120°C with 37% hydrochloric acid for more than 8 years, and no corrosion-related maintenance has been needed so far. Later, the client placed repeated orders for the plant’s expansion projects.

Chinese Phosphate Fertilizer Complex (Yunnan): Our Alloy B-3 pump impellers and casings solved an important wear and corrosion problem in the phosphoric acid extraction process at a large Chinese fertilizer complex. The old 316L stainless steel pumps had to be replaced every six months because they corroded and eroded so badly. Our Hastelloy B3 pumps have been working well for four years without any failures, which has saved the customer a lot of money on replacement parts and production downtime costs.

Nuclear Power Applications

China Generation III Nuclear Power Plant (HPR1000):  We supplied key  Hastelloy B3 nuclear reactor coolant pump (RCP) casings and impellers to a major nuclear equipment contractor. Their project needed the products to meet ASME Section III and RCC-M material and testing standards. All our forgings were given UT/RT/MT/PT non-destructive testing, full chemical and mechanical verification, and complete EN 10204 3.2 material traceability documentation as needed by the contractor’s quality plan. These parts passed all inspections by the contractor and their authorized third-party inspectors, and have been put into use at China’s nuclear power facilities.

Besides chemical composition and tensile strength, the physical and thermal properties of Hastelloy B3 directly influence every decision our forging engineers make — from calculating the press tonnage and setting the die preheating time, to determining the cooling rate after forging and the parameters for machining. The table below summarizes all the physical properties of UNS N10675, along with our internal engineering notes explaining what each property value means in actual open die forging (with forging weights ranging from 5 to 30 tons).

Service Temperature Range: What Our Forge Data Tells Us

Based on more than 25 years of supplying Hastelloy B3 forgings to operating plants and reviewing service feedback from clients, we advise the following temperature boundaries for forged UNS N10675 parts:

The corrosion resistance of a nickel‑molybdenum alloy depends heavily on the quality of the forging. Residual stress from poor forging, uncontrolled cooling, or insufficient solution annealing can create small galvanic areas that speed up corrosion up to 10 times faster than standard test data. The values below show the performance of properly forged, solution‑annealed, and machined UNS N10675 parts — not just laboratory test samples made from flat rolled material.

Corrosion Rates in Key Industrial Media (Solution-Annealed Forgings)

Note: Corrosion rate reference values come from public industry technical documents for UNS N10675, N10665, N10276 and 316L stainless steel. These values are based on properly solution‑annealed, stress‑free test samples under controlled lab conditions. Real‑world performance can differ based on operating temperature, fluid flow speed, impurities, and part shape. Residual stress from poor forging, heat treatment or machining can greatly increase corrosion rates. All Jiangsu Liangyi forgings are solution‑annealed at 1121°C with fast water quenching to reduce residual stress and meet these published performance standards.

How Forging Quality Directly Impacts Corrosion Resistance

A detail rarely discussed in material datasheets — but one our quality engineers see in every production lot — is the relationship between forging process parameters and in-service corrosion behavior. Three specific forging variables that we control rigorously at our Jiangyin facility have a measurable impact on corrosion resistance:

While both Hastelloy B3 and Hastelloy B2 are nickel-molybdenum alloys with excellent resistance to hydrochloric acid and other non-oxidizing media, Hastelloy B3 has several significant advantages over its predecessor:

Due to these significant advantages, Hastelloy B3 is now the preferred material choice for most new industrial applications that previously used Hastelloy B2. However, Hastelloy B2 may still be suitable for some existing applications or simple, non-welded parts. Contact our engineering team to discuss which alloy is best for your specific application.

The three nickel alloys most often compared for forging applications where corrosion resistance is important are Hastelloy B3 (UNS N10675), Hastelloy C276 (UNS N10276), and Inconel 625 (UNS N06625). We have been forging all three alloys for more than 25 years and shipping them to the same industries around the world. Our engineering team has created a practical, procurement-focused comparison that goes beyond the standard data found in product sheets. The chart below shows how these alloys perform in real-world forging, their fabrication features, and their total cost over time — not just test data from corrosion samples.

Our Procurement Recommendation Framework

After reviewing thousands of material selection inquiries from engineers in 50+ countries, our technical team has developed a simple three-question decision framework that correctly identifies the optimal alloy in over 90% of cases:

1. Is HCl (hydrochloric acid) the primary or dominant corrosive agent in your process? → If yes, Hastelloy B3 is almost always the correct choice. No other commercially forged alloy matches its resistance to reducing acid environments, particularly at elevated temperatures.
2. Is your process stream a complex or variable mixture of oxidizing and reducing media, or do you need resistance to a wide range of acids without knowing the exact composition? → If yes, Hastelloy C276 is the most robust all-rounder and the lowest-risk material selection for multi-media environments.
3. Is chloride-induced pitting, seawater corrosion, or mechanical fatigue in a mildly corrosive offshore environment your primary concern — rather than aggressive reducing acid resistance? → If yes, Inconel 625 has the best combination of pitting resistance, fatigue strength, and fabrication flexibility at a more favorable cost per kilogram for large structural forgings.

If your application doesn't map cleanly to any of the three scenarios above — for example, a cyclic process that alternates between HCl and HNO₃ service — please send our engineering team your process conditions. We will prepare a formal material selection recommendation report at no cost within 48 hours.

At our Jiangyin company,we fully control production process to make sure Hastelloy B3 forgings have the highest quality . Our state-of-the-art equipment includes 2000T, 4000T, and 6300T hydraulic forging presses, 1T, 3T, 5T, and 9T electro-hydraulic forging hammers, 1m and 5m seamless ring rolling machines, and ten heat treatment furnaces. Our quality inspection laboratory has advanced nondestructive testing (NDT), chemical composition testing, mechanical property testing, and metallographic testing equipment. Learn more about our forging and inspection equipment.

 Quality is the most important thing to us at Jiangsu Liangyi. We provide high-quality Hastelloy B3 forgings that meet or exceed  our customers need. All of the parts meet international standards. We are ISO 9001:2015 certified, and we have supplied clients from more than 50 countries with nickel-molybdenum alloy forgings that are reliable and resistant to corrosion.

Comprehensive Quality Inspection & Testing Services

Our modern quality inspection laboratory has advanced testing equipment to perform a wide range of tests on all Hastelloy B3 forgings:

• Chemical Composition Analysis: Optical Emission Spectrometry (OES), X-ray Fluorescence (XRF), and Carbon/Sulfur (C/S) analysis
• Mechanical Property Testing: Tensile testing, yield strength testing, elongation testing, reduction of area testing, bending testing, impact testing (Charpy V-notch), and hardness testing (HB, HRC, HV)
• Nondestructive Testing (NDT): Ultrasonic Testing (UT), Radiographic Testing (RT), Magnetic Particle Testing (MT), Liquid Penetrant Testing (PT), Visual Testing (VT), and Dimensional Testing (DT)
• Metallographic Examination: Microstructure analysis, macrostructure analysis, grain size measurement, and inclusion rating using optical and electron microscopes
• Corrosion Testing: Intergranular corrosion testing (Huey test), salt spray testing, and custom corrosion testing per customer specifications
• Other Testing: Positive Alloy Material Identification (PAMI), 3D dimensional inspection, pressure testing, and leak testing (upon request)

International Standards & Certifications

Our Hastelloy B3 forgings are made per the following international standards and can be supplied with the following certifications:

• Material & Product Standards (forgings manufactured to): ASTM B333 / B333M, ASTM B564, AMS 5756, AMS 5757, DIN 17744 and EN 2.4836
• Quality Management Certification (held by Jiangsu Liangyi): ISO 9001:2015
• Customer Project Standards (forgings supplied to meet customer-specified requirements): API 6A, API 6D, NACE MR0175 / ISO 15156, ASME Section VIII, EN 13445 — compliance verified through customer-appointed third-party inspection (SGS, BV, TUV, DNV GL, ABS, etc.)
• Nuclear Project Requirements (via prime contractor's QA programme): ASME Section III, RCC-M — our forgings have been supplied as part of projects governed by these standards, with testing and verification managed by the prime nuclear contractor
• Mill Test Certificates Issued: EN 10204 3.1 (internal inspection) or EN 10204 3.2 (with third-party countersignature)

Third-party inspection services from SGS, BV, TUV, DNV GL, ABS, and other reputable organizations are available upon request. We also welcome customer witness inspections at our Jiangyin, Jiangsu, China manufacturing facility.

Hastelloy B3 is the best choice material for a wide range of demanding industrial applications, but it is not suitable for all environments. Use this guide to help determine if Hastelloy B3 is the right material for your specific application:

When to Use Hastelloy B3

• It is used for  hydrochloric acid (HCl) at any concentration and temperature, from dilute solutions to boiling 37% HCl
• Uses involving sulfuric acid (H₂SO₄), acetic acid (CH₃COOH), formic acid (HCOOH), phosphoric acid (H₃PO₄), and other non-oxidizing media
• Uses needing great stress corrosion cracking (SCC) resistance in chloride-containing acidic environments
• Uses needing good weldability with minimal heat-affected zone (HAZ) corrosion
• Uses needing high thermal stability to resist intermetallic phase formation during welding and heat treatment
• Important uses in the oil and gas, chemical processing, and nuclear power industries

When NOT to Use Hastelloy B3

• Applications involving oxidizing media, such as nitric acid (HNO₃), ferric chloride (FeCl₃), cupric chloride (CuCl₂), and wet chlorine gas — Hastelloy C276, C22, or other nickel-chromium-molybdenum alloys are the best  choice materials  for these environments
• Applications involving mixed oxidizing and reducing acids without careful testing — consult our engineering team for material selection recommendations
• Applications needing high-temperature oxidation resistance above 800°C — Inconel 600, 601, or other nickel-chromium alloys are better choices for these environments
• Simple, non-welded parts where Hastelloy B2 may be a more cost-effective option (although Hastelloy B3 is still preferred for most new applications)

If you are unsure whether Hastelloy B3 is the right material for your specific application, please contact our engineering team for a free material selection consultation.

Most material data sheets only describe the weldability of Hastelloy B3 in one short sentence. As a forging manufacturer that supplies UNS N10675 parts to fabricators worldwide, we have a much more practical understanding. We see how our forgings perform when welded, reheated, and installed into process equipment, and we also see the failure patterns that occur when any step is carried out improperly. The guidance below is what we share with every customer who buys our Hastelloy B3 forgings for further manufacturing.

Why B3 Is More Weldable Than B2 — and What It Still Requires

The main metallurgical improvement that sets Hastelloy B3 apart from B2 is the addition of about 1–3% chromium and lower iron content. These changes greatly slow down the formation of Ni₄Mo intermetallic particles in the heat-affected zone (HAZ) during welding.In B2, a single weld pass can make the HAZ prone to corrosion in just 2–3 minutes at 600–750°C. In B3, this safe time window extends to roughly 20–30 minutes at the same temperatures. This gives fabricators much more time for multi-pass welding, repair welding, and stress relief without losing corrosion resistance. Still, being “easier to weld than B2” does not mean it can be welded without careful control. We recommend the following procedures, which are also required by our nuclear and oil & gas customers in their official welding specifications (WPS/PQR):

Machining Hastelloy B3 After Forging: Practical Parameters

Hastelloy B3 is classified as a difficult-to-machine material due to its high work-hardening rate, tendency to built-up edge (BUE) formation on cutting tools, and significant cutting forces. The table below summarizes the machining parameters our in-house CNC team uses on production forgings — parameters refined over thousands of hours of machining 5–30 ton Ni-Mo alloy parts:

For parts that need tight tolerances of ±0.1mm or closer, or complex 5-axis shapes, our in-house machining team can finish the part to your exact drawing requirements. This avoids the risk of damage from re-clamping the part at an outside machine shop and guarantees complete quality traceability under our ISO 9001:2015 system, all the way from raw material to the finished product.

Jiangsu Liangyi produces open die forgings and seamless rolled rings in a full range of high-performance nickel alloys. If your application needs change, or if you are comparing several materials at the same time, we also offer the following alloy groups from our Jiangyin factory. They meet the same quality standards, hold the same certifications, and have the same lead times as our Hastelloy B3 forgings:

View our complete nickel alloy forging material grades page or contact our technical sales team to discuss which alloy best fits your application requirements. We can supply comparison quotations for different alloys simultaneously to simplify your material selection and procurement process.

Jiangsu Liangyi has many experience in exporting high-quality Hastelloy B3 (UNS N10675) forgings to customers in 50+ countries worldwide. Our dedicated logistics Jiangsu Liangyi has many experience in exporting high-quality Hastelloy B3 (UNS N10675) forgings to customers in more than 50 countries around the world .Our logistics team handles every step of the shipping process, from packing and paperwork to customs clearance and final delivery, to make sure our customers have a smooth and trouble-free experience.

Shipping Options

• Sea Freight: This is the cheapest way to ship large or heavy orders. It usually takes 20 to 45 days to get there, depending on where it is going.
• Air Freight: It is a faster option for urgent or smaller orders, with typical transit times of 3–10 days depending on the destination
• Express Courier: It is the fastest option for small samples or urgent spare parts, with normal transit times of 1–5 days depending on the destination (DHL, FedEx, UPS, TNT available)

Regional Logistics Transit Times

Please note that these are typical transit times and may vary depending on the specific destination, shipping line/airline, and customs clearance procedures. For a more accurate shipping quote and transit time estimate, please contact our logistics team.