Haynes HR-160 (UNS N12160) - Sulfidizing Atmosphere Resistant Alloy Supplier | Shanghai Hangbo Alloy Group

By Shanghai Hangbo Alloy Group Co., Ltd. - China Supplier | ISO 9001:2015 | Est. 2012

Contact: sales@hangboalloy.com | hangbo@nickel-alloy.com | WhatsApp (Lisa): +86 13611656360

Quick Answer: What Is Haynes HR-160?

Haynes HR-160 (UNS N12160 / W.Nr. 2.4655) is a nickel-cobalt-chromium-silicon alloy specifically engineered to resist sulfidizing (H₂S/SO₂-containing) and chlorine-containing atmospheres at temperatures up to 1095°C (2000°F) — the harsh environment found in waste incinerators, coal gasifiers, and petrochemical heaters. Its 2.7% silicon content forms a protective SiO₂ sub-scale that blocks sulfur and chlorine diffusion, a capability that defeats both stainless steels and most nickel alloys. Shanghai Hangbo Alloy Group supplies Haynes HR-160 as bars, tubes, and sheets.

Industry Pain Point: Waste-to-energy plant operators struggle with superheater tube corrosion: flue gas from municipal solid waste contains 100-500 ppm HCl, 50-200 ppm SO₂, and chlorides that condense on tube surfaces at 400-500°C. Standard materials (T22, 310SS) corrode at 1-3 mm/year, requiring tube replacement every 2-3 years. HR-160's SiO₂ + Cr₂O₃ composite scale reduces corrosion rates by 5-10x in this exact environment, extending superheater life to 8-12 years and saving millions in forced outage costs.

Key Properties at a Glance

Product Overview

Haynes HR-160 was developed by Haynes International in response to the corrosive atmospheres of waste incineration and coal gasification — environments combining sulfur (H₂S, SO₂), chlorine (HCl, Cl₂), and oxidizing/reducing cycles that no conventional alloy could survive.

The alloy's metallurgical strategy is a "triple defense":

• 37% Nickel + 28% Cobalt: The high Ni+Co content provides a sulfidation-resistant matrix. Sulfur attacks chromium preferentially in most alloys; the nickel-cobalt base suppresses the catastrophic sulfidation that destroys iron-based alloys.
• 28% Chromium: Provides the conventional Cr₂O₃ oxidation barrier.
• 2.7% Silicon: The signature element. Silicon forms a vitreous SiO₂ sub-layer beneath the Cr₂O₃ scale — a diffusion barrier against both sulfur (S₂, H₂S) and chlorine (Cl₂, HCl) penetration. This is the same mechanism that gives silicon-bearing cast irons their acid resistance, refined for high-temperature service.

HR-160 also resists hot corrosion (sulfate-chloride salt deposits) through its elevated chromium and controlled silicon, and maintains excellent thermal stability — no sigma-phase embrittlement after 10,000 hours at 700-870°C.

Shanghai Hangbo Alloy Group supplies HR-160 in bars, seamless tubes, and sheets with ASTM certification.

Executive Standards

Chemical Composition (wt.%)

Mechanical & Physical Properties

Room-Temperature (Solution-Annealed)

Elevated-Temperature (Typical)

Heat Treatment

Solution Annealing: 1177C (2150F), rapid air cool or water quench. No precipitation hardening.

Corrosion Performance

Industry Applications

Quality Assurance: 7-Stage

1. Raw Material: Ni, Co, Cr, Si analyzed by OES. Silicon source purity >=99.9%.
2. VIM Melt: Si 2.4-3.0%, Co +/-0.5%, Cr +/-0.3% control.
3. Hot Working: 1150-1200C, finishing >=1000C, reduction >=4:1.
4. Solution Anneal: 1177C verified, hardness 85-95 HRB.
5. Corrosion Test: H₂S exposure test per lot on request.
6. NDE: 100% UT bars >=50mm; ET/hydro tubes. PMI every piece.
7. Documentation: EN 10204 3.1 MTC. SGS/TUV/BV witness.

Frequently Asked Questions

Q1: What is Haynes HR-160 used for?

Waste incinerator superheater tubes, coal gasifier syngas coolers, petrochemical heater tubes in sour service, and fluidized bed combustor components — environments rich in sulfur and chlorine compounds.

Q2: What makes HR-160 special?

The 2.7% silicon content forms an SiO₂ sub-scale that blocks sulfur and chlorine diffusion — a capability standard stainless steels and most nickel alloys lack.

Q3: HR-160 vs HR-120?

HR-120: Ni-37Cr-3Fe-0.2C, moderate sulfidation resistance, higher strength, lower cost. HR-160: Ni-29Co-28Cr-2.7Si, superior sulfidation/chlorination resistance, higher cost. 160 for severe sulfur duty; 120 for general high-temp.

Q4: HR-160 vs Inconel 625?

625 has better aqueous corrosion and oxidation resistance but significantly worse sulfidizing resistance. 160 is chosen for dry sulfidizing atmospheres; 625 for wet chemical service.

Q5: Is it weldable?

Yes, with matching HR-160 filler (ERNiCrCoMo-1 type / FM 160). GTAW preferred.

Q6: What is the price?

$55-90/kg EXW. Contact sales@hangboalloy.com.

Q7: What product forms?

Bars (6-200mm), seamless tubes (OD 10-219mm), sheets (0.5-6mm), plates. SGS available.

Q8: What is the maximum service temperature?

~1095°C (2000°F) for continuous service.

Q9: Does it resist chlorine?

Yes — the SiO₂ barrier provides outstanding resistance to chlorine-containing gases, a capability few alloys possess.

Q10: What is the density?

8.08 g/cm3.

Q11: What heat treatment?

Solution annealing at 1177°C, rapid cool.

Q12: Why cobalt in the alloy?

Cobalt (26-30%) partners with nickel to form the sulfidation-resistant matrix and provides hot strength at 800-1000°C.

Q13: Does Shanghai Hangbo ship internationally?

Yes — FOB/CIF/DAP to 40+ countries.

Q14: How does it compare to 310 stainless?

310SS corrodes at 1-3 mm/yr in waste incinerator flue gas. HR-160 reduces this 5-10x, extending superheater life from 2-3 to 8-12 years.

Q15: What standards apply?

ASTM B572 (bar), B677 (tube), B435 (sheet/plate), B366 (fittings).

Contact Shanghai Hangbo Alloy Group

Shanghai Hangbo Alloy Group - Complete Product Range

Product Forms: Bars(6-500mm) | Tubes(OD 6-610mm) | Plates(0.1-100mm) | Forgings | Welded Pipes | Fittings | Wire(0.05-10mm) | Strip(0.02-4.0mm)

SGS/BV/TUV. Contact: sales@hangboalloy.com | WhatsApp (Lisa): +86 13611656360 | www.nickel-alloy.com