Haynes HR-120 (UNS N08120) - Cost-Effective High Temperature Alloy Supplier of Bars, Tubes & Plates | Shanghai Hangbo Alloy Group
Date: 2026年8月7日 Categories: News Views: 253
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-120?
Haynes HR-120 (UNS N08120) is a cost-effective iron-nickel-chromium high-temperature alloy with 37% nickel, 25% chromium, and nitrogen-plus-boron micro-alloying that delivers creep strength and oxidation resistance comparable to Inconel 617 at approximately half the cost — because its iron content (~30%) replaces expensive nickel. It is specified to ASTM B409/B408/B407 and is the material of choice for furnace radiant tubes, heat-treat fixtures, and petrochemical heater tubing operating at 900-1095°C where budget-conscious engineers need 617-class performance. Shanghai Hangbo Alloy Group supplies Haynes HR-120 as round bars, seamless tubes, and plates.
Industry Pain Point: Furnace fabricators face a recurring value analysis: Inconel 617 delivers outstanding creep strength to 1095°C but its 55% nickel content makes it prohibitively expensive for large fabricated components (a 6-meter radiant tube can weigh 500+ kg). HR-120 -- with 37% nickel and 30% iron -- delivers approximately 85-90% of 617's creep-rupture strength at 50-55% of the material cost, plus superior cyclic oxidation resistance. For long radiant tubes and large fixtures, this translates to savings of $15,000-40,000 per furnace.
Key Properties at a Glance
| Property | Value |
|---|---|
| UNS Number | N08120 |
| W.Nr. | 2.4835 |
| Alloy Family | Fe-Ni-Cr High-Temperature (Nickel-Base Equivalent) |
| Density | 7.97 g/cm3 |
| Melting Range | 1330-1380C |
| Max Service Temp. | ~1095C (2000F) |
| Tensile (Ann.) | >= 600 MPa (87 ksi) |
| Yield (Ann.) | >= 280 MPa (41 ksi) |
| Elongation (Ann.) | >= 30% |
| Key Standards | ASTM B409, B408, B407 |
Product Overview
Haynes HR-120 represents the "economic engine" of the high-temperature alloy lineup: a nickel-chromium alloy diluted with ~30% iron to cut cost without sacrificing the properties that matter at 900-1095°C. The alloy's chemistry is optimized around three mechanisms:
- 37% Nickel + 25% Chromium: Provides the austenitic matrix, oxidation resistance, and hot strength foundation. The chromium content equals Inconel 617's, providing equivalent oxidation resistance.
- 0.2% Nitrogen: The key strengthening element -- interstitial nitrogen doubles the yield strength contribution of the matrix, partially compensating for the reduced nickel content versus 617.
- 0.003-0.006% Boron + 0.8% Niobium: Grain-boundary strengtheners that suppress intergranular creep failure, the dominant high-temperature degradation mode. Boron segregates to grain boundaries and improves creep ductility; niobium forms stable MC carbides that pin boundaries.
HR-120 vs. the alternatives:
| Property | HR-120 | Inconel 617 | Incoloy 800H |
|---|---|---|---|
| Nickel Content | 37% | 55% | 32% |
| Max Service Temp. | 1095C | 1095C | 815C |
| 1000h Rupture at 1000C | ~18 MPa | ~22 MPa | ~6 MPa |
| Cyclic Oxidation (1095C) | Excellent | Good | Moderate |
| Relative Cost | 1.0x | 1.8-2.0x | 0.7x |
HR-120 occupies the sweet spot: 617-class temperature capability at a cost premium of only ~40% over 800H, which itself cannot survive above ~900°C.
Shanghai Hangbo Alloy Group supplies HR-120 in bars, seamless tubes, and plates.
Executive Standards
| Product Form | ASTM | ASME |
|---|---|---|
| Plate, Sheet & Strip | ASTM B409 | ASME SB-409 |
| Bar & Rod | ASTM B408 | ASME SB-408 |
| Seamless Pipe & Tube | ASTM B407 | ASME SB-407 |
| Forgings | ASTM B564 | ASME SB-564 |
| Welding Filler | ERNiCr-3 or matching | AWS A5.14 |
Chemical Composition (wt.%)
| Element | Min | Max | Role |
|---|---|---|---|
| Ni | 35.0 | 39.0 | Austenite stability; hot strength |
| Cr | 23.0 | 27.0 | Oxidation resistance (matches 617) |
| Fe | Balance | -- | Cost-reduction element |
| C | 0.02 | 0.10 | MC carbide strengthener |
| N | 0.10 | 0.20 | Interstitial strength -- cost-offset enabler |
| Nb | 0.40 | 0.90 | Stable MC carbides; grain-boundary pinning |
| B | 0.002 | 0.006 | Grain-boundary creep strengthener |
| Mn | -- | 1.5 | Deoxidizer |
| Si | -- | 1.0 | Deoxidizer |
| Mo | -- | 2.5 | Minor solid-solution strengthener |
| W | -- | 2.5 | Minor solid-solution strengthener |
| Co | -- | 3.0 | Incidental |
| Al | -- | 0.40 | Deoxidizer |
| Ti | -- | 0.20 | Carbide former |
Mechanical & Physical Properties
Room-Temperature (Solution-Annealed 1177C/AC)
| Property | Value |
|---|---|
| Tensile Strength | >= 600 MPa (87 ksi) |
| Yield Strength 0.2% | >= 280 MPa (41 ksi) |
| Elongation | >= 30% |
| Hardness | ~80-90 HRB |
Elevated-Temperature (Typical)
| Temperature | Tensile (MPa) | Yield (MPa) |
|---|---|---|
| 20C | 700 | 360 |
| 650C | 540 | 220 |
| 870C | 240 | 130 |
| 1000C | 110 | 60 |
Creep-Rupture Strength (10,000 h, Typical)
| Temperature | HR-120 | Inconel 617 |
|---|---|---|
| 870C | ~32 MPa | ~38 MPa |
| 980C | ~12 MPa | ~15 MPa |
| 1095C | ~4 MPa | ~6 MPa |
Physical Properties
| Property | Value |
|---|---|
| Density | 7.97 g/cm3 |
| Thermal Conductivity (20C) | ~12 W/m-K |
| Melting Range | 1330-1380C |
| Magnetic | Non-magnetic |
Heat Treatment
Solution Annealing: 1177C (2150F), rapid air cool or water quench. No precipitation hardening.
Production Process
1. Bars & Forgings
- Melting: AOD or VIM. Nitrogen metered precisely (0.10-0.20%) -- the strength-critical element.
- Hot Working: 1100-1180C, finishing >=980C, reduction >=4:1.
- Solution Anneal: 1177C, rapid cool. Hardness check.
- UT & Finishing: 100% UT for bars >=50mm. PMI every piece.
2. Seamless Tubes
- Extrusion: 1120-1180C.
- Cold Pilgering: Multi-pass with intermediate anneals.
- Final Anneal: 1177C, rapid cool.
- Testing: 100% hydrostatic/ET. Flattening/flaring per ASTM B407.
Industry Applications
| Industry | Component | Why HR-120? |
|---|---|---|
| Heat Treatment | Radiant tubes, muffles, retorts, fixtures | 617-class temperature at half cost |
| Petrochemical | Heater tubes, transfer lines, ethylene quench boilers | 900-1050C service with carburization resistance |
| Waste Incineration | Afterburner chambers, kiln components | Cyclic oxidation + moderate sulfidizing resistance |
| Power Generation | Boiler tube hangers, combustion liners | Creep strength to 1000C |
| Metal Processing | Continuous furnace rolls, strip furnace hardware | Scale-resistant, cost-effective for large parts |
Quality Assurance: 7-Stage
- Raw Material: FeCr, Ni, FeNb, boron master alloy verified by OES/ICP.
- AOD/VIM Melt: N +/-0.02%, Cr +/-0.3%, B verified by ICP-OES.
- Hot Working: 1100-1180C, finishing >=980C, reduction >=4:1.
- Solution Anneal: 1177C verified.
- Creep Testing: 10,000-h rupture verification on request per lot.
- NDE: 100% UT bars >=50mm; ET/hydro tubes. PMI every piece.
- Documentation: EN 10204 3.1 MTC. SGS/TUV/BV witness.
Frequently Asked Questions
Q1: What is Haynes HR-120 used for?
Furnace radiant tubes, muffles, heat-treat fixtures, petrochemical heater tubes, boiler hangers, and combustion liners operating at 900-1095°C -- anywhere 617-class performance is needed at a budget-friendly cost.
Q2: HR-120 vs 617?
HR-120: 85-90% of 617's creep strength, equal oxidation resistance, at 50-55% of the cost. The ~30% iron content is the price difference.
Q3: HR-120 vs HR-160?
HR-160: Ni-Co-Cr-Si, superior sulfidizing/chlorination resistance, higher cost. HR-120: Fe-Ni-Cr, general high-temperature service, lower cost. 160 for sulfur duty; 120 for general.
Q4: HR-120 vs Incoloy 800H?
HR-120: max temp 1095C vs 815C, 3x creep strength at 1000C, ~40% higher cost. Upgrade when service exceeds 900°C.
Q5: Is it weldable?
Yes, with ERNiCr-3 (Inconel 82) or matching filler. GTAW preferred.
Q6: What is the maximum service temperature?
~1095°C (2000°F) for continuous service.
Q7: What is the price?
$25-45/kg EXW -- approximately half of 617. Contact sales@hangboalloy.com.
Q8: What product forms?
Bars (6-300mm), seamless tubes (OD 10-219mm), plates (3-50mm), forgings. SGS available.
Q9: What is the density?
7.97 g/cm3.
Q10: What heat treatment?
Solution annealing at 1177°C, rapid cool. No aging.
Q11: Does it resist carburization?
Good resistance -- the high chromium (25%) + moderate nickel (37%) provides carburization protection superior to 800H.
Q12: Does Shanghai Hangbo ship internationally?
Yes -- FOB/CIF/DAP to 40+ countries.
Q13: Why nitrogen at 0.2%?
Nitrogen provides interstitial strengthening that partially compensates for the reduced nickel, enabling 617-class strength at half the cost.
Q14: What standards apply?
ASTM B409 (plate), B408 (bar), B407 (tube), B564 (forgings).
Q15: Can HR-120 replace 800H directly?
Yes, for services above 900°C or where 800H's creep strength is insufficient. For service below 815°C, 800H remains more economical.
Contact Shanghai Hangbo Alloy Group
| Channel | Details |
|---|---|
| Company | Shanghai Hangbo Alloy Group Co., Ltd. - China Supplier |
| Website | www.nickel-alloy.com |
| Email (Sales) | sales@hangboalloy.com |
| Email (Technical) | hangbo@nickel-alloy.com |
| WhatsApp (Lisa) | +86 13611656360 |
| Address | Room 1508, No. 288 Shiyi Road, Baoshan District, Shanghai 200940, China |
Shanghai Hangbo Alloy Group - Complete Product Range
| Family | Available Grades |
|---|---|
| Pure Nickel | NI200, NI201, N4, N5, N6 |
| Monel | 400, 401, 404, K-500, R-405 |
| Inconel | 600, 601, 617, 625, 690, 693, 718, X-750, 725 |
| Incoloy | 800, 800H, 800HT, 825, 925, 926, A-286, 25-6HN, 27-7MO |
| Hastelloy | C-276, C-22, C-2000, C-4, G-30, G-35, X, B-2, B-3, B-4, N |
| Super Austenitic | 904L, Alloy 28, Alloy 31, 254SMO |
| Chromium-Rich | Alloy 33 |
| High-Strength Stainless | Nitronic 50, PH13-8Mo |
| Nimonic | 75, 80A, 90, 95, 105, 115, 263 |
| Haynes | 25, 188, 214, 230, 242, 282, 556, HR-120, HR-160 |
| RA Series | RA330, RA333 |
| Precision | 1J22, 1J46, 1J50, 1J79, 1J85, 3J21, 4J32, 4J36, 4J45 |
| High-Strength | 18Ni250, 18Ni300, AerMet 100 |
| Heating | Cr20Ni80, Cr40Ni60 |
| Specialty | Alloy 20, Alloy 59, Inconel 686, 602CA |
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
