Corrosion-Resistant Steels and Alloys
01
Description
Recently, the company has been actively implementing new technical solutions for gas atomizing, which significantly improve the morphology of particles, reduce the number of satellites, and increase the fluidity of powders and the quality of weld coatings.
Atomized powders produced by JSC POLEMA are classified into two groups: powders for coatings and structural powders.
The first group includes over 200 types of powders for coatings using various methods, including self-fluxing nickel, iron, and copper alloys, tool steels, high-carbon and low-carbon steels and alloys, corrosion-resistant and heat-resistant steels and alloys, as well as tin- and zinc-based composite powders and alloys.
The variety of available powders for coatings, used in high-speed, detonation, gas-flame, and plasma spraying, gas-powder, plasma, induction, and laser welding, allows to solve specific problems of surface hardening and effective protection against wear and corrosion of machines and equipment parts operating under elevated temperatures, high mechanical stress, and with abrasive substances and in aggressive environments.
The second group includes structural powders, such as pressed powders of pure metals (chromium, molybdenum, tungsten, nickel, and titanium), copper-based alloys (bronze and brass), stainless steels, special alloys with high magnetic permeability (permalloys), and materials for shot jet processing of parts (tool steels).
Powders of this group are used for making sheet rolled products, bars, and non-ferrous and refractory metal forgings, tools, sintered and deformed parts, composite materials used in electrical engineering, electronics, tool engineering, machine engineering, aerospace industry, nuclear power engineering, vehicles, filters, gas absorbers, and other engineering areas.
02
specifications
Powders are either gas-atomized (AP), high-pressure water atomized (WAP) or metal oxides are reduced with Ca hydride (R).
Gas-atomized powders are characterized with a spherical shape of particles and can boast good flowability.
Applications include corrosion-resistant and wear-resistant coatings on parts of machines and equipment by plasma and laser welding, gas-dynamic and plasma spraying. The choice of coating material is determined by the purpose of corrosion protection and gaining special surface properties of machine parts and equipment, as well as by applying reinforcing coatings.
For example, powder AP-FeCr19Ni9Si5Mo4NV is used for wear-resistant coatings operating in aggressive environments at elevated temperatures, AP-FeCr19Ni11Mo2 – for antifriction, corrosion-resistant coatings.
Reduced and water-atomized powders have an irregular or rounded particle shape. They are used for production of permeable materials (filters) and corrosion-resistant structural parts.
For example, powder AP-FeCr18Ni9MoCuSi is developed specially for filtration of polyester resin melt.
RP-Cr20Ni80 40-100 micon is also used for plasma coatings in aircraft engine engineering.
A separate group consists of stainless steel powders for surfacing erosion-resistant coatings on parts of shut-off energy valves. These are new powder materials developed specially to replace the electrodes used as surfacing materials in production and repair of valves.
POWDER MATERIALS FOR PRODUCTION AND REPAIR OF ENERGY FITTINGS
Powders of erosion-resistant alloys such as AP-FeCr17Ni8Si6Mn (ЦН-6Л), AP-FeCr18Ni9Mo5Si5Mn4Nb (ЦН-12М) were developed for high-performance and high-quality surfacing of sealing surfaces of fittings of power plant parts to substitute welding electrodes applied in valve industry. The names in brackets show the grades of surfacing electrodes per RF Standard GOST 10051, used for surfacing layers of similar compositions.
New powder surfacing materials were developed in cooperation with the State Research Center of the Russian Federation, OAO NPO CNIITMASH, and are produced in accordance with technical specifications agreed upon with the Institute of Welding and Control of the State Research Center.
The powders have a spherical particle shape and a good flowability.
Hardness of the deposited metal after heat treatment is as below:
--AP-FeCr17Ni8Si6Mn (ЦН-6Л)………………30-39 HRC;
--AP-FeCr18Ni9Mo5Si5Mn4Nb (ЦН-12М)……40-51 HRC.
The surfacing is done with preheating of the parts at 350 °C and subsequent heat treatment after surfacing:
--for austenitic steels - tempering at 860 °C, 2 hours, with slow cooling;
--for carbon steels - tempering at 640 °C, 2 hours, with slow cooling.
Gas-atomized powders are characterized with a spherical shape of particles and can boast good flowability.
Applications include corrosion-resistant and wear-resistant coatings on parts of machines and equipment by plasma and laser welding, gas-dynamic and plasma spraying. The choice of coating material is determined by the purpose of corrosion protection and gaining special surface properties of machine parts and equipment, as well as by applying reinforcing coatings.
For example, powder AP-FeCr19Ni9Si5Mo4NV is used for wear-resistant coatings operating in aggressive environments at elevated temperatures, AP-FeCr19Ni11Mo2 – for antifriction, corrosion-resistant coatings.
Reduced and water-atomized powders have an irregular or rounded particle shape. They are used for production of permeable materials (filters) and corrosion-resistant structural parts.
For example, powder AP-FeCr18Ni9MoCuSi is developed specially for filtration of polyester resin melt.
RP-Cr20Ni80 40-100 micon is also used for plasma coatings in aircraft engine engineering.
A separate group consists of stainless steel powders for surfacing erosion-resistant coatings on parts of shut-off energy valves. These are new powder materials developed specially to replace the electrodes used as surfacing materials in production and repair of valves.
POWDER MATERIALS FOR PRODUCTION AND REPAIR OF ENERGY FITTINGS
Powders of erosion-resistant alloys such as AP-FeCr17Ni8Si6Mn (ЦН-6Л), AP-FeCr18Ni9Mo5Si5Mn4Nb (ЦН-12М) were developed for high-performance and high-quality surfacing of sealing surfaces of fittings of power plant parts to substitute welding electrodes applied in valve industry. The names in brackets show the grades of surfacing electrodes per RF Standard GOST 10051, used for surfacing layers of similar compositions.
New powder surfacing materials were developed in cooperation with the State Research Center of the Russian Federation, OAO NPO CNIITMASH, and are produced in accordance with technical specifications agreed upon with the Institute of Welding and Control of the State Research Center.
The powders have a spherical particle shape and a good flowability.
Hardness of the deposited metal after heat treatment is as below:
--AP-FeCr17Ni8Si6Mn (ЦН-6Л)………………30-39 HRC;
--AP-FeCr18Ni9Mo5Si5Mn4Nb (ЦН-12М)……40-51 HRC.
The surfacing is done with preheating of the parts at 350 °C and subsequent heat treatment after surfacing:
--for austenitic steels - tempering at 860 °C, 2 hours, with slow cooling;
--for carbon steels - tempering at 640 °C, 2 hours, with slow cooling.
03
advantages
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Profound production experience
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Strict quality control of all produced materials
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In-house research laboratory
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Flexible discount system
04
Product names
Below are examples of product names:
AP-NiAl5 gas-atomized powder,
Stainless steel AP-FeCr18Ni9 gas-atomized powder,
Stainless steel AP-FeCr18Ni9Ti reduced powder,
Stainless steel AP-FeCr18Ni15 reduced powder,
Stainless steel AP-FeCr17Ni2 reduced powder,
Stainless steel AP-FeCr23Ni18 reduced powder,
Stainless steel AP-FeCr13Mo2 reduced powder,
Nichrome Ni80Cr20 powder:
AP-Cr20Ni80 (Ni-atomized) and
WAP-Cr20Ni80 (water-atomized),
Nichrome AP-Cr20Ni80 reduced powder,
Nichrome AP-Cr40Ni60 reduced powder,
AP-FeCr30 reduced powder,
Stainless steel AP-FeCr17Ni12Mo3 gas-atomized powder,
Stainless steel AP-FeCr19Ni9Si5Mo4NV gas-atomized powder,
Stainless steel AP-FeCr19Ni11Mo2 gas-atomized powder,
Stainless steel AP-FeCr20Ni2 gas-atomized powder,
Stainless steel AP-FeCr13 gas-atomized powder,
Stainless steel AP-FeCr18Ni9MoCuSi water-atomized powder.
You can contact our sales managers for more details at:
export_polema@metholding.com,
tel.: +7(4872)25-06-76.
AP-NiAl5 gas-atomized powder,
Stainless steel AP-FeCr18Ni9 gas-atomized powder,
Stainless steel AP-FeCr18Ni9Ti reduced powder,
Stainless steel AP-FeCr18Ni15 reduced powder,
Stainless steel AP-FeCr17Ni2 reduced powder,
Stainless steel AP-FeCr23Ni18 reduced powder,
Stainless steel AP-FeCr13Mo2 reduced powder,
Nichrome Ni80Cr20 powder:
AP-Cr20Ni80 (Ni-atomized) and
WAP-Cr20Ni80 (water-atomized),
Nichrome AP-Cr20Ni80 reduced powder,
Nichrome AP-Cr40Ni60 reduced powder,
AP-FeCr30 reduced powder,
Stainless steel AP-FeCr17Ni12Mo3 gas-atomized powder,
Stainless steel AP-FeCr19Ni9Si5Mo4NV gas-atomized powder,
Stainless steel AP-FeCr19Ni11Mo2 gas-atomized powder,
Stainless steel AP-FeCr20Ni2 gas-atomized powder,
Stainless steel AP-FeCr13 gas-atomized powder,
Stainless steel AP-FeCr18Ni9MoCuSi water-atomized powder.
You can contact our sales managers for more details at:
export_polema@metholding.com,
tel.: +7(4872)25-06-76.
05
chemical composition
| Name, main cuts | Nominal composition % | ||||||
| Fе | Сr | Ni | Si | Мо | Al | Other | |
|
AP-NiAl5 gas-atomized powder -40, 11-53, 40-100, 40-125, 45-106 micron |
≤1 | - | base | - | - | 5 | С ≤0.1, Si, Fe, Mn ≤1 |
|
Stainless steel AP-FeCr18Ni9 gas-atomized powder -40, 20-63, 40-100, 90-160 micron |
base | 18 | 9 | - | - | - | С ≤0.2 |
|
Stainless steel AP-FeCr18Ni9Ti reduced powder -56* bulk density 2.2-3.0 g/ccm -160* bulk density 2.0-2.6 g/ccm -280* bulk density 1.7-2.6 g/ccm |
base | 18 | 9 | - | - | - | С ≤0.08 Ti 0.8 О ≤0.35 S ≤0.02 Са ≤0.15 |
|
Stainless steel AP-FeCr18Ni15 reduced powder -56 bulk density 1.9-2.5 g/ccm -160 bulk density 1.8-2.5 (3.0) g/ccm -280 bulk density 1.7-2.5 g/ccm |
base | 18 | 15 | - | - | - | С ≤0.08 О ≤0.30 S ≤0.015 Са ≤0.15 |
|
Stainless steel AP-FeCr17Ni2 reduced powder -56 bulk density 2.2-3.0 g/ccm -160 bulk density 2.0-2.6 g/ccm -280 bulk density 1.7-2.6 g/ccm |
base | 17 | 2 | - | - | - | О ≤0.35 S ≤0.02 Са ≤0.2 |
|
Stainless steel AP-FeCr23Ni18 reduced powder -56 bulk density 2.2-3.0 g/ccm -160 bulk density 2.0-2.6 g/ccm -280 bulk density 1.7-2.6 g/ccm |
base | 23 | 18 | - | - | - | С ≤0.08 О ≤0.3 S ≤0.02 Са ≤0.15 |
|
Stainless steel AP-FeCr13Mo2 reduced powder |
base | 13 | - | - | 2 | - | С ≤0.08 О ≤0.5 S ≤0.02 Са ≤0.2 |
|
Nichrome Ni80Cr20 powder: --AP-Cr20Ni80 (Ni-atomized) --WAP-Cr20Ni80 (water-atomized) -40, 20-63, 40-100, 80-160 micron |
≤1 | 20.5 | base | - | - | - | С, Mn ≤0.1 Si ≤0.5, О ≤0.05 |
|
Nichrome AP-Cr20Ni80 reduced powder -160 bulk density 2,0-2,6 g/ccm -280 bulk density 1.7-2.6 g/ccm |
- | 20 | base | - | - | - | С ≤0.06 О ≤0.3 S ≤0.01 Са ≤0.2 |
| Nichrome AP-Cr40Ni60 reduced powder | - | 40 | base | - | - | - | С ≤0.06 S ≤0.02 Са ≤0.2 |
|
AP-FeCr30 reduced powder -56 bulk density 2.2-3.0 g/ccm -160 bulk density 2.0-2.6 g/ccm -280 bulk density 1.7-2.6 g/ccm |
base | 30 | ≤0.3 | С ≤0.3 О ≤0.3 S ≤0.01 Са ≤0.2 | |||
|
Stainless steel AP-FeCr17Ni12Mo3 gas-atomized powder 11-53, 45-106 micron |
base | 17 | 12 | - | 2.5 | <0.6 | Mn 0.8 С ≤0.1 |
|
Stainless steel AP-FeCr19Ni9Si5Mo4NV gas-atomized powder 80-200 micron |
base | 19 | 9 | - | - | - | N, Si, Мn, V, Si, Мn, Nb, С ≤0.08 |
|
Stainless steel AP-FeCr19Ni11Mo2 gas-atomized powder -40, 40-100, 80-400, 100-280 micron |
base | 19 | 11 | - | 2.5 | - | С ≤0.08 О ≤0.05 Мn1.5 |
|
Stainless steel AP-FeCr20Ni2 gas-atomized powder -40, 20-63, 40-100, 80-200 micron |
base | 13 | 2.2 | - | - | - | Мn 0.8 С 0.2 Si 0.8 С 0.3 |
|
Stainless steel AP-FeCr13 gas-atomized powder -40, 20-63, 40-100, 80-200 micron |
base | 13 | - | - | - | - | Мn 0.8 С 0.2 Si 0.8 С 0.3 |
|
Stainless steel AP-FeCr18Ni9MoCuSi water-atomized powder 630-2000, 630-2500 micron |
base | 18 | 9.5 | 0.8 | 0.9 | - | Cu 0.9 С ≤0.12 О ≤0.45 |
Powder Materials for Production and Repair of Energy Fittings:
| Name, main cuts | Nominal composition, % | ||||||
| Fе | Сr | Ni | Si | Мо | Al | Others | |
|
AP-FeCr17Ni8Si6Mn (ЦН-6Л) gas-atomized powder 63-125 micron |
base | 17 | 8 | 6 | - | - | С0.08 Mn1 Co≤0.2 S≤0.025 P≤0.03 O≤0.08 N≤0.09 |
|
AP-FeCr18Ni9Mo5Si5Mn4Nb (ЦН-12М) gas-atomized powder 63-125 micron |
base | 18 | 9 | 5 | 5 | - | С0.1 Mn4 Nb1 Co≤0.2 S≤0.025 P≤0.03 O≤0.08 N≤0.09 |
06
miscellaneous
If required by customers, powders are made with other particle sizes.
07
Application areas