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Cobalt-based alloys
Typical chemical composition* (in wt.-%) of pure weld metal
| DUROLOY® | C | Si | Mn | Cr | Ni | Mo | W | Co | Fe | + | Hardness | Applications | Features | Classification |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DUROLIT 1 | 2,4 | 0,7 | 0,4 | 28 | - | - | 11,5 | Rest | <4 | - | 55 HRC 600 °C: 44 HRC 800 °C: 34 HRC | Repair of forging dies. | Austenitic weld metal with large number of embedded carbides. Very hard, heat resistant, extremely abrasion resistant, corrosion resistant, especially against reducing acids and scale resistant up to approx. 1,000 °C. | DIN EN 14700: T Co3 / DIN 8555: MF 20-55-CGTZ |
| DUROLIT 6 | 1,1 | 1,2 | 0,7 | 29 | - | - | 4,5 | Rest | <4 | - | 40-43 HRC 300 °C: 35 HRC 600 °C: 29 HRC | Steam valves, hot shear blades, high temperature liquid pumps, internal combustion engine valves such as marine diesel, etc. | Tough cobalt-based alloy of austenitic-ledeburitic structure with intercalated Cr and W carbides, machinable. Resists high abrasion and corrosive attack. Impact and thermal shock resistant. | DIN EN 14700: T Co2 / DIN 8555: MF 20-45-CTZ |
| DUROLIT 6 LC | 0,9 | 1,2 | 0,7 | 29 | - | - | 4,5 | Rest | <4 | - | 36-39 HRC | Steam valves, hot shear blades, high temperature liquid pumps, etc. | Austenitic weld metal with intercalated Cr and W carbides. Resists high abrasion, corrosive attack, hard knocks. Resistant to thermal shock. High toughness. | DIN EN 14700: T Co2 / DIN 8555: MF 20-40-CTZ |
| DUROLIT 6 HC | 1,3 | 1,2 | 0,7 | 29 | - | - | 4,5 | Rest | <4 | - | 43-46 HRC | Hot shear blades, steam valves, high temperature liquid pumps, etc. | Austenitic weld metal with intercalated Cr and W carbides. Resists high abrasion and corrosive attack. Impact and thermal shock resistant. | DIN EN 14700: T Co2 / DIN 8555: MF 20-45-CTZ |
| DUROLIT 12 | 1,4 | 1 | 0,8 | 29 | - | - | 8 | Rest | <4 | - | 45-48 HRC 300 °C: 37 HRC 600 °C: 32 HRC | Machining tools of the hardwood, paper and plastics industries, as well as for crushing hammers, valve spindles and earth drills. | Weld metal of austenitic-ledeburitic structure with intercalated Cr and W carbides. Resists high abrasion and corrosive attack. Thermal shock resistant. | DIN EN 14700: T Co3 / DIN 8555: MF 20-50 CTZ |
| DUROLIT 21 | 0,25 | 1 | 0,8 | 28 | 2,5 | 5,5 | - | Rest | <4 | - | 30 HRC Work hardened: 45 HRC | Steam fittings, acid fittings in chemical industry, outlet valves, hot stamping dies. | Tough cobalt-based alloy of austenitic structure. Toughest, most corrosion resistant and high-temperature resistant of the common cobalt hard alloys. Work hardening. | DIN EN 14700: T Co1 / DIN 8555: MF 20-350-CKTZ |
| DUROLIT 21 LC | 0,2 | 1 | 0,8 | 28 | 2,5 | 5,5 | - | Rest | <4 | - | 25-30 HRC/40 HRC* | |||
| DUROLIT 25 | 0,1 | 1 | 0,5 | 20 | 10 | - | 14,5 | Rest | <4 | - | 250-280 HB | Pumps, chemical industry, hot shear blades, valves. | Weld metal of austenitic structure. Very good machinability. Resistant to corrosion, impact, wear as well as extreme thermal shocks. | DIN EN 14700: T Z Co1 / DIN 8555: MF 20-300-CKTZ |
| DUROLIT 712 | 1,8 | 0,5 | 0,5 | 29 | <3 | 9 | - | Rest | - | - | 418 HRC | Conveyor and extrusion screws, rock bits, wear rings, impellers | Corrosion resistant in reducing acids High wear resistance | DIN EN 14700: T Z Co1 / DIN 8555: MF 20-300-CKTZ |
*Stellite is a registered trademark of Kennametal Stellite Company
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Nickel base (Ni)
Nickel base (Ni)
The main field of application is armoring of hammer saddles, hot shear blades, stretching inserts.
About the product
DURUM - Made in GERMANY
We manufacture our wear protection solutions for you exclusively in Germany.
