High Elasticity Martensite Stainless Steel Maraging 300 Rod Forging Cold Wire
High Elasticity Martensite Stainless Steel Maraging300 Rod Forging Cold Wire
Introduction
Maraging 300 is a 18% nickel, cobalt strengthened steel (C-type), with excellent mechanical properties, workability and heat treatment characteristics. It is also called 18Ni300.
Applications
Typical applications for maraging include missile and rocket motor cases, landing and takeoff gear, munitions, aerospace, extrusion tooling, die casting, high performance shafting, gears and fasteners.
Chemical compositions of Martensite Stainless Steel Maraging
| grade | C | Mn | Si | P | S | Ni | Co | Mo | Ti | Al | Cr | Cu | Fe |
| 250 | ≤0.03 | ≤0.10 | ≤0.10 | ≤0.010 | ≤0.010 | 17-19 | 7.0-8.5 | 4.6-5.2 | 0.30-0.50 | 0.05-0.15 | ≤0.50 | ≤0.50 | balance |
| 300 | ≤0.03 | ≤0.10 | ≤0.10 | ≤0.010 | ≤0.010 | 18-19 | 8.5-9.5 | 4.6-5.2 | 0.50-0.80 | 0.05-0.15 | ≤0.50 | ≤0.50 | balance |
| 350 | ≤0.03 | ≤0.10 | ≤0.10 | ≤0.010 | ≤0.010 | 18-19 | 11.5-12.5 | 4.6-5.2 | 1.3-1.6 | 0.05-0.15 | ≤0.50 | ≤0.50 | balance |
Thermal treatment
Solid solution temperature is 815~830℃, oil cold or air cold (heating time, salt bath furnace 1min/mm, air furnace 2~2.5min/mm) and the hardness is 28HRC.
The aging temperature of Maraging250 and Maraging300 steel is 480℃ and the holding time of 3h, hardness is 43HRC; holding time of 6h, hardness of 52HRC.
The limitation temperature of Maraging350 steel is 510℃, and the limitation time of 6h, hardness is 57~60HRC.
Production process
The main production processes are smelting, heat processing, cold processing, welding, heat treatment and surface treatment.
Available forms
Rod,forging, cold rolled strip, cold wire
Rod diameter, 6 ~ 300mm, forged / hot rolled + turning
Plate thickness is 0.8 ~ 25mm, hot rolled / cold rolled
Wire diameter of 0.1 ~ 6mm, cold pull
Forgings are according to customer’s requirements.
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