ASTM B446 Nickel-Chromium-Molybdenum-Columbium Alloy (UNS N06625), Nickel-Chromium-Molybdenum-Silicon Alloy (UNS N06219), and Nickel-Chromium-Molybdenum-Tungsten Alloy (UNS N06650) Rod and Bar
hot-worked rod and bar and cold-worked rod.
UNS N06625 products are furnished in two grades of different heat-treated conditions:
Grade 1 (Annealed)—Material is normally employed in service temperatures up to 1100°F (593°C).
Grade 2 (Solution Annealed)—Material is normally employed in service temperatures above 1100°F (593°C) when resistance to creep and rupture is required.
Note 1: Hot-working or reannealing may change properties significantly, depending on working history and temperatures.
Alloys UNS N06219 and UNS N06650 are supplied in solution annealed condition only.
Cold-Worked Nickel Alloy Bars - Cold-Worked Nickel Alloy Rods - Hot-Worked Nickel Alloy Bars - Hot-Worked Nickel Alloy Rods - Nickel-Chromium-Molybdenum Alloys - Nickel-Chromium-Molybdenum-Columbium Alloys -
Nickel-Chromium-Molybdenum-Silicon Alloys - Nickel-Chromium-Molybdenum-Tungsten Alloys
Chemical Requirements
Element Composition Limits, %
N06625 N06219 N06650
Carbon 0.10 max 0.05 max 0.03 max
Manganese 0.50 max 0.50 max 0.50 max
Silicon 0.50 max 0.70-1.10 0.50 max
Phosphorus 0.015 max 0.020 max 0.020 max
Sulfur 0.015 max 0.010 max 0.010 max
Chromium 20.0 min 18.0-22.0 19.0-21.0
23.0 max ... ...
Columbium + tantalum 3.15 min ... 0.05-0.50
4.15 max ...
Cobalt (if determined) 1.0 max 1.0 max 1.0 max
Molybdenum 8.0 min 7.0-9.0 9.5-12.5
10.0 max ... ...
Iron 5.0 max 2.0-4.0 12.0-16.0
Aluminum 0.40 max 0.50 max 0.05-0.50
Titanium 0.40 max 0.50 max ...
Copper ... 0.50 max 0.30 max
NickelA 58.0 min Bal. Bal.
Tungsten ... ... 0.50-2.50
Nitrogen ... ... 0.05-0.20
bar; rod; UNS N06625; UNS N06219; UNS N06650
