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