Реферат

This specification covers hot- and cold-worked precipitation-hardenable nickel alloy rod, bar, forgings, and forging stock for high-temperature service. Chemical analysis shall be performed on the alloy and shall conform to the chemical composition requirement in carbon, manganese, silicon, phosphorus, sulfur, chromium, cobalt, molybdenum, columbium, tantalum, titanium, aluminum, zirconium, boron, iron, copper, and nickel. The material shall follow recommended annealing treatment, solution treatment, stabilizing treatment, and precipitation hardening treatment. Tension testing, hardness testing and stress-rupture testing shall be performed on the material and shall comply to the required tensile strength, yield strength, elongation, reduction in area, and Brinell hardness.

Область применения

1.1 This specification covers hot- and cold-worked precipitation-hardenable nickel alloy rod, bar, forgings, and forging stock for moderate or high temperature service (Table 1).

1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.

TABLE 1 Chemical Requirements

ElementComposition Limits, % UNS N07022UNS N07208UNS N07252
(Formerly
Grade 689)UNS N07001
(Formerly
Grade 685)UNS N07500
(Formerly
Grade 684)UNS N07750
(Formerly
Grade 688)UNS N07718
(Formerly
Grade 718) Carbon0.010 max0.04–0.080.10–0.200.03–0.100.15 max0.08 max0.08 max Manganese0.5 max0.3 max0.50 max1.00 max0.75 max1.00 max0.35 max Silicon0.08 max0.15 max0.50 max0.75 max0.75 max0.50 max0.35 max Phosphorus0.025 max0.015 max0.015 max0.030 max0.015 max...0.015 max Sulfur0.015 max0.015 max0.015 max0.030 max0.015 max0.01 max0.015 max Chromium20.0–21.418.5–20.518.00–20.0018.00–21.0015.00–20.0014.00–17.0017.0–21.0 Cobalt1.0 max9.0–11.09.00–11.0012.00–15.0013.00–20.001.00 max^A1.0 max^A Molybdenum15.5–17.48.0–9.09.00–10.503.50–5.003.00–5.00...2.80–3.30 Columbium
(Nb) + tantalum...............0.70–1.204.75–5.50 Titanium...1.90–2.302.25–2.752.75–3.252.50–3.252.25–2.750.65–1.15 Aluminum0.5 max1.38–1.650.75–1.251.20–1.602.50–3.250.40–1.000.20–0.80 Zirconium...0.020 max...0.02–0.12......... Boron0.006 max0.003–0.0100.003–0.010.003–0.010.003–0.01...0.006 max Iron1.8 max1.5 max5.00 max2.00 max4.00 max5.00–9.00remainder^B Copper0.5 max0.1 max...0.50 max0.15 max0.50 max0.30 max Nickelremainder^Bremainder^Bremainder^Bremainder^Bremainder^B70.00 min50.0–55.0 Tantalum0.2 max0.1 max............... Columbium (Niobium)...0.2 max............... Tungsten0.8 max0.5 max............... UNS N07080
(Formerly
Grade 80A)UNS N07752UNS N09925UNS N07725 Carbon0.10 max0.020–0.0600.03 max0.03 max Manganese1.00 max1.00 max1.0 max0.35 max Silicon1.00 max0.50 max0.5 max0.20 max Phosphorus ...0.008 max0.03 max0.015 max Sulfur0.015 max0.003 max0.03 max0.010 max Chromium18.00–21.0014.50–17.0019.5–22.5†19.00–22.50† Cobalt...0.050 max...... Molybdenum......2.5–3.57.00–9.50 Columbium
(Nb) + tantalum...0.70–1.200.5 max (Nb only)2.75–4.00 Titanium1.80–2.702.25–2.751.9–2.401.00–1.70 Aluminum0.50–1.800.40–1.000.1–0.50.35 max Boron...0.007 max...... Iron3.00 max5.00–9.0022.0 minremainder^B Copper...0.50 max1.5–3.0... Zirconium...0.050 max...... Vanadium...70.0 min...... Nickelremainder^B70.0 min42.0–46.055.0–59.0

^A If determined.

^B The element shall be determined arithmetically by difference.

† Chromium content was corrected editorially.