N07718特征:

在酸和堿中具有良好的耐腐蝕性，在還原條件下有用。

出色的耐苛性堿直至熔融狀態(tài)。

該材料在酸性、堿性和中性鹽溶液中表現(xiàn)出良好的抵抗力，但在氧化鹽溶液中會發(fā)生嚴重的腐蝕。

在室溫和干燥和氯化氫中耐受所有干燥氣體，可在高達?550C?的溫度下使用。

對無機酸的抵抗力因溫度和濃度以及溶液是否充氣而異。在脫氣酸中耐腐蝕性更好。

幾乎不受?315C?以上顆粒間侵蝕的影響，氯酸鹽必須保持在水平。

ASTM B 670 N07718在某些環(huán)境下更傾向于應力腐蝕開裂。已發(fā)現(xiàn)ASTM B 670 N07718可耐受酸性氣體環(huán)境。ASTM B 670 N07718?合金在高速海水中的低腐蝕率和高強度相結合，特別適用于船舶服務中的離心泵軸。在停滯或緩慢移動的海水中，可能會發(fā)生污垢，隨后會出現(xiàn)點蝕，但這種點蝕在經過相當快速的初始攻擊后會減慢。

?N07718

B 670 N07718?Application:Precipitation-Hardening Nickel Alloy (UNS N07718) Plate, Sheet, and Strip for High-Temperature Service

Chemical composition(mass fraction)(wt.%) of the B 670 N07718

ElementsMin.（≥）Max.（≤）SimilarRemarksC-0.03??Cr17.021.0??Mo2.803.30??Ni50.055.0??Al0.200.60??Nb4.755.50??Fe-Bal??Si-0.35??Mn-0.35??P-0.015??S-0.015??B-0.006??

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Mechanical properties of grade B 670 N07718

Yield

Rp0.2?(MPa)Tensile

Rm?(MPa)Impact

KV (J)Elongation

A?(%)Reduction in cross section on fracture

Z?(%)As-Heat-Treated ConditionHBW344 (≥)263 (≥)434223Solution and Aging, Annealing, Ausaging, Q+T,etc233

Physical properties of grade B 670 N07718

PropertyDensity

kg/dm3Temperature T

°C/FSpecific heat

J / kgKThermal conductivity

W/mKElectric resistance

μΩ·cm695 (≥)765 (≥)221334Solution and Aging, Annealing, Ausaging, Q+T,etcTemp.

°C/°FCreep strain limit

(10000h)

(Rp1,0) N/mm2Creep rupture strength

(10000h)

(Rp1,0) N/mm2---941267819---

B 670 N07718 Range of products

Product typeProductsDimensionProcessesDeliver StatusPlates / SheetsPlates / Sheets0.08-200mm(T)*W*LForging, hot rolling and cold rollingAnnealed, Solution and Aging, Q+T, ACID-WASHED, Shot BlastingSteel BarRound Bar, Flat Bar, Square BarΦ8-1200mm*LForging, hot rolling and cold rolling, CastBlack, Rough Turning, Shot Blasting,Coil / StripSteel Coil /Steel Strip0.03-16.0x1200mmCold-Rolled & Hot-RolledAnnealed, Solution and Aging, Q+T, ACID-WASHED, Shot BlastingPipes / TubesSeamless Pipes/Tubes, Welded Pipes/TubesOD:6-219mm x WT:0.5-20.0mmHot extrusion, Cold Drawn, WeldedAnnealed, Solution and Aging, Q+T, ACID-WASHED