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AISI 688

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AISI 687 UNS N07750
#AISI # #688

Description

USA AISI AISI 688 precipitation hardening and AISI 688 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Steel: AISI 688
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Steel AISI 688 AISI USA precipitation hardening
AISI 681
AISI 682
AISI 683
UNS N07041
AISI 684
UNS N07500
AISI 685
UNS N07001
AISI 686
AISI 687

Chemical composition(mass fraction)(wt.%) of the AISI 688

Cr(％) Ni(％) Al(%) Ti(%) Other(%)
15 73 0.80 2.50 Fe(％) 0.75,Nb/Ta 0.85

Mechanical Properties of steel grade AISI 688

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV/Ku (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
666 (≥) 684 (≥) 21 12 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 411

Physical Properties of steel grade AISI 688

Temperature
(°C)		 Modulus of elasticity
(GPa)		 Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)		 Specific thermal capacity
(J/kg·°C)		 Specific electrical resistivity
(Ω mm²/m)		 Density
(kg/dm³)		 Poisson’s coefficient, ν
13 - -     0.32 -  
333 419 - 44.3 443   -  
944 - 21 41.2   442 132

Heat Treatment of steel grade AISI 688

Heat treated : 1538°C - 1574°C

Technological Curves of steel grade AISI 688

Cross Reference Table (Equivalent Grade) of AISI 688

Grade Standard Country Application
AISI 431 AISI USA Martensitic special steel
AISI 440A AISI China Martensitic special steel
AISI 440B AISI USA Martensitic special steel
AISI 440F AISI USA Martensitic special steel
AISI 440F Se AISI USA Martensitic special steel
AISI 501 AISI USA Martensitic special steel
AISI 501A AISI USA Martensitic special steel
AISI 501B AISI USA Martensitic special steel
AISI 502 AISI USA Martensitic special steel
AISI 503 AISI USA Martensitic special steel
AISI 504 AISI USA Martensitic special steel
AISI S13800 USA precipitation hardening
AISI S15500 AISI USA precipitation hardening
AISI 632 AISI USA precipitation hardening
AISI 630 AISI USA precipitation hardening
AISI 635 AISI USA precipitation hardening
AISI 631 AISI USA precipitation hardening
AISI 633 AISI USA precipitation hardening
AISI 633 AISI USA precipitation hardening
AISI 634 AISI USA precipitation hardening
AISI 687 UNS N07750
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Jiangyou Longhai Special Steel Co.,Ltd.
Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

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