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发表于 2009-3-27 12:31:38
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来自： LAN
AISI 4140. _+ ^4 i5 {1 c
Category Steel 1 P; f5 i0 d( D" h) h* C2 j& b
Class Alloy steel
( [* H% u7 A+ [/ D; s; Y2 }Type Standard ( y' T4 E5 M8 v5 g8 @* V9 {
Common Names Chromium-molybdenum steel
6 ?, A% g3 U, Q+ yDesignations France: AFNOR 40 CD 4 , AFNOR 42 CD 4
4 o( U" F% a) {& J7 eGermany: DIN 1.7225
; E6 U# K5 e2 p z& _$ aItaly: UNI 38 CrMo 4 KB , UNI 40 CrMo 4 , UNI G 4O CrMo 4
& P5 g2 a: }8 }- X6 rJapan: JIS SCM 4 , JIS SCM 4 H
7 ^7 b4 [' V5 d) \8 PSweden: SS 2244
6 T! @ T, l2 W9 h+ k: M1 FUnited Kingdom: B.S. 708 A 42 , B.S. 708 M 40 , B.S. 709 M 40 " u: A. m- P% l5 {& `# }
United States: AMS 6378 , AMS 6379 , AMS 6381B , AMS 6382 , AMS 6382G , AMS 6390 , AMS 6390A , AMS 6395 , ASTM A322 , ASTM A331 , ASTM A505 , ASTM A519 , ASTM A547 , ASTM A646 , MIL SPEC MIL-S-16974 , SAE J404 , SAE J412 , SAE J770 , UNS G41400 ( L! ^& v$ o' _2 \% A# {5 I( r
Element Weight %
$ L- @$ ~, n% R5 f# j5 @, XC 0.38-0.43 ' D1 H2 m- k* d+ o0 t V
Mn 0.75-1.00 - b: \. L) S; h7 Q* H) E; S! f! t
P 0.035 (max) $ |4 f' T. X3 F6 l" z& ~$ T' c* `
S 0.04 (max) * X( p1 @# }! Q- c
Si 0.15-0.30
7 U. \( j/ e$ ?1 A3 gCr 0.80-1.10
; B3 u7 v2 F2 Q- P) J/ LMo 0.15-0.25 ( O, W- _" N, {$ p
Mechanical Properties" w( U( ?+ C% s/ y9 ?, o" z
, P) _; r; V! U
Density (×1000 kg/m3) 7.7-8.03 ( m2 t; Y* g F# v5 ?
Poisson's Ratio 0.27-0.30" B- A% t1 p' g" d; M9 P
Elastic Modulus (GPa) 190-210) S" m; P1 b! M0 I' { [
Tensile Strength (Mpa) 655.0 annealed at 815°C Yield Strength (Mpa) 417.1 2 y5 c( i( ~" f/ i6 q4 {
Elongation (%) 25.7 ) i5 w+ f5 s) Z6 S8 S( z- h
Reduction in Area (%) 56.9
n0 _% d; s0 T9 n$ \/ U- VHardness (HB) 197 annealed at 815°C more ' Q( b& a+ j1 n
Impact Strength (J)$ h+ X; V/ X% Y2 E" R, O- ~ i# v3 d
(Izod) 54.5
8 @3 y3 Y' o5 y; |Thermal Properties
6 l; r, K$ Y! c- J$ RThermal Expansion (10-6/ºC) 12.3 hardened, tempered 600°C + {% M7 B8 h$ |6 `% N% c
Thermal Conductivity (W/m-K) 42.7* O0 w* L! ^% Q0 C5 `
Specific Heat (J/kg-K) 473
8 m1 X7 S: {) k$ u9 Y eElectric Properties
; k0 ^3 r" {3 FElectric Resistivity (10-9W-m) 222 |
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