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发表于 2009-3-27 12:31:38
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来自： LAN
AISI 4140$ b* @& A; K- ?- {( `, w3 B+ n
Category Steel * X- d) p5 ] C7 D6 Q5 H6 N3 B! |, b
Class Alloy steel
( Z% A5 j8 Z7 ^- a/ t9 PType Standard
0 C9 m3 A" s8 k* j# i8 LCommon Names Chromium-molybdenum steel 3 G$ _0 r2 }1 j0 V) N7 z
Designations France: AFNOR 40 CD 4 , AFNOR 42 CD 4
! @5 Z, ]" h) o; i& L1 x% x: uGermany: DIN 1.7225
; v; i& m8 X4 l+ ]Italy: UNI 38 CrMo 4 KB , UNI 40 CrMo 4 , UNI G 4O CrMo 4
8 m" ]! P: u, D6 t6 ~Japan: JIS SCM 4 , JIS SCM 4 H
, m1 g; P9 C3 n7 V& |* @( E' |Sweden: SS 2244 I1 H- z5 |0 U. Z
United Kingdom: B.S. 708 A 42 , B.S. 708 M 40 , B.S. 709 M 40 8 ~/ B& @8 o0 P2 h* ` _
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
' x7 Y, | v& RElement Weight % % q& t% O/ L7 w; e C
C 0.38-0.43
4 L1 K( \) D1 D6 a/ s; vMn 0.75-1.00
) H, h+ |+ ^" D3 U* ]7 RP 0.035 (max)
" U% h& P, S/ N. L3 `/ YS 0.04 (max)
2 G# o/ F5 ~4 G/ C: d4 i5 xSi 0.15-0.30 - [4 D7 p" N8 ?/ y6 h! B! S9 M, g
Cr 0.80-1.10
4 m- i* y5 T6 b! w; c; oMo 0.15-0.25 0 v6 ]% a. j$ a0 t ~/ {+ H' M( ~
Mechanical Properties
; b; n* S# `! i& ~
4 X+ {0 z0 w' [% h, X+ }Density (×1000 kg/m3) 7.7-8.03 - g6 z# Q% V f- u Y8 E
Poisson's Ratio 0.27-0.30
" L& x( w/ p6 AElastic Modulus (GPa) 190-210
% @! J" ?% p$ L& s, q zTensile Strength (Mpa) 655.0 annealed at 815°C Yield Strength (Mpa) 417.1 + S! T. \1 F1 k# W
Elongation (%) 25.7 4 N8 J. {- ~2 T/ w
Reduction in Area (%) 56.9
* }" S* }% O6 x1 eHardness (HB) 197 annealed at 815°C more
& q) y* u$ o9 J( k+ I0 L$ nImpact Strength (J)) b' D7 u4 t8 V. _2 P
(Izod) 54.5 # c, X5 E' V o; D
Thermal Properties
4 @. G5 j% f1 z: c9 i, }$ QThermal Expansion (10-6/ºC) 12.3 hardened, tempered 600°C 1 s' N/ ]4 P& G) I
Thermal Conductivity (W/m-K) 42.7- i8 h! W/ @! k
Specific Heat (J/kg-K) 473
' d9 W+ V0 I* CElectric Properties
; f3 w1 R! \/ x* `4 hElectric Resistivity (10-9W-m) 222 |
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