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发表于 2009-3-27 12:31:38
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来自： LAN
AISI 4140
) j/ r1 j0 ?3 O; q& p- i) eCategory Steel
; ] {6 ~+ N: t+ R$ d9 ~9 KClass Alloy steel
2 p. n: f9 E9 @" o yType Standard 5 q- w$ r( C' j" N, e) }( V3 Z
Common Names Chromium-molybdenum steel 4 w9 b& r1 X4 r2 g% l7 E5 |
Designations France: AFNOR 40 CD 4 , AFNOR 42 CD 4
], w4 K q2 k# @: C' s( rGermany: DIN 1.7225 5 t: U6 _: s: a8 j3 w8 r# ^8 H& a, c$ T
Italy: UNI 38 CrMo 4 KB , UNI 40 CrMo 4 , UNI G 4O CrMo 4 0 R. a% ], ]1 _5 _
Japan: JIS SCM 4 , JIS SCM 4 H 0 w' ~. L) ]% ?: _. r, q
Sweden: SS 2244
! r! D9 z# |* A. N7 L$ DUnited Kingdom: B.S. 708 A 42 , B.S. 708 M 40 , B.S. 709 M 40
6 K9 w- X. {2 }' \# v( rUnited 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 & A3 k* Y) {+ R! ?7 F% A2 x
Element Weight %
# O/ K( K/ v" L% n4 |5 S. f# ^C 0.38-0.43 % ~2 P4 f' Y! w0 g# P2 K3 e
Mn 0.75-1.00 0 Y. ?) V y0 ?* a0 J5 G
P 0.035 (max)
6 O/ W7 R$ \/ ` V5 f5 ], d5 q& R8 SS 0.04 (max)
, g% S4 c- y( H3 D' F, tSi 0.15-0.30
% I0 Q8 U" a5 j/ b( w' l" r/ VCr 0.80-1.10 ( h0 G1 w/ u3 F: R8 b) L# b
Mo 0.15-0.25
) O; j0 ^0 Z; [7 d3 _3 }% ~4 oMechanical Properties4 ^ x$ ^8 \4 D$ l+ e; a5 _
5 M4 z& x! w/ C: h8 hDensity (×1000 kg/m3) 7.7-8.03
" l( ~- |/ X+ r( @' G2 fPoisson's Ratio 0.27-0.30
4 \9 w/ r3 _( LElastic Modulus (GPa) 190-2108 ^' y6 I0 e/ M9 `
Tensile Strength (Mpa) 655.0 annealed at 815°C Yield Strength (Mpa) 417.1 - Z: d v$ ]5 B5 e9 u, k4 z
Elongation (%) 25.7
& ]+ l# n+ t( a8 ~# h+ uReduction in Area (%) 56.9 $ G: j, X* E( z- U4 H
Hardness (HB) 197 annealed at 815°C more % J2 f" M1 X% d# `
Impact Strength (J)
N3 z2 m! o; ^. F5 e1 A(Izod) 54.5
4 @+ u2 W9 N+ W. c6 kThermal Properties+ N1 n$ j) N% P3 }) E
Thermal Expansion (10-6/ºC) 12.3 hardened, tempered 600°C
r# G- m8 b v6 [Thermal Conductivity (W/m-K) 42.7
1 w5 ~+ w- s; NSpecific Heat (J/kg-K) 473
# K% f4 E' L6 Z. W" B5 ?. S0 fElectric Properties
0 H- a* O" y3 U+ pElectric Resistivity (10-9W-m) 222 |
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