|
|
发表于 2009-3-27 12:31:38
|
显示全部楼层
来自： LAN
AISI 4140
+ S6 W$ B7 @# i3 ?# `9 Y' }Category Steel , t5 r# E* b$ S9 @
Class Alloy steel
% ]+ M! n+ S8 g7 R }Type Standard , v: ], z! W* I9 E" R; ^
Common Names Chromium-molybdenum steel
- i" }) R6 W. ?2 v4 q6 O1 R2 FDesignations France: AFNOR 40 CD 4 , AFNOR 42 CD 4
1 G- _3 ^5 j! Q8 f$ D+ ]Germany: DIN 1.7225
H$ c# W8 n* ?1 d* RItaly: UNI 38 CrMo 4 KB , UNI 40 CrMo 4 , UNI G 4O CrMo 4 7 _+ u( @( ~5 n1 |' U
Japan: JIS SCM 4 , JIS SCM 4 H
, ]+ v2 z5 ^8 f6 R7 _Sweden: SS 2244
* r# |) ]3 e3 s: ?. lUnited Kingdom: B.S. 708 A 42 , B.S. 708 M 40 , B.S. 709 M 40 7 W, x4 U v6 w5 ?$ k4 x- P
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
9 G" e6 S6 I0 e# `; mElement Weight % + \2 Y) z V5 Y" q/ _3 W' C$ X
C 0.38-0.43
2 C8 L; `. G3 ]Mn 0.75-1.00
5 j: U& `6 H0 J, IP 0.035 (max) & B! `) Y0 e! i+ H# n! W9 `
S 0.04 (max)
5 | E5 E, |3 M: r3 Q/ e" ]# zSi 0.15-0.30 8 n/ ?! N8 u7 e/ h
Cr 0.80-1.10
, R4 M& Y* g# D% d# G4 Q7 XMo 0.15-0.25 , r4 D7 ~+ d. e# |4 W6 k
Mechanical Properties2 g" d+ @+ F% L; N# X% c
! v& n# B2 Z) Q# v( RDensity (×1000 kg/m3) 7.7-8.03 2 [# X$ C& |- S) M _
Poisson's Ratio 0.27-0.300 K+ M( O7 @3 X
Elastic Modulus (GPa) 190-210+ C1 o' K/ C0 o' B
Tensile Strength (Mpa) 655.0 annealed at 815°C Yield Strength (Mpa) 417.1
: N4 b0 T& O( d8 V! pElongation (%) 25.7 ; U. ^, M! x5 c( K
Reduction in Area (%) 56.9
* n* z9 g( @& N; b* [Hardness (HB) 197 annealed at 815°C more
3 n" O# d* ?/ p Z3 K" O0 gImpact Strength (J)' m: b0 Z; ^$ A: d% K# W5 V8 Q% B5 S
(Izod) 54.5 ) I5 I8 |, H# y7 p# Q1 p7 t8 \
Thermal Properties
$ S/ L6 { ]1 r# _" _) ?4 c% U& ZThermal Expansion (10-6/ºC) 12.3 hardened, tempered 600°C
, r* v0 m! { m' r! y# s/ M( IThermal Conductivity (W/m-K) 42.7" ]% b! Z# W2 Q1 H
Specific Heat (J/kg-K) 473 3 T S+ @: }$ n ?6 X7 I7 G. \9 E
Electric Properties
4 K/ D- C- o* g8 D9 j q' PElectric Resistivity (10-9W-m) 222 |
|
