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发表于 2009-3-27 12:31:38
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来自： LAN
AISI 4140
1 T. c% [5 \- ]Category Steel * s: B, w. b/ b' }! s. E6 `, |
Class Alloy steel 5 V& f/ ^8 u( b4 q$ e9 `
Type Standard
0 s0 E7 s, y J5 R9 P2 `0 x9 L- sCommon Names Chromium-molybdenum steel 7 j \( b% j: d& M0 F
Designations France: AFNOR 40 CD 4 , AFNOR 42 CD 4
. F5 c8 _# _. _5 X6 j/ RGermany: DIN 1.7225
* d( K) t9 @6 |Italy: UNI 38 CrMo 4 KB , UNI 40 CrMo 4 , UNI G 4O CrMo 4 0 S/ u# m' v0 d c5 ~8 M" t
Japan: JIS SCM 4 , JIS SCM 4 H
2 ?$ X. R. J d! V2 L9 fSweden: SS 2244
* {. f5 n( E+ |United Kingdom: B.S. 708 A 42 , B.S. 708 M 40 , B.S. 709 M 40
+ H% r" ~6 Z- o; T% Q# g$ Y' i: c! m3 DUnited 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
1 _, Z8 f- q% b G- L: G/ XElement Weight %
3 t) F7 M6 s1 H% {C 0.38-0.43 % P! y. K5 S' t0 _
Mn 0.75-1.00 + M; P3 U1 ^; H, G
P 0.035 (max) , a' M; F6 P2 N) V" l$ g
S 0.04 (max) ) }, }0 k/ A, t1 i
Si 0.15-0.30 7 q! a Z c$ R- u
Cr 0.80-1.10 4 c( ?' Z j$ o7 m, L% a4 p
Mo 0.15-0.25
& u; M8 E$ y8 C0 K; FMechanical Properties
# j$ G0 H5 d4 M5 Z2 i1 N. K
% }5 g5 _# t9 D' r! bDensity (×1000 kg/m3) 7.7-8.03 " z# X/ T0 s, _/ h5 u7 v; ~
Poisson's Ratio 0.27-0.30
1 K3 P# s% e" i/ B3 ~) ^5 N- [Elastic Modulus (GPa) 190-210
' |2 q! ]5 G% _! G/ N$ T- R! W+ dTensile Strength (Mpa) 655.0 annealed at 815°C Yield Strength (Mpa) 417.1 6 D# r- V; {$ G# B! t: w
Elongation (%) 25.7 9 c! J: O7 _: M& \* b5 e/ e1 w
Reduction in Area (%) 56.9 ' S# z7 H1 n9 c# w" ]
Hardness (HB) 197 annealed at 815°C more ' r O* Z; |' M6 Q) }
Impact Strength (J)
* k4 K3 |" A' q9 B+ S2 O(Izod) 54.5 ; D+ T; G9 \, y0 ?4 F/ B
Thermal Properties
' k- F. R1 e" O9 m# ?Thermal Expansion (10-6/ºC) 12.3 hardened, tempered 600°C : i0 N/ Z! U/ c$ J" O
Thermal Conductivity (W/m-K) 42.7
7 v$ H' c: [: I9 ~6 SSpecific Heat (J/kg-K) 473
8 R* w( u8 o5 @- u" s# Z" bElectric Properties
% y+ ^8 _4 S( E) g- c/ yElectric Resistivity (10-9W-m) 222 |
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