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发表于 2009-3-27 12:31:38
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来自： LAN
AISI 4140
# k. s D5 R t8 O! DCategory Steel
' I/ f% d6 q3 O# e7 ^Class Alloy steel
# E3 D6 X# z3 P4 a4 j; TType Standard % E* o* V. l6 _3 V$ d( Q
Common Names Chromium-molybdenum steel
$ x8 E5 j Y' W& X, |4 w, WDesignations France: AFNOR 40 CD 4 , AFNOR 42 CD 4 + g4 D* H/ r3 y- B
Germany: DIN 1.7225 : B1 e b$ E9 l
Italy: UNI 38 CrMo 4 KB , UNI 40 CrMo 4 , UNI G 4O CrMo 4 * w0 d$ y" O) O+ N- v" O
Japan: JIS SCM 4 , JIS SCM 4 H / z1 N" s0 H% P: i# q6 S
Sweden: SS 2244
- [. D; U5 z4 {2 d& @! }& rUnited Kingdom: B.S. 708 A 42 , B.S. 708 M 40 , B.S. 709 M 40 + W' t& W: \# m1 A+ V: Z# {
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 1 j# |7 ~$ r: j
Element Weight % " O/ ]0 m" S. g9 M5 c9 x+ O% t
C 0.38-0.43 ' I. ?3 v: j) x4 P
Mn 0.75-1.00
" ~0 {# Y$ r6 Y+ [P 0.035 (max) 1 D6 s# ^6 O% O9 n' E0 Q& k
S 0.04 (max)
; d. T" f8 O3 d( V) ~2 KSi 0.15-0.30
3 @2 o) h+ \8 U, x. h: p9 [Cr 0.80-1.10
. D7 W' D) e* r k( i4 l- GMo 0.15-0.25 7 Z& \/ |0 n0 a2 S) v+ H
Mechanical Properties2 _& P. {) Y- u& n- j
. V E& t8 w& E+ {Density (×1000 kg/m3) 7.7-8.03
9 `( Z) y0 v1 _( R8 ]Poisson's Ratio 0.27-0.30
" a& y7 @2 Q/ y% c6 O/ CElastic Modulus (GPa) 190-210
) H4 P3 S t& o2 \4 c9 V* M tTensile Strength (Mpa) 655.0 annealed at 815°C Yield Strength (Mpa) 417.1 1 P# s( l5 \* j/ |
Elongation (%) 25.7 , S+ `- q& T; L5 l$ L
Reduction in Area (%) 56.9
* ?0 Z* f3 q$ h+ }Hardness (HB) 197 annealed at 815°C more
) ~8 c" K! o5 t2 cImpact Strength (J)% r; R0 K- y2 ]* Y' M5 ?& u2 O
(Izod) 54.5
/ [2 n0 x" ]; `6 A6 X" |2 \5 L, {Thermal Properties
. J5 o; w% r2 }" FThermal Expansion (10-6/ºC) 12.3 hardened, tempered 600°C
8 q$ `5 v9 h2 g3 [3 r" I' x* q, Q& |Thermal Conductivity (W/m-K) 42.7$ ]/ w& L( C# e# A
Specific Heat (J/kg-K) 473
! M, u; f9 Q* w2 [& uElectric Properties
* E1 p! q: [& ?+ d {$ UElectric Resistivity (10-9W-m) 222 |
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