求助：美国4340的材质能不能淬火达到硬度HRC58-60

haiyang

求助各位斑竹，谁能告诉我4340的材质能不能淬火达到HRC58-60

20MnCr5的材质是不是也可以淬火后的硬度达到HRC58-60

急！！！！！！！！！

先在这里谢谢里

sun jiabng

Material Number
~1.6565

1 |6 K6 o; p& m/ X, O* E  xSteel group
3 i( |5 J4 ~3 c1 xStructural and constructional steels

( R% i; j6 H: r* v, R& XSymbol
40CrNiMoA; A50403

Standards
( f& m+ r2 O1 m" s* X* T* \GB T 3078 (1994)
8 Z7 V2 v; b) c! }Quality structural steel cold drawn bars

& R! C7 T5 ^9 f# a' F5 L
Material Number
% q. `6 J8 @/ J8 }2 K~1.6511; ~1.6565; ~1.6580; ~1.6582

Steel group
: H2 |7 e4 o  |6 W* W# XStructural and constructional steels

Symbol
- v. |( A# M& H* m8 k/ A! x% m. R4340 (SAE); G43400 (UNS); A 29 (4340) (ASTM); A 320 (L43)(4340) (ASTM); A 322 (4340) (ASTM); A 331 (4340) (ASTM); A 506 (4340) (ASTM); A 519 (4340) (ASTM); A 574 (4340) (ASTM); A 646 (7)(4340) (ASTM); A 711 (4340) (ASTM); A 752 (4340) (ASTM); A 829 (4340) (ASTM); 6359F (AMS); 6409B (AMS); 6414H (AMS); 6415P (AMS); 6454C (AMS); 6484B (AMS); MIL-S-5000 (MIL)
* v1 ]- T- G/ |! M: j+ h
8 A/ a0 w: {5 c7 J6 {1 A" }+ WStandards
7 d  f2 _. `2 y6 s$ ^5 }. eASTM A 29-99
Steel bars, carbon and alloy, hot-wrought and cold-finished
. G8 V/ l. m' o# {/ b: R
' O1 B+ X. A, \9 ~% |( qASTM A 320-02
! ^# A0 [3 ]/ m) S- g" w* xAlloy steel bolting materials for low-temperature service

* Y7 d5 E! V; I: |2 a: \1 E, `ASTM A 322-01
; E' [) z6 d: Q) j4 }* X4 qSteel bars, alloy, grades

ASTM A 331-00
Steel bars, alloy, cold-finished
6 q/ y' j) R3 p3 `- B' {% _
( d/ \+ t" \$ Z' OASTM A 506-00
5 g( U' q- F1 C  R7 u) `/ |Steel, sheet and strip, alloy, hot-rolled and cold-rolled, regular quality and structural quality

8 j% v% _0 [: ~; ~% U0 t9 M0 ^  cASTM A 519-96
Seamless carbon and alloy steel mechanical tubing
) h" D" M: f# C! e1 T$ I/ `
4 ]( \' I# r- K& z0 X  `2 R3 IASTM A 574-00
0 d/ S% {' S% c9 _4 ?Alloy steel socket-head cap screws
  l# c5 `) g) \' F8 w
ASTM A 646-99
+ [2 [' c9 m3 B  ZPremium quality alloy steel blooms and billets for aircraft and aerospace forgings
1 o5 r+ D# n) Z" s; a9 m5 f! |. c
9 v8 M' o2 Y; Q$ P4 s& r0 `ASTM A 711-01
Forging stock

ASTM A 752-98
Wire rods and coarse round wire, alloy steel
- @" I' V5 T" F  |( R
0 M3 i/ {; Q* ~2 KASTM A 829-00
Plates, alloy steel, structural quality

6 v% Q" S( M8 z6 CSAE J 404 (2000)
$ ?  J5 v& H" N% TAlloy steels
, |+ v! R4 K: q6 k

haiyang

大虾，您还没明确告诉我呢   美国4340的材质能不能淬火达到硬度HRC58-60
我看到20MnCr5最高能达到41-49HRC

claycao

达不到你要 HRC58-60哦。

lu69

4340淬火后是可以达到HRC58-60，而20MnCr5需渗碳或碳氮共渗后淬火，也可达到HRC58-60

devildoevil

怎么最后还是没有一个确切的答案呢？
1 D/ [: a& o( E& ], u- b: k4150应该可以达到 58-62吧？