1.4057, X17CrNi16-2, AISI 431, SUS431, Martensitic

1.4057, X17CrNi16-2, AISI 431, SUS431, Martensitic Steel
STEELMAX Steel Story

1.4057 은, 12% Chromium 합금, 마르텐자이트계
스테인레스강입니다.

다른 마르텐자이트계 스테인레스강으로는 내식성이
부족하다 거나, 인성 (Toughness)이 충분치 않을 때 선정 사용합니다.

다른 12% 크롬 합금과 , Nickel 합금이 없는 마르텐자이트보다
1.4057 은 16% 크롬 합금에, Nickel 2% 합금입니다

높은 크롬의 합금은 내식성을 높여주고
Nickel은 인성과 내식성 향상 원소입니다.

AISI 431, SUS 431 과 비교 가능하며
Round-bar, Rod로만 공급되는 제품 특성입니다.

QT(Quenching and Tempering), AT(Annealed and Tempered)
열처리 공급되며, Shafts, Piston rods, Swage block (형틀),

Paper working, Pump and valve parts 로 사용되고
비중 7.7, 자성을 가집니다.

1.4507/X17CrNi16-2/1C, 1E, 1X, 1G and 2D, Density 7.7
Chemical composition (%)	Carbon (C)	0.12~0.22
	Silicon (Si)	1.00 max
	Manganese (Mn)	1.50 max
	Phosphorus (P)	0.040 max
	Sulfur (S)	0.030 max
	Chromium (Cr)	15.0~17.0
	Nickel (Ni)	1.50~2.50
0.2% proof strength (MPa, min)	+QT 800	600
0.2% proof strength (MPa, min)	+QT 900	700
Tensile strength (MPa, min)	+A	950 max
	+QT 800	800~950
	+QT 900	800~950
Elongation (+QT800)	D≤60	14
Elongation (+QT800)	60＜D≤160	12
Elongation (+QT900)	D≤60	12
Elongation (+QT900)	60＜D≤160	10
Impact energy(J.min/long.) +QT800	D≤60	25
Impact energy(J.min/long.) +QT800	60＜D≤160	20
Impact energy(J,min/long.) +QT900	D≤60	16
Impact energy(J,min/long.) +QT900	60＜D≤160	15
Hardness (HBW, max)	+A	295
+A : Annealed, +QT : Quenched and Tempered
+AT Minimum 0.2% proof strength Mpa at a elevated temperature	100 ℃	450
	150 ℃	420
	200 ℃	400
	250 ℃	380
+ AT : solution annealed

※ Solution annealing (용체화 어닐링 (풀림)
Heat treatment applied to austenitic steels, consisting of heating to a
high temperature followed by cooling sufficiently rapidly to preserve
a homogeneous austenitic structure on return to ambient temperature.
오스테나이트 강을 고온으로 가열한 후, 빠르게 냉각함으로서
상온에서도 오스테나이트 조직이 되도록 하는 열처리를 말합니다.

※ Annealing
Heat treatment consisting of heating and soaking at a suitable
temperature followed by cooling under conditions such that,
after return to ambient temperature, the metal will be in
a structural state closer to that of equilibrium.
Annealing is a heat treatment process to transform the steel
structure in to a more homogeneous, soft or more suitable state
Note : Since this definition is very general, it is advisable to use an
expression specifying the aim of the treatment (see bright annealing,
full annealing, soft annealing, inter-critical annealing, isothermal
annealing and subcritical annealing).

금속 재료를 적당한 온도로 가열하고, 그 온도에서 유지하는 균질화 처리를
한 뒤, 냉각함으로써 냉각 후 상온에서의 조직이 평형 상태에
가깝도록 하는 열처리.
이 용어는 아주 광범위하게 사용되므로 처리하는 목적을 덧붙여
사용하는 것이 바람직하다. 예를 들어 광휘 어닐링, 완전 어닐링,
연화 어닐링, 중간 어닐링, 등온 어닐링, 변태점 이하 어닐링)

Mechanical Properties for Bright Bar (2H, 2B, 2G or 2P)
Diameter	Annealed		Quenched and Tempered (+QT800)
Diameter	Rm MPa max	HB. Max	Rp0.2 MPa, max	Rm MPa, max	El.(%,min, long.)	CVN,J, min,long.
≤10	1050	330	750	850~1100	7	–
10＜t ≤16	1050	330	700	850~1100	7	–
16＜t ≤40	1000	310	650	800~1050	9	25
40＜t ≤63	950	295	650	800~1000	12	25
63＜t ≤160	950	295	650	800~950	12	16
Rm : Tensile Strength, Rp0.2 : 0.2% Yield strength, Long.: Longitudinal

Type of surface finish of rods and wires, bars and sections.

※ Hot formed

1C : Covered with scale(spot ground if necessary). Not free of surface defects.
EN 10017. EN 10058. EN 10059. EN 10060. EN 10061.
1E : Largely free of scale(but some black spots may remain).
Not free of surface defects. ISO 286-1
1X : Free of scale(but some marks left from machining may remain).
Not free of surface defects. ISO 286-1
1G : Appearance bright. but not uniform. Free of surface defects. ISO 286-1

※ Cold processed

2D : Smooth and matt or bright. Not free of surface defects.
(Unless otherwise agreed at the time of order). EN 10278. EN 10218-2
2H : Smooth and matt or bright. Not necessarily polished. Not free of surface defects.
(Unless otherwise agreed at the time of order). EN 10278. EN 10218-2
2B : Smooth, uniform and bright. Free of surface defects. EN10278
2G : Smooth uniform and bright. Free of surface defects. EN10278
2P : Smoother and brighter than finish 2B or 2G. Free of surface defects. EN10278