44SMn28 Bar, EN 10277-3, Cold Drawn Bright Finish

44SMn28 Bar, EN 10277-3, Cold Drawn Bright Finish
STEELMAX Steel Story

44SMn28 재질은 고강도 강재이면서 쾌삭강입니다.
44SMn28 강재는 As Rolled 열간 압연 후, 표면 처리와 열처리에 따라

기계적 성질과 표면 마무리에 차이가 있으며, 각각의 Symbol 이 있습니다.
+SH : As rolled and turned, +C : Cold Drawn

+C+QT : +C (냉간 인발) 후 QT 열처리, +QT+C : QT 열처리 후 냉간 인발 (+C) 입니다.
44SMn28 재질은, 탄소량 Nominal 0.44%, Sulfur (황) nominal 0.28% 합금으로

높은 쾌삭 성능을 발휘토록 설계된 강종이며
QT 열처리성이 좋은 0.44% Carbon 함량의 강재입니다.

44SMn28, EN 10277-3 냉간 압연 쾌삭강재는 JIS SUM43
ASTM A311 Grade 1144 Class B 재질과 비교 가능합니다.

EN 10277-3, 44SMn28 재질은 Bright bar products 이고
EN 10087, 44SMn28 재질은 Hot rolled bars and rods 재질입니다.

※ Cold finished steel bars (마봉강 : 摩棒鋼)
Finishing steel bar with cold drawing, grinding, cutting,
smooth turned, rough turned, centerless, cold rolling
or combination of them to improve the surface
quality and dimension precision
The term “Cold Finish” is an umbrella definition for any
material that has had some sort of surface treatment
There are round, square, hexagon, flat and so on according
to the cross-sectional shape.

강재를 냉간 인발, 연삭, 절삭, 센터리스 또는 이들의 조합으로
마무리한 봉강으로, 봉강 뿐 아니라, 원형, 정방형,
육각형, 장방형 및 이형 등이 있습니다.

※ Turned products (Lathe turning : 旋削 : 선삭 제품) : Symbol +SH (DIN-EN)
Round bars products by turning on a lathe where the products
can be further processed by straightening and polishing.
This operation gives the bar special features with respect to shape,
dimensional accuracy and surface finish.
The removal of metal is carried out in such a way that the bright
product is generally free from rolling defects and surface decarburization.
For technical reasons some bars ordered as hot rolled products may be
delivered roughly turned(peeled), nevertheless such products are
treated as hot rolled products and not as bright products.

※ Mechanical properties (기계적성질 : 機械的性質)
Various properties relating to mechanical deformation and
breaking such as tensile strength, yield point or proof strength,
elongation, reduction of area, hardness, impact value,
fatigue strength, creep strength, etc.
인장강도, 항복점, 연신율, 단면 수축율, 경도, 충격치, 피로 강도,
크리프 강도 등 기계적인 변형 및 파괴에 관계되는 성질을 말합니다.

※ Drawing (인발 : 引拔)
The process of pulling material through a die to reduce the size,
change the cross sectional shape, or to harden the material
소재를 잡아 당겨, 다이를 통과시키면서 단면적이나 크기를
줄여 나가거나, 금속을 경화 시키기도 하는 방법

44SMn28, 1.0762, EN 10277-3, Bright Bar
Chemical composition (%)	Carbon (C)	0.40~0.48
	Silicon (Si)	0.40 max
	Manganese (Mn)	1.30~1.70
	Phosphorus (P)	0.06 max
	Sulfur (S)	0.24~0.33

44SMn28, EN 10277-3	As Rolled +turned (+SH)		Cold Drawn (+C)
44SMn28, EN 10277-3	HB	Tensile strength (N/㎟)	Yield strength (N/㎟	Tensile strength (N/㎟)	Elongation (%)
5≤d≤10	–	–	600 min	760~1030	5 min
10＜d≤16	–	–	530 min	710~980	5 min
16＜d≤40	187~242	630~820	460 min	660~900	6 min
40＜d≤63	184~235	620~790	430 min	650~870	7 min
63＜d≤100	181~231	610~780	390 min	630~840	7 min

44SMn28, EN 10277-3	Cold Drawn +QT (+C+QT)			+QT and Cold Drawn (+QT+C)
44SMn28, EN 10277-3	Yield strength (N/㎟	Tensile strength (N/㎟)	Elongation (%)	Yield strength (N/㎟	Tensile strength (N/㎟)	Elongation (%)
5≤d≤10	–	–	–	595 min	850~1000	9 min
10＜d≤16	–	–	–	595 min	850~1000	9 min
16＜d≤40	420 min	700~850	16 min	490 min	700~900	11 min
40＜d≤63	410 min	700~850	16 min	490 min	700~900	12 min
63＜d≤100	400 min	700~850	16 min	490 min	700~900	12 min