P275NL1, P275NL2 EN10028-3 Normalizing Plate

P275NL1, P275NL2 EN10028-3 Normalizing Plate
STEELMAX Steel Story

EN규격에 나타나는 강종입니다.
DIN EN 10028-3 에 나타나며

Fine-grain 조직을 가지는
압력 용기용 구조용강으로

LPG, Butane ane Propane Tank 제작,
스팀 보일러, 압력 용기에 사용되는 강종입니다.

P275NL1 , P275NL2 의
사용 온도 환경은 -20℃ 아래에서 사용합니다.

이 강재의 또 다른 성격은
좋은 용접성과 크랙 저항성으로 특징 지어집니다.

EN 규격 중 EN 10028-Part 3 은
Flat products made of steels for pressure purposes이며

Weldable fine grain steels, normalized 로
Normalizing 열처리 강재 입니다.

※ Fine Grain Steel
Steels which resist grain growth over a considerable temperature range,
when held at temperature for a reasonable length
of time as is customary in heat treatment of steel

※ Grain Growth
During a heat treatment process grains can grow at elevated temperature.
Grain growth (increase in grain size) results in decrease of toughness.

※ Grain
Unit cells which are the smallest building blocks of material create
grains by coming together from different orientations.
Steel with a small grain size (high number of ASTM-standard) has a
high tensile strength and a good toughness.

Steel Grade		P275NL1	P275NL2
Chemical Composition (%)	Carbon (C)	0.16 max	←
	Silicon (Si)	0.40 max	←
	Manganese (Mn)	0.80~1.50	←
	Phosphorus (P)	0.025 max	0.020 max
	Sulfur (S)	0.008 max	0.005 max
	Chromium (Cr)	0.30 max	←
	Molybdenum (Mo)	0.08 max	←
	Nickel (Ni)	0.50 max	←
	Aluminum total	0.020 max	←
	Copper (Cu)	0.30 max	←
	Nitrogen (N)	0.01 max	←
	Niobium (Nb)	0.05 max	←
	Titanium (Ti)	0.03 max	←
	Vanadium (V)	0.05 max	←
Proof Stress (N/㎟)	t≤16	275 min	←
	16＜t≤40	265 min	←
	40＜t≤60	255 min	←
	60＜t≤100	235 min	←
	100＜t≤150	225 min	←
	150＜t≤250	215 min	←
Tensile Strength (N/㎟)	t≤60	390~510	←
	60＜t≤100	370~490	←
	100＜t≤150	360~480	←
	150＜t≤250	350~470	←
CVN	20℃	Longitudinal 75/Transverse 50
	0℃	Longitudinal 65/Transverse 40
	-20℃	Longitudinal 45/Transverse 30