P280GH (1.0426) Carbon Steels With High Temperature Characteristics- SCALE STEEL.

P280GH in European standard EN 10222-2017 "pressure steel forgings - part 2: have a certain high temperature performance of ferrite and martensite steel", its composition and performance in JB 4726-2000 the pressure vessel [SCALE STEEL]with carbon steel and low alloy steel forgings of 16 mn is similar, also with our country GB - 2009-24512.1 the nuclear power plant in seamless steel tube part 1: carbon steel seamless steel tube, HD280, HD280Cr of similar.

Component Specification（EN 10222-2-2017）（similarly hereinafter）
C 0.08~0.20 Cr ≤0.30 Ti ≤0.03
Si ≤0.40 Cu ≤0.30 V ≤0.02
Mn 0.90~1.50 Mo ≤0.08 Cr+Cu+Mo+Ni ≤0.70
P ≤0.025 Nb ≤0.01 carbon equivalent ≤0.45
S ≤0.015 Ni ≤0.30 [SCALE STEEL]

Heat Treatment
name code technology
normalizing[SCALE STEEL] N 880~920℃，air cooling
Normal + tempering NT 880~920℃，air cooling、oil cooling、water-cooling
600~640℃，air cooling、furnace cooling
Quenching + tempering QT
 
Room-Temperature Mechanical Property 
SIZE tR≤35 35＜tR≤160
yield strength ReH(MPa) ≥280 ≥255
strength of extension
Rm(MPa) 460~580[SCALE STEEL]
percentage elongation after fracture  A% l ≥23
tr/t ≥21
ballistic work J l ≥48
tr/t ≥27

Strong Non - Proportional Extension of Requirements for High Temperature Environments Rp0.2(MPa)
SIZE tR≤50 50＜tR≤160
T 100℃[SCALE STEEL] ≥250 ≥210
150℃ ≥235 ≥200
200℃ ≥225 ≥195
250℃ ≥205 ≥185
300℃ ≥185 ≥170
350℃ ≥170 ≥155
400℃ ≥155 ≥135

Applications：
P280GH is a kind of carbon steel with specified high temperature characteristics, and has good impact toughness and welding performance.Its use is similar to 16Mn, such as shell and tube heat exchanger carbon steel tube plate, flange, etc.The important use of P280GH is in the field of nuclear power, in the nuclear [SCALE STEEL]power components are mainly used as steam generator main steam system, water supply control system, auxiliary water supply system of rolling pipe fittings or forged pipe fittings, or steam generator main steam system forging or die forging elbow.