全球鋼材百科網
P250GH簡介

牌號 P250GH
歐標鋼號 1.0460
對應標準 EN 10222-2-2017
壓力用途用鋼制鍛件 第2部分 具有高溫特性的鐵素體和馬氏體鋼
Steel Forgings for Pressure Purposes. Part 2:Ferritic and Martensitic Steels with Specified Elevated Temperature Properties
歸類 碳鋼
P250GH 化學元素成分含量(%)
成分 C Si Mn P S Cr Ni Cu Mo Ti V Nb 更多
最小值 0.18 - 0.3 - - - - - - - - - Cr+Cu+Mo+Ni≤0.70;碳當量≤0.43
最大值 0.23 0.4 0.9 0.025 0.015 0.3 0.3 0.3 0.08 0.03 0.02 0.01
碳當量計算
P250GH 機械性能
厚度
t
mm
熱處理或狀態(tài)
抗拉強度
σb
Mpa
屈服點
σs
Mpa
斷后伸長率或延伸率
δ
%
沖擊吸收能量
KV2
J
t≤60 奧氏體化或固溶退火,890~950℃,空冷 410~540 ≥250 I:≥25,tr/t:≥20 I:≥44,tr/t:≥31
60<t≤105 奧氏體化或固溶退火,890~950℃,空冷 410~540 ≥240 I:≥25,tr/t:≥20 I:≥44,tr/t:≥31
105<t≤225 奧氏體化或固溶退火,890~950℃,空冷 410~540 ≥230 I:≥25,tr/t:≥19 I:≥44,tr/t:≥31
225<t≤375 奧氏體化或固溶退火,890~950℃,空冷 400~520 ≥210 I:≥25,tr/t:≥19 I:≥40,tr/t:≥27
375<t≤750 奧氏體化或固溶退火,890~950℃,空冷 400~520 ≥200 I:≥25,tr/t:≥19 I:≥40,tr/t:≥27
① I = longitudinal to main forging directions;tr = transverse to main forging directions;t = tangential.
② Maximum room temperature for the impact test is 20 °C. By option, impact testing may be carried out at 0°C, with the condition to fulfil the impact values as stated in this table.
③ Until the yield point criteria are harmonized in the various national codes, determination of ReH may be replaced by determination of Rp0.2. In this case Rp0.2 values are 10 MPa lower for ReH values up to 355 MPa and 15 MPa lower for ReH values greater than 355 MPa.
全球鋼材百科網