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B3簡介

牌號 B3
對應(yīng)標(biāo)準(zhǔn) BS 3100-1991
一般工程用鑄鋼件
Specification for Steel castings for general engineering purposes
歸類 鑄鋼
標(biāo)簽 高溫用合金鋼鑄鋼
B3 化學(xué)元素成分含量(%)
成分 C Si Mn P S Cr Ni ② Cu ② Mo
最小值 - - 0.4 - - 2 - - 0.9
最大值 0.18 0.6 0.7 0.04 0.04 2.75 0.4 0.3 1.2
①碳含量每降低0.01%，最大錳含量則增加0.04%，允許最大錳含量到1.1%
②殘余元素。 碳當(dāng)量計算
B3 機(jī)械性能
熱處理或狀態(tài)
抗拉強(qiáng)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
N+T或OQ+T或WQ+T(T720°C max) ≥540 ≥325 ≥17 ≥25
A=for anneal by heating to a temperature above the AC3 and cool in the furnace
N=for normalize by heating to a temperature above the AC3 and cool in still air
OQ=for quench into oil from a temperature above the AC3
WQ=for quench into water from a temperature above the AC3
AH=for air harden by heating to a temperature above the AC3 and cool in air at a rate fast enough to produce a hardened microstructure
T=for temper by heating to a temperature below AC1
ST=for solution treat by heating to temperature high enough to dissolve and any intermetallic phases followed by a rapid cool. 如果買方要求對這些等級進(jìn)行沖擊試驗，則不進(jìn)行彎曲試驗。
近似對照表 鑄鋼
日本 美國 德國 英國
JIS ASTM UNS DIN EN/DIN W-Nr. BS EN/BS
SCPH21 WC11 J11872 CS-17CrMo55 1.7357 662
B3
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