2.分类:依照 EN10020,P235GH,P265GH,P295GH 和 P355GH 是非合金钢,其它所有钢是合金特殊钢。
化学成分
钢种 |
%质量 |
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牌号 |
数字 |
C |
Si, |
Mn |
P |
S |
Al 全 |
N |
Cr |
Cu b |
Mo |
Nb |
Ni |
Ti |
P235GH |
1.0345 |
≤ 0.16 |
≤ 0.35 |
0.60C- 1.20 |
≤ 0.025 |
≤ 0.015 |
≥ 0.020 |
≤ 0.012d |
≤ 0.30 |
≤ 0.30 |
≤ 0.08 |
≤ 0.020 |
≤ 0.30 |
≤ 0.03 |
P265GH |
1.0425 |
≤ 0.20 |
≤ 0.40 |
0.80C- 1.40 |
≤ 0.025 |
≤ 0.015 |
≥ 0.020 |
≤ 0.012d |
≤ 0.30 |
≤ 0.30 |
≤ 0.08 |
≤ 0.020 |
≤ 0.30 |
≤ 0.03 |
P295GH |
1.0481 |
0.08- 0.20 |
≤ 0.40 |
0.90C- 1.50 |
≤ 0.025 |
≤ 0.015 |
≥ 0.020 |
≤ 0.012d |
≤ 0.30 |
≤ 0.30 |
≤ 0.08 |
≤ 0.020 |
≤ 0.30 |
≤ 0.03 |
P355GH |
1.0473 |
0.10- 0.22 |
≤ 0.60 |
1.10- 1.70 |
≤ 0.025 |
≤ 0.015 |
≥ 0.020 |
≤ 0.012d |
≤ 0.30 |
≤ 0.30 |
≤ 0.08 |
≤ 0.020 |
≤ 0.30 |
≤ 0.03 |
16Mo3 |
1.5415 |
0.12- 0.20 |
≤ 0.35 |
0.40- 0.90 |
≤ 0.025 |
≤ 0.010 |
e |
≤ 0.012 |
≤ 0.30 |
≤ 0.30 |
0.25- 0.35 |
_ |
≤ 0.30 |
_ |
|
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熔炼分析界限值所允许的成品分析偏差
元素 |
根据表 1 的熔炼分析规定数值 %质量 |
成品分析的允许偏差a %质量 |
C |
≤0.23 |
±0.02 |
Si |
≤0.35 |
±0.05 |
>0.35--≤1.00 |
±0.06 |
|
Mn |
≤1.00 |
±0.05 |
>1.00--≤1.70 |
±0.10 |
|
P |
≤0.015 |
+0.003 |
>0.015--≤0.025 |
+0.005 |
|
S |
≤0.015 |
+0.003 |
Al |
≥0.010 |
±0.005 |
B |
≤0.003 |
±0.0005 |
N |
≤0.020 |
+0.002 |
>0.020--≤0.070 |
±0.005 |
|
Cr |
≤2.0 |
±0.05 |
>2.00--≤10.00 |
±0.10 |
|
Cu |
≤0.30 |
±0.05 |
>0.30--≤0.80 |
±0.10 |
|
Mo |
≤0.35 |
±0.03 |
>0.35--≤1.10 |
+0.04 |
|
Nb |
≤0.10 |
±0.01 |
Ni |
≤0.30 |
+0.05 |
>0.30--≤1.30 |
±0.10 |
|
Cr+Cu+Mo+Ni |
≤0.70 |
+0.05 |
Ti |
≤0.03 |
±0.01 |
V |
≤0.05 |
±0.01 |
>0.05--≤0.30 |
±0.03 |
|
a 如果一炉钢进行多次成品分析且单个元素确定值超出了化学成分的允许范围,只 允许此值超出最大允许值或低于最小允许值,对于一炉钢二者不能同时。 |
力学性能
钢种 |
通常交货状态 b,c |
产品厚度 t,mm |
室温拉伸性能 |
最小冲击功,KV, J,℃ |
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屈服强度ReH MPa, 最小 |
抗拉强度 Rm
MPa |
断后伸长率A % 最小 |
-20 |
0 |
+20 |
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名称 |
数字 |
||||||||
P235GH |
1.0345 |
d +N |
≤16 |
235 |
360--480 |
24 |
27 |
34 |
40 |
16 |
225 |
||||||||
40 |
215 |
||||||||
60 |
200 |
||||||||
100 |
185 |
350--480 |
|||||||
150 |
170 |
340--480 |
|||||||
P265GH |
1.0425 |
d +N |
≤16 |
265 |
410--530 |
22 |
27 |
34 |
40 |
16 |
255 |
||||||||
40 |
245 |
||||||||
60 |
215 |
||||||||
100 |
200 |
400—530 |
|||||||
150 |
185 |
390--530 |
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P295GH |
1.0481 |
d +N |
≤16 |
295 |
460—580 |
21 |
27 |
34 |
40 |
16 |
290 |
||||||||
40 |
285 |
||||||||
60 |
260 |
||||||||
100 |
235 |
440—570 |
|||||||
150 |
220 |
430--570 |
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P355GH |
1.0473 |
d +N |
≤16 |
355 |
510—650 |
20 |
27 |
34 |
40 |
16 |
345 |
||||||||
40 |
335 |
||||||||
60 |
315 |
490—630 |
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100 |
295 |
480—630 |
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150 |
280 |
470--630 |
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16Mo3 |
1.5415 |
e +N |
≤16 |
275 |
440—590 |
22 |
f |
f |
31 |
16 |
270 |
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40 |
260 |
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60 |
240 |
430—560 |
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100 |
220 |
420—570 |
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150 |
210 |
410--570 |
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