(3)牌号和化学成分
高压锅炉用无缝钢管的牌号和化学成分
牌类 |
序
号 |
牌 号 |
化学成分(质量分数)(%) |
|
C |
Mn |
Si |
Q |
Mo |
V |
Ti |
B |
W |
Ni |
A1 |
Nb |
N |
S |
P |
≤ |
优质
碳素
结构钢 |
1 |
20G |
0.17-0.24 |
0.35-0.65 |
0.17-0.37 |
|
|
|
|
|
|
|
|
|
|
0.030 |
0.030 |
2 |
20MnG |
0.17-0.24 |
0.70-1.00 |
0.17-0.37 |
|
|
|
|
|
|
|
|
|
|
0.030 |
0.030 |
3 |
25MnG |
0.22-0.30 |
0.70-1.00 |
0.17-0.37 |
|
|
|
|
|
|
|
|
|
|
0.030 |
0.030 |
合金
结构钢 |
4 |
15Mog |
0.12-0.20 |
0.40-0.80 |
0.17-0.37 |
|
0.25-0.35 |
|
|
|
|
|
|
|
|
0.030 |
0.030 |
5 |
20MoG |
0.15-0.25 |
0.40-0.80 |
0.17-0.37 |
|
0.44-0.65 |
|
|
|
|
|
|
|
|
0.030 |
0.030 |
6 |
12CrMoG |
0.08-0.15 |
0.40-0.70 |
0.17-0.37 |
0.40-0.70 |
0.40-0.55 |
|
|
|
|
|
|
|
|
0.030 |
0.030 |
7 |
15CrMoG |
0.12-0.18 |
0.40-0.70 |
0.17-0.37 |
0.80-1.10 |
0.40-0.55 |
|
|
|
|
|
|
|
|
0.030 |
0.030 |
8 |
12Cr2MoG |
0.08-0.15 |
0.40-0.70 |
≤0.50 |
2.00-2.50 |
0.90-1.20 |
|
|
|
|
|
|
|
|
0.030 |
0.030 |
9 |
12Cr1MoVG |
0.08-0.15 |
0.40-0.70 |
0.17- 0.37 |
0.90-1.20 |
0.25-0.35 |
0.15-0.30 |
|
|
|
|
|
|
|
0.030 |
0.030 |
10 |
12Cr2MoWVTiB |
0.08-0.15 |
0.45-0.65 |
0.45-0.75 |
1.60-2.10 |
0.50-0.65 |
0.28-0.42 |
0.08-0.18 |
0.002-0.008 |
0.30-0.55 |
|
|
|
|
0.030 |
0.030 |
11 |
12Cr3MoVSiTiB |
0.09-0.15 |
0.50-0.80 |
0.60-0.90 |
2.50-3.00 |
1.00-1.20 |
0.25-0.35 |
0.22-0.38 |
0.005-0.011 |
|
|
|
|
|
0.030 |
0.030 |
12 |
10Cr9Mo1VNb |
0.08-0.12 |
0.30-0.60 |
0.20-0.50 |
8.00-9.50 |
0.85-1.05 |
0.18-0.25 |
|
|
|
≤0.40 |
≤0.040 |
0.06-0.10 |
0.030-0.070 |
.010 |
0.020 |
不锈
耐热钢 |
13 |
1Cr18NNi9 |
≤0.15 |
≤2.00 |
≤1.00 |
17.00-19.00 |
|
|
|
|
|
8.00-10.00 |
|
|
|
0.030 |
0.035 |
14 |
1Cr19Ni11NB |
0.04-0.10 |
≤2.00 |
≤1.00 |
17.00-20.00 |
|
|
|
|
|
9.00-13.00 |
|
Nb+Ta
≥80%-1.00% |
|
0.030 |
0.030 |
注:
1.20G、20MnG、25MnG的残余元素含量w要求:Cu≤0.20%、Cr≤0.25%、Ni≤0.25%、V≤0.08%、Mo≤0.15%。其余牌号Cu≤0.20%、Cr≤0.30%、Ni≤0.30%。
2.20G钢中酸溶铝不大于0.010%,暂不作交货依据,但应填入质量证明书中。
3.用氢气转炉加炉外精炼制造的钢.氮含量w不大于0.008%。 |
(4)力学性能
高压锅炉用无缝钢管的热处理制度
序号 |
牌 号 |
热处理制度 |
1 |
20G |
900~930°C正火,热轧管的终轧温度不小于900°C时,可以代替正火 |
2 |
20MnG 25MnG |
900~930°C正火,热轧管的终轧温度不小于900°C时,可以代替正火 |
3 |
15MoG①
20MoG① |
910~940°C正火 |
4 |
12CrMoG① |
900~930°C正火。670~720°C回火,保温时间:周期式炉大于2h。连续炉大于1h |
5 |
15CrMoG① |
930~960°C正火。680—720°C回火,保温时间:周期式炉大于2h。连续炉大于1h |
6 |
12Cr2MoG① |
900~960°C正火,700~750°C回火,也可进行加热至900~960°C,炉冷至700C12保温1h以上,空冷 |
7 |
12Cr1MoVG① |
980~1020°C正火,保温时间按壁厚每毫米1min计,但不少于20min。720~760°C回火,保温时间,周期式炉大于2h,连续炉大于1h,当壁厚大于30mm至40mm应进行强制冷却;当壁厚大于40mm,应进行调质处理,淬火温度950—990°C,回火温度720~760°C,保温时间:周期式炉大于2h |
8 |
12Cr2MoWVTiB |
1000~1035°C正火,保温时间:按壁厚每毫米1.5min计,但不少于20min。760~790°C回火,
保温时间:周期式炉大于2h,连续炉大于1h |
9 |
12Cr3MoVSiTiB |
1040~1090°正火,保温时间:按壁厚每毫米1.5min计,但不少于20min。720~770°C回火,
保温时间:周期式炉大于2h,连续炉大于1h |
10 |
10Cr9Mo1VNb |
1040~1060℃正火,保温时间:按壁厚每毫米1.5min计,但不少于20min。770~790℃回火,
保温时间:周期式炉大于2h,连续炉大于1h |
11 |
1Cr18Ni9 |
固溶处理:固溶温度≥1040℃ |
12 |
1Cr19Ni11Nb |
固溶处理:热轧(挤、扩)管,固溶温度≥1050℃,冷拔(轧)管固溶温度≥1095℃ |
①当热轧15MoG、20MoG、12CrMoG、15CrMoG、12Cr2MoG、12Cr1MoVG钢管的终轧温度符合表中规定的正火温度时,可以热轧代替正火。
高压锅炉用无缝钢管的力学性能
序号 |
钢类 |
牌 号 |
纵向力学性能 |
横向力学性能 |
抗拉强度
ób/MPa |
屈服点
ós /MPa |
伸长率
δ5(%) |
冲击
吸收功
Akv/J |
抗拉强度
ób/MPa |
屈服点
ós /MPa |
伸长率
δ5(%) |
冲击吸收功
AKv/J |
≥ |
≥ |
1 |
优质
碳素
结构钢 |
20G |
410~550 |
245 |
24 |
35 |
400 |
215 |
22 |
27 |
2 |
20MnG |
≥415 |
240 |
22 |
35 |
|
|
|
27 |
3 |
25MnG |
≥485 |
275 |
20 |
35 |
|
|
|
27 |
4 |
合金
结构钢 |
15MoG |
450~600 |
270 |
22 |
35 |
|
|
20 |
27 |
5 |
20MoG |
≥415 |
220 |
22 |
35 |
|
|
|
27 |
6 |
12CrMoG |
410~560 |
205 |
21 |
35 |
|
|
|
27 |
7 |
15CrMoG |
440~640 |
235 |
21 |
35 |
440 |
225 |
20 |
27 |
8 |
12Cr2MoG |
450~600 |
280 |
20 |
35 |
|
|
18 |
27 |
9 |
12Cr1MoVG |
470~640 |
255 |
21 |
35 |
440 |
255 |
19 |
27 |
10 |
12Cr2MoWVTiB |
540~735 |
345 |
18 |
35 |
|
|
|
27 |
11 |
12Cr3MoVSiTiB |
610~805 |
440 |
16 |
35 |
|
|
|
27 |
12 |
10Cr9Mo1VNb |
≥585 |
415 |
20 |
35 |
|
|
|
27 |
13 |
1Cr18Ni9 |
≥520 |
205 |
35 |
|
|
|
|
|
14 |
1Cr19Ni11Nb |
≥520 |
205 |
35 |
|
|
|
|
|
注:
1.外径大于和等于76mm,且壁厚大于和等于14mm的钢管应做纵向冲击试验。
2.外径大于和等于219mm,且壁厚大于和等于25mm的钢管,可做横向力学性能试验代替纵向力学性能试验。
3.一组三个冲击试样中允许一个试样的冲击吸收功比表中规定的最小值低30%,但三个试样的算术平均值不小于表中的规定值。
4.用12Cr2MoG钢制造的钢管,当壁厚不大于3mm,且外径不大于30mm或当壁厚不大于16—40mm时,屈服点允许降低10MPa,当壁厚大于40mm时,屈服点允许降低20MPa。
钢管的高温规定非比例伸长应力(ó0.2)最小值(MPa)
序号 |
牌 号 |
温 度/℃ |
100 |
150 |
200 |
250 |
300 |
350 |
400 |
450 |
500 |
550 |
600 |
1 |
20G |
|
|
215 |
196 |
177 |
157 |
137 |
98 |
49 |
|
|
2 |
20MnG |
219 |
214 |
208 |
197 |
183 |
175 |
168 |
156 |
151 |
|
|
3 |
25MnG |
252 |
245 |
237 |
226 |
210 |
201 |
192 |
179 |
172 |
|
|
4 |
15MoG |
|
|
225 |
205 |
180 |
177 |
160 |
155 |
150 |
|
|
5 |
20MoG |
207 |
199 |
202 |
187 |
182 |
177 |
169 |
168 |
150 |
|
|
6 |
15CrMoG |
|
|
269 |
256 |
242 |
228 |
216 |
285 |
198 |
|
|
7 |
12Cr2MoG |
191 |
187 |
186 |
185 |
185 |
185 |
185 |
182 |
173 |
159 |
|
8 |
12Cr1MoVG |
|
|
|
|
230 |
225 |
219 |
211 |
201 |
187 |
|
9 |
12Cr2MowvTiB |
|
|
|
|
368 |
357 |
352 |
343 |
328 |
305 |
274 |
10 |
12Cr3MoVSiTiB |
|
|
|
|
403 |
397 |
398 |
379 |
364 |
342 |
|
11 |
10Cr9Mo1VNb |
|
|
380 |
370 |
360 |
350 |
340 |
325 |
300 |
260 |
200 |
12 |
1Cr18Ni9 |
171 |
155 |
144 |
136 |
128 |
124 |
119 |
115 |
111 |
106 |
|
13 |
1Cr19Ni11Nb |
239 |
227 |
216 |
207 |
200 |
195 |
191 |
190 |
189 |
188 |
|
(5)用途
用于制造高压水管锅炉受热面。
钢管100000h的持久强度推荐数据
持久强度 |
100000h持久强度ó105/MPa |
试验温度/℃ |
400 |
410 |
420 |
430 |
440 |
450 |
460 |
470 |
480 |
490 |
500 |
510 |
520 |
530 |
540 |
550 |
560 |
570 |
序号 |
牌号 |
1 |
20G |
128 |
116 |
104 |
93 |
83 |
74 |
65 |
58 |
51 |
45 |
39 |
|
|
|
|
|
|
|
2
3 |
20MnG
25MnG |
|
|
|
110
120 |
100
103 |
87
88 |
75
75 |
64
64 |
55
55 |
46
46 |
39
39 |
31
31 |
|
|
|
|
|
|
4
5 |
15MoG
20MoG |
|
|
|
|
|
245 |
209 |
174 |
143
145 |
117
124 |
93
105 |
74
85 |
59
71 |
47
59 |
38
50 |
31
40 |
|
|
6
7 |
15CrMoG
12Cr2MoG |
|
|
|
|
|
|
|
|
|
168 |
145
124 |
124
112 |
106
102 |
91
91 |
75
83 |
61
72 |
64 |
56 |
8
9 |
12Cr1MoVG
12Cr2MoWVTiB |
|
|
|
|
|
|
|
|
|
|
184 |
169 |
153 |
138 |
124
176 |
110
162 |
98
147 |
85
132 |
10
11 |
12Cr3MoVSiTiB
10C19Mo1VNb |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
148 |
135 |
122 |
110 |
12
13 |
1Cr18Ni9
1Cr19Ni11Nb |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
持久强度 |
100000h持久强度ó105/MPa |
试验温度/℃ |
580 |
590 |
600 |
610 |
620 |
630 |
640 |
650 |
660 |
670 |
680 |
690 |
700 |
710 |
720 |
730 |
740 |
750 |
序号 |
牌号 |
1 |
20G |
|
|
|
|
|
|
|
|
|
|
|
| ,
|
|
|
|
|
|
2
3 |
20MnG
25MnG |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
4
5 |
15MoG
20MoG |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
6
7 |
15CrMoG
12Cr2MoG |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
8
9 |
12Cr1MoVG
12Cr2MoWVTiB |
75
118 |
64
105 |
66
82 |
80 |
69 |
59 |
58 |
|
|
|
|
|
|
|
|
|
|
|
10
11 |
12Cr3MoVSiTiB
10Cr9Mo1VNb |
98 |
88
112 |
78
88 |
69
89 |
61
74 |
54
63 |
47
53 |
44 |
|
|
|
|
|
|
|
|
|
|
12
13 |
1Cr18Ni9
1Cr19Ni11Nb |
|
|
95
132 |
88
121 |
81
110 |
74
100 |
68
91 |
63
82 |
57
74 |
52
66 |
48
60 |
43
54 |
40
48 |
36
43 |
33
38 |
31
34 |
28
31 |
26
28 |
16.锅炉、热交换器用不锈钢无缝钢管(GBl3296-1991)
(1)尺寸规格
锅炉、热交换器用不锈钢无缝钢管的尺寸规格
外径/mm |
壁厚mm |
1.2 |
1.5 |
2.0 |
2.2 |
2.5 |
2.8 |
3.0 |
3.2 |
3.5 |
4.0 |
4.5 |
5.0 |
5.5 |
6.0 |
6.5 |
7.0 |
7.5 |
8.0 |
9.0 |
10.0 |
11.0 |
12.0 |
13.0 |
8.0 |
o |
o |
o |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
10.0 |
o |
o |
o |
o |
o |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
12.0 |
o |
o |
o |
o |
o |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
14.0 |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
16.0 |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
19.0 |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
22.0 |
o |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
25.0 |
o |
o |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
27.0 |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
|
|
|
|
|
|
|
|
|
32.0 |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
|
|
|
|
|
|
|
|
34.0 |
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
|
|
|
|
|
|
|
38.0 |
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
|
|
|
|
|
|
42.0 |
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
|
|
|
|
|
45.0 |
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
|
|
|
|
48.0 |
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
|
|
|
51.0 |
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
|
|
|
54.0 |
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
57.0 |
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
60.0 |
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
63.0 |
|
|
|
|
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
65.0 |
|
|
|
|
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
70.0 |
|
|
|
|
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
|
|
|
|
76.0 |
|
|
|
|
|
|
|
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
83.0 |
|
|
|
|
|
|
|
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
89.0 |
|
|
|
|
|
|
|
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
102.0 |
|
|
|
|
|
|
|
|
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
|
108.0 |
|
|
|
|
|
|
|
|
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
|
114.0 |
|
|
|
|
|
|
|
|
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
121.0 |
|
|
|
|
|
|
|
|
|
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
127.0 |
|
|
|
|
|
|
|
|
|
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
133.0 |
|
|
|
|
|
|
|
|
|
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
140.0 |
|
|
|
|
|
|
|
|
|
|
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
146.0 |
|
|
|
|
|
|
|
|
|
|
|
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
159.0 |
|
|
|
|
|
|
|
|
|
|
|
|
|
o |
o |
o |
o |
o |
o |
o |
o |
o |
o |
注:表中的符号“×”表示有产品。
(2)尺寸偏差
锅炉、热交换器用不锈钢无缝钢管的尺寸允许偏差(mm)
钢管种类 |
钢管尺寸 |
允许偏差 |
钢管种类 |
钢管尺寸 |
允许偏差 |
热轧、热挤压管 |
外径
≤140
>140 |
±1.25%
±1% |
冷拔(轧)管 |
外径
8-30
>30-50
>50 |
±0.20
±0.30
±0.8% |
壁厚
≤10
>10 |
±12.5%
±15% |
壁厚
1.0-3.0
>3.0 |
+12%
-10
±10% |
注:1.冷拔(轧)热交换器钢管,在公差带不变的情况下,以正公差交货。
2.钢管的通常长度规定如下:
热轧(挤)钢管………………………………………………3-12m
冷拔(轧)钢管………………………………………………3-8m
水管锅炉用钢管通常长度为:
热轧(挤)钢管………………………………………………4-12m
冷拔(轧)钢管………………………………………………4-8m
3.钢管的弯曲度不得大于如下规定:
壁厚≤15mm………………………………………………1.5mm/m
壁厚>15mm………………………………………………2.0mm/m
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