冷拔冷軋精密無(wú)縫鋼管：GB3639-1999
16Mn縫鋼管中的一種材質(zhì)。過(guò)去無(wú)縫鋼管的一種叫法。當(dāng)前的稱法為：Q345B無(wú)縫鋼管，與此相近的材質(zhì)為Q345C，Q345D，Q345E，質(zhì)量等級(jí)符號(hào)A B C D E 分別表示不要求沖擊試驗(yàn) 沖擊試驗(yàn)溫度為+20度 0度 -20度 40度。
分類
16Mn為無(wú)縫鋼管中的一種材質(zhì)。
ABCD表示質(zhì)量等級(jí) Q235質(zhì)量等級(jí)分為A、B、C、D四級(jí)，由A到D表示質(zhì)量由低到高。不同質(zhì)量等級(jí)要求如下： A——提供S、P、C、Mn、Si化學(xué)成分和fu、fy、δ5（δ10），根據(jù)買方需要可提供1800冷彎試驗(yàn)，但無(wú)沖擊功規(guī)定，含炭量和含錳量不作為交貨條件。 B——提供S、P、C、Mn、Si化學(xué)成分和fu、fy、δ5（δ10），冷彎180‘試驗(yàn)。還提供+200C時(shí)沖擊功Ak≥27J C——除與B級(jí)要求一樣外，還提供00C時(shí)沖擊功Ak≥27J。 D----除與B級(jí)要求一樣外，還提供-200C時(shí)沖擊功Ak≥27J E——除與B級(jí)要求一樣外，還提供-400C時(shí)沖擊功Ak≥27J。
尺寸偏差
|
偏差等級(jí) |
標(biāo)準(zhǔn)化外徑允許偏差 |
|
D1 |
±1.5%，最小±0.75 mm |
|
D2 |
±1.0%。最小±0.50 mm |
|
D3 |
±0.75%．最小±0.30 mm |
|
D4 |
±0.50%。最小±0.10 mm |
|
布氏硬度(HB)10mm3000kgf |
維
氏
硬
度
(HV) |
洛氏硬度(3) |
肖
氏
硬
度
(HS) |
抗拉強(qiáng)度
(近似值)MPa(2) |
| 標(biāo)準(zhǔn)球 |
碳化鎢球 |
洛氏硬度A
載荷60kgf
金剛石圓錐
壓印頭
(HRA) |
洛氏硬度B
載荷100kgf
剛球Ø1.6mm球
(1/16in)
(HRB) |
洛氏硬度C
載荷100kgf
金剛石圓錐
壓印頭
(HRC) |
洛氏硬度D
載荷150kgf
金剛石圓錐
壓印頭
(HRD) |
| - |
- |
940 |
85.6 |
- |
68.0 |
76.9 |
97 |
- |
| - |
- |
920 |
85.3 |
- |
67.5 |
76.5 |
96 |
- |
| - |
- |
900 |
85.0 |
- |
67.0 |
76.1 |
95 |
- |
| - |
(767) |
880 |
84.7 |
- |
66.4 |
75.7 |
93 |
- |
| - |
(757) |
860 |
84.4 |
- |
65.9 |
75.3 |
92 |
- |
| |
|
|
|
|
|
|
|
|
| - |
(745) |
840 |
84.1 |
- |
65.3 |
74.8 |
91 |
- |
| - |
(733) |
820 |
83.8 |
- |
64.7 |
74.3 |
90 |
- |
| - |
(722) |
800 |
83.4 |
- |
64.0 |
73.8 |
88 |
- |
| - |
(712) |
- |
- |
- |
- |
- |
- |
- |
| - |
(710) |
780 |
83.0 |
- |
63.3 |
73.3 |
87 |
- |
| - |
(698) |
760 |
82.6 |
- |
62.5 |
72.6 |
86 |
- |
| |
|
|
|
|
|
|
|
|
| - |
(684) |
740 |
82.2 |
- |
61.8 |
72.1 |
- |
- |
| - |
(682) |
737 |
82.2 |
- |
61.7 |
72.0 |
84 |
- |
| - |
(670) |
720 |
81.8 |
- |
61.0 |
71.5 |
83 |
- |
| - |
(656) |
700 |
81.3 |
- |
60.1 |
70.8 |
- |
- |
| - |
(653) |
697 |
81.2 |
- |
60.0 |
70.7 |
81 |
- |
| |
|
|
|
|
|
|
|
|
| - |
(647) |
690 |
81.1 |
- |
59.7 |
70.5 |
- |
- |
| - |
(638) |
680 |
80.8 |
- |
59.2 |
70.1 |
80 |
- |
| - |
630 |
670 |
80.6 |
- |
58.8 |
69.8 |
- |
- |
| - |
627 |
667 |
80.5 |
- |
58.7 |
69.7 |
79 |
- |
| |
|
|
|
|
|
|
|
|
| - |
- |
677 |
80.7 |
- |
59.1 |
70.0 |
- |
- |
| - |
601 |
640 |
79.8 |
- |
57.3 |
68.7 |
77 |
- |
| |
|
|
|
|
|
|
|
|
| - |
- |
640 |
79.8 |
- |
57.3 |
68.7 |
- |
- |
| - |
578 |
615 |
79.1 |
- |
56.0 |
67.7 |
75 |
- |
| |
|
|
|
|
|
|
|
|
| - |
- |
607 |
78.8 |
- |
55.6 |
67.4 |
- |
- |
| - |
555 |
591 |
78.4 |
- |
54.7 |
66.7 |
73 |
2055 |
| |
|
|
|
|
|
|
|
|
| - |
- |
579 |
78.0 |
- |
54.0 |
66.1 |
- |
2015 |
| - |
534 |
569 |
77.8 |
- |
53.5 |
65.8 |
71 |
1985 |
| |
|
|
|
|
|
|
|
|
| - |
- |
533 |
77.1 |
- |
52.5 |
65.0 |
- |
1915 |
| - |
514 |
547 |
76.9 |
- |
52.1 |
64.7 |
70 |
1890 |
| |
|
|
|
|
|
|
|
|
| (495) |
- |
539 |
76.7 |
- |
51.6 |
64.3 |
- |
1855 |
| - |
- |
530 |
76.4 |
- |
51.1 |
63.9 |
- |
1825 |
| - |
495 |
528 |
76.3 |
- |
51.0 |
63.8 |
68 |
1820 |
| |
|
|
|
|
|
|
|
|
| (477) |
- |
516 |
75.9 |
- |
50.3 |
63.2 |
- |
1780 |
| - |
- |
508 |
75.6 |
- |
49.6 |
62.7 |
- |
1740 |
| - |
477 |
508 |
75.6 |
- |
49.6 |
62.7 |
66 |
1740 |
| |
|
|
|
|
|
|
|
|
| (461) |
- |
495 |
75.1 |
- |
48.8 |
61.9 |
- |
1680 |
| - |
- |
491 |
74.9 |
- |
48.5 |
61.7 |
- |
1670 |
| - |
461 |
491 |
74.9 |
- |
48.5 |
61.7 |
65 |
1670 |
| |
|
|
|
|
|
|
|
|
| 444 |
- |
474 |
74.3 |
- |
47.2 |
61.0 |
- |
1595 |
| - |
- |
472 |
74.2 |
- |
47.1 |
60.8 |
- |
1585 |
| - |
444 |
472 |
74.2 |
- |
47.1 |
60.8 |
63 |
1585 |
| |
|
|
|
|
|
|
|
|
| 429 |
429 |
455 |
73.4 |
- |
45.7 |
59.7 |
61 |
1510 |
| 415 |
415 |
440 |
72.8 |
- |
44.5 |
58.8 |
59 |
1460 |
| 401 |
401 |
425 |
72.0 |
- |
43.1 |
57.8 |
58 |
1390 |
| 388 |
388 |
410 |
71.4 |
- |
41.8 |
56.8 |
56 |
1330 |
| 375 |
375 |
396 |
70.6 |
- |
40.4 |
55.7 |
54 |
1270 |
| |
|
|
|
|
|
|
|
|
| 363 |
363 |
383 |
70.0 |
- |
39.1 |
54.6 |
52 |
1220 |
| 352 |
352 |
372 |
69.3 |
(110.0) |
37.9 |
53.8 |
51 |
1180 |
| 341 |
341 |
360 |
68.7 |
(109.0) |
36.6 |
52.8 |
50 |
1130 |
| 331 |
331 |
350 |
68.1 |
(108.5) |
35.5 |
51.9 |
48 |
1095 |
| 321 |
321 |
339 |
67.5 |
(108.0) |
34.3 |
51.0 |
47 |
1060 |
| |
|
|
|
|
|
|
|
|
| 311 |
311 |
328 |
66.9 |
(107.5) |
33.1 |
50.0 |
46 |
1025 |
| 302 |
302 |
319 |
66.3 |
(107.0) |
32.1 |
49.3 |
45 |
1005 |
| 293 |
293 |
309 |
65.7 |
(106.0) |
30.9 |
48.3 |
43 |
970 |
| 285 |
285 |
301 |
65.3 |
(105.5) |
29.9 |
47.6 |
- |
950 |
| 277 |
277 |
292 |
64.6 |
(104.5) |
28.8 |
46.7 |
41 |
925 |
| |
|
|
|
|
|
|
|
|
| 269 |
269 |
284 |
64.1 |
(104.0) |
27.6 |
45.9 |
40 |
895 |
| 262 |
262 |
276 |
63.6 |
(103.0) |
26.6 |
45.0 |
39 |
875 |
| 255 |
255 |
269 |
63.0 |
(102.0) |
25.4 |
44.2 |
38 |
850 |
| 248 |
248 |
261 |
62.5 |
(101.0) |
24.2 |
43.2 |
37 |
825 |
| 241 |
241 |
253 |
61.8 |
100 |
22.8 |
42.0 |
36 |
800 |
| |
|
|
|
|
|
|
|
|
| 235 |
235 |
247 |
61.4 |
99.0 |
21.7 |
41.4 |
35 |
785 |
| 229 |
229 |
241 |
60.8 |
98.2 |
20.5 |
40.5 |
34 |
765 |
| 223 |
223 |
234 |
- |
97.3 |
(18.8) |
- |
- |
|
| 217 |
217 |
228 |
- |
96.4 |
(17.5) |
- |
33 |
725 |
| 212 |
212 |
222 |
- |
95.5 |
(16.0) |
- |
- |
705 |
| |
|
|
|
|
|
|
|
|
| 207 |
207 |
218 |
- |
94.6 |
(15.2) |
- |
32 |
690 |
| 201 |
201 |
212 |
- |
93.8 |
(13.8) |
- |
31 |
675 |
| 197 |
197 |
207 |
- |
92.8 |
(12.7) |
- |
30 |
655 |
| 192 |
192 |
202 |
- |
91.9 |
(11.5) |
- |
29 |
640 |
| 187 |
187 |
196 |
- |
90.7 |
(10.0) |
- |
- |
620 |
| |
|
|
|
|
|
|
|
|
| 183 |
183 |
192 |
- |
90.0 |
(9.0) |
- |
28 |
615 |
| 179 |
179 |
188 |
- |
89.0 |
(8.0) |
- |
27 |
600 |
| 174 |
174 |
182 |
- |
87.8 |
(6.4) |
- |
- |
585 |
| 170 |
170 |
178 |
- |
86.8 |
(5.4) |
- |
26 |
570 |
| 167 |
167 |
175 |
- |
86.0 |
(4.4) |
- |
- |
560 |
| |
|
|
|
|
|
|
|
|
| 163 |
163 |
171 |
- |
85.0 |
(3.3) |
- |
25 |
545 |
| 156 |
156 |
163 |
- |
82.9 |
(0.9) |
- |
- |
525 |
| 149 |
149 |
156 |
- |
80.8 |
- |
- |
23 |
505 |
| 143 |
143 |
150 |
- |
78.7 |
- |
- |
22 |
490 |
| 137 |
137 |
143 |
- |
76.4 |
- |
- |
21 |
460 |
| |
|
|
|
|
|
|
|
|
| 131 |
131 |
137 |
- |
74.0 |
- |
- |
- |
450 |
| 126 |
126 |
132 |
- |
72.0 |
- |
- |
20 |
435 |
| 121 |
121 |
127 |
- |
69.8 |
- |
- |
19 |
415 |
| 116 |
116 |
122 |
- |
67.6 |
- |
- |
18 |
400 |
| 111 |
111 |
117 |
- |
65.7 |
- |
- |
15 |
385 |
16Mn結(jié)構(gòu)鋼管硬度試驗(yàn)是機(jī)械性能試驗(yàn)中最簡(jiǎn)單易行的一種試驗(yàn)方法。為了能用硬度試驗(yàn)代替某些機(jī)械性能試驗(yàn)，生產(chǎn)上需要一個(gè)比較準(zhǔn)確的硬度和強(qiáng)度的換算關(guān)系。
實(shí)踐證明，16Mn結(jié)構(gòu)鋼管材料的各種硬度值之間，硬度值與強(qiáng)度值之間具有近似的相應(yīng)關(guān)系。因?yàn)橛捕戎凳怯善鹗妓苄宰冃慰沽屠^續(xù)塑性變形抗力決定的，16Mn結(jié)構(gòu)鋼管的強(qiáng)度越高，塑性變形抗力越高，硬度值也就越高。 |
