結構用不鏽鋼無縫鋼管（GB/T14975

(1)尺寸規格見表6-17、表6-18。(2)答應偏差見表6-20。(3)牌號和化學成分見表6-19。(4)力學性能見表6-21。(5)用途適於一般結構及機械結構用。表6-17結構用不鏽鋼熱軋(擠、擴)無縫鋼管的尺寸規格(mm)

壁厚 外徑

4.5

5

6

7

8

9

10

ll

12

13

14

15

16

17

18

19

20

22

24

25

26

28

68

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◎

70

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73

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76

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◎

◎

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80

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83

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◎

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◎

89

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◎

◎

◎

◎

◎

95

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◎

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◎

◎

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◎

◎

◎

◎

102

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◎

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◎

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◎

◎

◎

◎

108

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◎

◎

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◎

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◎

◎

◎

114

◎

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◎

121

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◎

127

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◎

◎

◎

133

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◎

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◎

◎

◎

◎

140

◎

◎

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◎

◎

◎

◎

◎

146

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◎

◎

◎

◎

152

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◎

◎

159

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◎

◎

◎

168

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◎

◎

◎

180

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◎

◎

194

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◎

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219

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245

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237

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325

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◎

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35l

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377

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426

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表6-18結構用不鏽鋼冷拔(軋)無縫鋼管的尺寸規格 (mm)

壁厚 外徑

1.O

1.2

1.4

1.5

1.6

2.0

2.2

2.5

2.8

3.O

3.2

3.5

4.O

4.5

5.O

5.5

6.O

6.5

7.0

7.5

8.0

8.5

9.0

9.5

lO

ll

12

13

14

15

lO

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●

11

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12

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13

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14

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15

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16

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17

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18

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19

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20

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2l

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22

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23

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24

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25

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●

壁厚 外徑

1.0

1.2

1.4

1.5

1.6

2.0

2.2

2.5

2.8

3.0

3.2

3.5

4.0

4.5

5.O

5.5

6.0

6.5

7.O

7.5

8.O

8.5

9.O

9.5

lO

11

12

13

14

15

27

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28

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30

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32

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34

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35

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36

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38

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40

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42

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45

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48

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50

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53

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54

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56

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壁厚 外徑

1.0

1.2

1.4

1.5

1.6

2.0

2.2

2.5

2.8

3.0

3.2

3.5

4.0

4.5

5.O

5.5

6.0

6.5

7.O

7.5

8.O

8.5

9.O

9.5

lO

11

12

13

14

15

57

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60

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63

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65

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68

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70

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73

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75

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78

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80

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83

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85

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89

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90

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95

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100

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102

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壁厚 外徑

1.o

1.2

1.4

1.5

1.6

2.0

2.2

2.5

2.8

3.0

3.2

3.5

4.0

4.5

5.0

5.5

6.O

6.5

7.O

7.5

8.O

8.5

9.O

9.5

lO

11

12

13

14

15

108

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114

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127

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133

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140

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146

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159

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140

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146

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159

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註：1.●表示冷拔(軋)鋼管規格。2.鋼管的通常長度規定如下： 熱軋（擠、擴）鋼管……………………………………………………2～12m 冷拔(軋)鋼管……………………………………………………………1—8m 3.鋼管的彎曲度不得大於如下規定： 壁厚<15mm……………………………………………………·……1.5mm／m 壁厚≥15mm……………………………………·…………………2.0mm／m熱擴管…………………………………………………………………3.Omm／m表6-19結構用不鏽鋼無縫鋼管的牌號和化學成分

組織 類型	序號	牌 號	化學成分(質量分數)(％)
			C	Si	Mn	P	S	Ni	C	Mo	其 他
奧氏 體型	1	OCr18Ni9	≤0.07	≤1.00	≤2.00	≤0.035	≤0.030	8.00～11.00	17.00～19.00
	2	lCrl8Ni9	≤O.15	≤1.00	≤2.00	≤O.035	≤O.030	8.00～lO.00	17.00～19.00
	3	00Crl9NilO	≤0.030	≤1.00	≤2.00	≤0.035	≤O.030	8.00～12.00	18.00～20.00
	4	0Crl8Ni10Ti	≤0.08	≤1.00	≤2.O0	≤O.035	≤O.030	9.00～12.00	17.00～19.00		Ti≥5C％
	5	OCrl8NillNb	≤O.08	≤1.00	≤2.00	≤0.035	≤0.030	9.00～13.00	17.00～19.00		Nb≥10C％
	6	0Crl7Nil2M02	≤0.08	≤1.00	≤2.00	≤O.035	≤O.030	10.00～14.00	16.00～18.50	2.00～3.00
	7	00Crl7Nil4M02	≤0.030	≤1.00	≤2.00	≤O.035	≤0.030	12.00～15.00	16.00～18.oo	2.00～3.00
	8	OCrl8Nil2M02Ti	≤0.08	≤1.00	≤2.00	≤0.035	≤O.030	11.00～14.00	16.00～19.00	1.80～2.50	Ti 5C％～O.70
	9	1Crl8Nil2M02Ti	≤O.12	≤1.00	≤2.00	≤O.035	≤O.030	11.00～14.00	16.00～19.00	1.80～2.50	Ti 5(C％-0.02) ～0.80
	lO	0Crl8Nil2M03Ti	≤0.08	≤1.00	≤2.00	≤O.035	≤0.030	11.00～14.00	16.oo～19.00	2.50～3.50	Ti5C％～O.70
	11	1Crl8Ni12Mo3Ti	≤O.12	≤1.00	≤2.00	≤O.035	≤0.030	11.00～14.00	16.00～19.00	2.50～3.50	Ti 5(C％-0.02) ～0.80
	12	1Crl8Ni9Ti	≤0.12	≤1.00	≤2.00	≤O.035	≤0.030	8.00～11.00	17.00～19.oo		Ti 5(C％～O.02) ～0.80
	13	0Cr19Nil3M03	≤O.08	≤1.00	≤2.00	≤0.035	≤O.030	11.00～15.00	18.00～20.00	3.00～4.00
	14	00Crl9Nil3M03	≤0.030	≤1.00	≤2.00	≤0.035	≤O.030	11.00～15.00	18.00～20.00	3.00～4.00
鐵素 體型 馬氏 體型	15	OCrl3	≤O.08	≤0.60	≤0.80	≤0.035	≤O.030		12.00～14.00
	16	lCrl7	≤O.12	≤0.75	≤1.00	≤O.035	≤0.D30		16.00～18.00
	17	1Crl3	≤O.15	≤1.00	≤1.00	≤0.035	≤0.030		11.50～13.50
	18	2Crl3	O.16～0.25	≤1.00	≤1.00	≤O.035	≤O.030		12.00～14.00
註：*殘餘元素Ni≤O.60。

表6-20結構用不鏽鋼無縫鋼管的尺寸答應偏差

熱軋(擠、擴)鋼管				冷拔(軋)鋼管
尺寸／mm		答應偏差／mm		尺寸／mm		答應偏差／mm
		普通級	較高級			普通級	較高級
外徑D	68≤D≤159	±1.25	±l	外徑D	10≤D≤30	±O.30	土O.20
					30 < DIV>	土O.40	±O.30
	159 < DIV>	±1.5
					D>5	±O.9％	±0.8％
壁厚	<15	+15 -12.5	±12.5	壁厚	≤3	±14％	+12％ -10％
	≥15	+20 -15			>3	+12％ -10％	±lO％

註：供機械加工用鋼管應在契約中註明，根據需方要求，經供需雙方協定，可規定機械加工餘量。表6-2l結構用不鏽鋼無縫鋼管的力學性能

組織類型	序號	牌 號	推薦熱處理制度	力學性能			密度(g／cm3)
				ób／MPa	ó0. 2／MPa	δ5(％)
				≥
奧氏體型	l	OCr18Ni9	lOl0～1150℃， 急冷	520	205	35	7.93
	2	lCrl8Ni9	1010～1150℃，急冷	520	206	35	7.90
	3	00Crl9Ni10	1010～1150℃，急冷	480	175	35	7.93
	4	OCrl8Nil0Ti	920～1150℃，急冷	520	206	35	7.95
	5	0Crl8NillNb	980～1150cC，急冷	520	205	35	7.98
	6	OCrl7Nil2M02	1010～1150℃，急冷	520	205	35	7.98
	7	00Cr17Nil4M02	1010～1150℃。急冷	480	175	35	7.98
	8	OCr18Mil2M02Ti	1000～1100℃，急冷	530	205	35	8.00
	9	lCrl8Nil2M02Ti	1000～1100℃，急冷	530	205	35	8.00
	10	oCr18Nil2M03Ti	1000～1100℃，急冷	530	205	35	8.10
	11	1Crl8Nil2M03Ti	1000～1100℃。急冷	530	205	35	8.10
	12	1Cr18Ni9Ti	1000～1100℃，急冷	520	205	35	7.90
	13	0Crl9Nil3M03	10lO～1150℃，急冷	520	205	35	7.98
	14	00Crl9Ni13M03	lOlO～1150℃，急冷	480	175	35	7.98
鐵索體型	15	OCrl3	780～830℃，空冷或緩冷	370	180	22	7.70
	16	lCrl7	780～850℃，空冷或緩冷	410	245	20	7.70
馬氏體型	17	lCrl3	800～900℃，緩冷	410	205	20	7.70
	18	2Crl3	800～900℃，緩冷	470	215	19	7.70

註：1.熱擠壓管的抗拉強度答應降低20MPa。 2.鋼管經熱處理並酸洗交貨。凡經整體磨、鏜或經保護氣氛熱處理的鋼管，可不經酸洗交貨。3.供機械加工用鋼管可不經酸洗交貨。