用途:用于石油、天然氣工業(yè)中的氣、水、油輸送
API SPEC 5L-2011(管線管規(guī)范),是美國(guó)石油學(xué)會(huì)編制并發(fā)布的,在世界各地通用。該管主要材質(zhì)為L(zhǎng)245、L290、L360、L415、L480、GR.B、X42、X46、X56、X65、X70、X80、X100等鋼級(jí)。
根據(jù)GB/T9711.1管線鋼管性能要求的不同,按其回火溫度的不同,可將回火分為以下幾種:
【一】低溫回火(150-250度)
低溫回火所得組織為回火馬氏體。其目的是在保持淬火鋼的高硬度和高耐磨性的前提下,降低其淬火內(nèi)應(yīng)力和脆性,以免使用時(shí)崩裂或過(guò)早損壞。它主要用于各種高碳的切削刃具,量具,GB/T9711.1管線鋼管,滾動(dòng)軸承以及滲碳件等,回火后硬度一般為HRC58-64。
【二】中溫回火(250-500度)
中溫回火所得組織為回火屈氏體。其目的是獲得高的屈服強(qiáng)度,彈性極限和較高的韌性。因此,它主要用于各種GB/T9711.1管線鋼管和熱作模具的處理,回火后硬度一般為HRC35-50。
【三】高溫回火(500-650度)
高溫回火所得組織為回火索氏體。習(xí)慣上將淬火加高溫回火相結(jié)合的熱處理稱為調(diào)質(zhì)處理,其目的是獲得強(qiáng)度,硬度和塑性,韌性都較好的綜合機(jī)械性能。因此,廣泛用于汽車,GB/T9711.1管線鋼管,機(jī)床等的重要結(jié)構(gòu)零件,如連桿,螺栓,齒輪及軸類;鼗鸷笥捕纫话銥镠B200-330。
力學(xué)性能:
Standard |
Product Level |
Steel grade |
Yield Strength (min), Mpa |
Tensile Strength(MPa) |
API 5L GB/T9711.2 |
PSL 1 |
A or L210 |
210 |
335 |
B or L245 |
245 |
415 |
||
x42 or L290 |
290 |
415 |
||
X46 or L320 |
320 |
435 |
||
X52 or L360 |
360 |
460 |
||
X56 or L390 |
390 |
490 |
||
X60 or L415 |
415 |
520 |
||
X70 |
483 |
565 |
||
PSL 2 |
BR or L245R |
245~450 |
415~760 |
|
X42R or L290R |
290~495 |
415~760 |
||
BN or L245N |
245~450 |
415~760 |
||
X42N or L290N |
290~495 |
415~760 |
||
X46N or L320N |
320~525 |
435~760 |
||
X52N or L360N |
360~530 |
460~760 |
||
X56N or L390N |
390~545 |
490~760 |
||
X60N or L415N |
415~565 |
520~760 |
||
X65N or L450N |
425~566 |
525~760 |
||
X70 or L480 |
484~565 |
565~768 |
||
X80 |
552~690 |
621~827 |
管線管化學(xué)元素表:
roduct Level |
Steel grade |
Chemical composition, % |
||||||||
C |
Mn |
P |
S |
Si |
V |
Nb |
Ti |
CEpcm |
||
PSL 1 |
B or L245 |
≤0.28 |
≤1.20 |
≤0.030 |
≤0.030 |
- |
- |
- |
- |
- |
x42 or L290 |
≤0.28 |
≤1.30 |
≤0.030 |
≤0.030 |
- |
- |
- |
- |
- |
|
X46 or L320 |
≤0.28 |
≤1.40 |
≤0.030 |
≤0.030 |
- |
- |
- |
- |
- |
|
X52 or L360 |
≤0.28 |
≤1.40 |
≤0.030 |
≤0.030 |
- |
- |
- |
- |
- |
|
X56 or L390 |
≤0.28 |
≤1.40 |
≤0.030 |
≤0.030 |
- |
- |
- |
- |
- |
|
X60 or L415 |
≤0.28 |
≤1.40 |
≤0.030 |
≤0.030 |
- |
- |
- |
- |
- |
|
X70 |
≤0.28 |
≤1.40 |
≤0.030 |
≤0.030 |
- |
- |
- |
- |
- |
|
PSL 2 |
BR or L245R |
≤0.24 |
≤1.20 |
≤0.025 |
≤0.015 |
≤0.40 |
c |
c |
≤0.04 |
≤0.25 |
X42R or L290R |
≤0.24 |
≤1.20 |
≤0.025 |
≤0.015 |
≤0.40 |
≤0.06 |
≤0.05 |
≤0.04 |
≤0.25 |
|
BN or L245N |
≤0.24 |
≤1.20 |
≤0.025 |
≤0.015 |
≤0.40 |
c |
c |
≤0.04 |
≤0.25 |
|
X42N or L290N |
≤0.24 |
≤1.30 |
≤0.025 |
≤0.015 |
≤0.40 |
≤0.06 |
≤0.05 |
≤0.04 |
≤0.25 |
|
X46N or L320N |
≤0.24 |
≤1.40 |
≤0.025 |
≤0.015 |
≤0.40 |
≤0.07 |
≤0.05 |
≤0.04 |
≤0.25 |
|
X52N or L360N |
≤0.24 |
≤1.40 |
≤0.025 |
≤0.015 |
≤0.45 |
≤0.10 |
≤0.05 |
≤0.04 |
≤0.25 |
|
X56N or L390N |
≤0.24 |
≤1.40 |
≤0.025 |
≤0.015 |
≤0.45 |
≤0.10 |
≤0.05 |
≤0.04 |
≤0.25 |
|
X60N or L415N |
≤0.24 |
≤1.40 |
≤0.025 |
≤0.015 |
≤0.45 |
≤0.10 |
≤0.05 |
≤0.04 |
- |
|
X65N or L450N |
≤0.24 |
≤1.40 |
≤0.025 |
≤0.015 |
≤0.45 |
≤0.10 |
≤0.05 |
≤0.04 |
- |
|
X70N |
≤0.24 |
≤1.40 |
≤0.025 |
≤0.015 |
≤0.45 |
≤0.10 |
≤0.05 |
≤0.04 |
- |
|
X80 |
≤0.24 |
≤1.40 |
≤0.025 |
≤0.015 |
≤0.45 |
≤0.10 |
≤0.05 |
≤0.04 |
- |
標(biāo)準(zhǔn):
API SPEC 5L--美國(guó)石油學(xué)會(huì)標(biāo)準(zhǔn)
GB/T9711--中國(guó)國(guó)家標(biāo)準(zhǔn)
用途:
用于石油、天然氣工業(yè)中的氧、水、油輸送管
主要生產(chǎn)鋼管牌號(hào):
B、X42、X52、X60、X65、X70 L245 L290 L320 L360 L390 L450 L485
尺寸公差:
鋼管種類 |
鋼管外徑(D) |
鋼管壁厚(S) |
|
|
管體 |
鋼管外徑 (mm) |
允許偏差(mm) |
鋼管外徑(mm) |
允許偏差(mm) |
≥60.3且S<20 |
±0.75% |
≤73.0 |
+15%,-12.5% |
|
≥60.3且S≥20 |
±1.00% |
>73.0且S<20 |
+15%,-12.5% |
|
|
|
>73.0且S≥20 |
+17.5%,-10 |
|