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PRODUCT

25MnG high-pressure boiler tube

brief introduction
Boiler tubes refer to steel pipes with openings at both ends and hollow cross-sections, and their length is relatively large compared to the surrounding area. According to production methods, they can be divided into seamless steel pipes and welded steel pipes. The specifications of steel pipes are represented by external dimensions (such as outer diameter or side length) and wall thickness, and their size range is wide, from small diameter capillary tubes to large-diameter pipes with a diameter of several meters. Steel pipes can be used for pipelines, thermal equipment, mechanical industry, petroleum geological exploration, containers, chemical industry, and special purposes.

Product Description

Production and manufacturing methods:

① Generally, boiler tubes are used at temperatures below 350 ℃, while domestically produced tubes are mainly made of hot-rolled or cold drawn carbon steel tubes of grades 10 and 20.

② High pressure boiler tubes are often subjected to high temperature and high pressure conditions during use. When used as boiler tubes in the presence of high-temperature flue gas and water vapor, the tubes will undergo oxidation and corrosion.

Steel pipes are required to have high durability, high oxidation and corrosion resistance, and good structural stability.

Boiler tube usage:

① General boiler tubes are mainly used to manufacture water-cooled wall tubes, boiling water tubes, superheated steam tubes, superheated steam tubes for locomotive boilers, large and small smoke tubes, and arch brick tubes.

② High pressure boiler tubes are mainly used to manufacture superheater tubes, reheater tubes, air ducts, and main steam tubes for high-pressure and ultra-high pressure boilers. The supply and demand trend in the high-pressure boiler tube industry is generally stable, but the supply and demand situation in various specific sub industries will further differentiate. Industry insiders point out that the most crucial aspect is the use and promotion of new energy-saving and insulation 20g high-pressure boiler tube equipment. New energy-saving 20g high-pressure boiler tube products are gradually increasing in the market, such as green and environmentally friendly coatings, energy-saving and water-saving bathroom products, environmentally friendly stone materials, environmentally friendly external cement foam insulation boards, etc. The prospects of energy-saving and environmentally friendly products in the broad market of 20g high-pressure boiler tube industry are promising.

[1] Related regulations

(1) GB/T5310-2008 Seamless Steel Pipes for High Pressure Boilers. The chemical composition test method shall comply with the relevant parts of GB222-84 and GB223 Chemical Analysis Methods for Steel and Alloy.

(2) The chemical composition inspection of imported boiler steel pipes shall be carried out in accordance with the relevant standards specified in the contract.

Type Of Steel Pipe	Outer Diameter (D)		Steel Pipe Wall Thickness (S)
Cold-Drawn Pipe	Outer Diameter Of Steel Pipe (Mm)	Permissible Deviation (Mm)	Steel Pipe Wall Thickness (Mm)	Permissible Deviation (Mm)
Cold-Drawn Pipe	＞30～50	±0.3	≤30	±10％

Standard	Brand	Tensile Strength （MPa）	Yield Strength （MPa）	Elongation （％）	Hardness
GB3087	10	335～475	≥195	≥24	/
GB3087	20	410～550	≥245	≥20	/
GB5310	20G	410～550	≥245	≥24	/
	20MnG	≥415	≥240	≥22	/
	25MnG	≥485	≥275	≥20	/
	15CrMoG	440～640	≥235	≥21	/
	12Cr2MoG	450～600	≥280	≥20	/
	12Cr1MoVG	470～640	≥255	≥21	/
	12Cr2MoWVTiB	540～735	≥345	≥18	/
	10Cr9Mo1VNb	≥585	≥415	≥20	/
ASME SA210	SA210A-1	≥415	≥255	≥30	≤143HB
ASME SA210	SA210C	≥485	≥275	≥30	≤179HB
ASME SA213	SA213 T11	≥415	≥205	≥30	≤163HB
	SA213 T12	≥415	≥220	≥30	≤163HB
	SA213 T22	≥415	≥205	≥30	≤163HB
	SA213 T23	≥510	≥400	≥20	≤220HB
	SA213 T91	≥585	≥415	≥20	≤250HB
	SA213 T92	≥620	≥440	≥20	≤250HB
DIN17175	ST45.8/Ⅲ	410～530	≥255	≥21	/
	15Mo3	450～600	≥270	≥22	/
	13CrMo44	440～590	≥290	≥22	/
	10CrMo910	480～630	≥280	≥20	/

Standard

Brand

Chemical Composition（％）

GB3087

0.07～0.13

0.17～0.37

0.38～0.65

≤0.030

0.3～0.65

≤0.25

≤0.30

0.17～0.23

0.17～0.37

0.38～0.65

≤0.030

0.3～0.65

≤0.25

≤0.30

GB5310

20G

0.17～0.24

0.17～0.37

0.35～0.65

≤0.030

≤0.25

≤0.15

≤0.20

≤0.25

≤0.08

20MnG

0.17～0.24

0.17～0.37

0.70～1.00

≤0.030

≤0.25

≤0.15

≤0.20

≤0.25

≤0.08

25MnG

0.18～0.24

0.17～0.37

0.80～1.10

≤0.030

≤0.25

≤0.15

≤0.20

≤0.25

≤0.08

15CrMo

0.12～0.18

0.17～0.37

0.40～0.70

≤0.030

0.80～1.10

0.40～0.55

≤0.20

≤0.30

12Cr2MoG

0.08～0.15

≤0.50

0.40～0.70

≤0.030

2.00～2.50

0.90～1.20

≤0.20

≤0.30

12Cr1MoV

0.08～0.15

0.17～0.37

0.40～0.70

≤0.030

0.90～1.20

0.25～0.35

≤0.20

≤0.30

0.15～0.30

12Cr2MoWVTiB

0.08～0.15

0.45～0.75

0.45～0.65

≤0.030

1.60～2.10

0.50～0.65

≤0.20

≤0.30

0.28～0.42

0.30～0.55

0.08～0.15

B 0.002～0.008

10Cr9Mo1VNb

0.08～0.12

0.20～0.50

0.30～0.60

≤0.020

≤0.010

8.00～9.50

0.85～1.05

≤0.20

≤0.40

0.18～0.25

≤0.015

0.06～0.10

0.03～0.07

ASME SA210

SA210A-1

0.13～0.19

≥0.1

0.45～0.65

≤0.030

SA210C

0.18～0.24

≥0.1

0.80～1.10

≤0.030

ASME SA213

SA213 T11

0.05～0.15

0.50～1.0

0.30～0.60

≤0.030

1.00～1.50

0.50～1.00

SA213 T12

0.05～0.15

≤0.50

0.30～0.61

≤0.030

0.80～1.25

0.44～0.65

SA213 T22

0.05～0.15

≤0.50

0.30～0.60

≤0.030

≤0.010

1.90～2.60

0.87～1.13

SA213 T23

0.04～0.10

≤0.50

0.10～0.60

≤0.030

1.90～2.60

0.05～0.30

≤0.030

1.45～1.75

B0.0005～0.006

0.02～0.08

≤0.040

SA213 T91

0.08～0.12

0.20～0.50

0.30～0.60

≤0.020

≤0.010

8.00～9.50

0.85～1.05

≤0.40

0.18～0.25

≤0.015

0.06～0.10

0.03～0.07

SA213 T92

0.07～0.13

≤0.50

0.30～0.60

≤0.020

≤0.010

8.50～9.50

0.30～0.60

≤0.40

0.15～0.25

≤0.015

1.50～2.00

B 0.001～0.006

0.04～0.09

0.03～0.07

DIN 17175

ST45.8/Ⅲ

≤0.21

0.10～0.35

0.40～1.20

≤0.040

15Mo3

0.12～0.20

0.10～0.35

0.40～0.80

≤0.035

0.25～0.35

13CrMo44

0.10～0.18

0.10～0.35

0.40～0.70

≤0.035

0.70～1.10

0.45～0.65

10CrMo910

0.08～0.15

≤0.50

0.30～0.70

≤0.025

≤0.020

2.00～2.50

0.90～1.10

≤0.30

≤0.015

Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
14*3	38*5.5	89*5	133*18	219*16	273*36	356*28	426*12
14*3.5	42*3	89*5.5	159*6	219*18	273*40	356*36	426*13
14*4	42*3.5	89*6	159*6.5	219*20	273*42	377*9	426*14
16*3	42*4	89*7	159*7	219*22	273*45	377*10	426*17
18*2	42*5	89*7.5	159*8	219*24	298.5*36	377*12	426*20
18*3	42*6	89*8	159*9.5	219*25	325*8	377*14	426*22
18*4	42*8	89*9	159*10	219*26	325*9	377*15	426*30
18*5	45*3	89*10	159*12	219*28	325*10	377*16	426*36
19*2	45*4	89*11	159*14	219*30	325*11	377*18	426*40
21*4	45*5	89*12	159*16	219*32	325*12	377*20	426*50
22*2.5	45*6	108*4.5	159*18	219*35	325*13	377*22	457*9.5
22*3	45*7	108*5	159*20	219*38	325*14	377*25	457*14
22*4	48*4	108*6	159*28	273*7	325*15	377*32	457*16
22*5	48*4.5	108*7	168*6	273*8	325*16	377*36	457*19
25*2.5	48*5	108*8	168*7	273*9	325*17	377*40	457*24
25*3	48*6	108*9	168*8	273*9.5	325*18	377*45	457*65
25*4	48*7	108*10	168*9.5	273*10	325*20	377*50	508*13
25*5	48.3*12.5	108*12	168*10	273*11	325*22	406*9.5	508*16
25*5.5	51*3	108*14	168*11	273*12	325*23	406*11	508*20
27*3.5	51*3.5	108*15	168*12	273*13	325*25	406*13	508*22
27*4	51*4	108*16	168*14	273*15	325*28	406*17	558.8*14
27*5	51*5	108*20	168*15	273*16	325*30	406*22	530*13
27*5.5	51*6	114*5	168*16	273*18	325*32	406*32	530*20
28*2.5	57*4	114*6	168*18	273*20	325*36	406*36	570*12.5
28*3	57*5	114*7	168*20	273*22	325*40	406*40	610*13
28*3.5	57*5.5	114*8	168*22	273*25	325*45	406*55	610*18
28*4	57*6	114*8.5	168*25	273*28	356*9.5	406.4*50	610*78
30*2.5	60*4	114*9	168*28	273*30	356*12	406.4*55	624*14.2
32*2.5	60*4	114*10	180*10	273*32	356*15	406*60	824*16.5
32*3	60*5	114*11	194*10	273*35	356*19
32*3.5	60*6	114*12	194*12
32*4	60*7	114*13	194*14
32*4.5	60*8	114*14	194*16
32*5	60*9	114*16	194*18
34*3	60*10	114*18	194*20
34*4	76*4.5	133*5	194*26
34*4.5	76*5	133*6	219*6.5
34*5	76*6	133*7	219*7
34*6.5	76*7	133*8	219*8
38*3	76*8	133*10	219*9
38*3.5	76*9	133*12	219*10
38*4	76*10	133*13	219*12
38*4.5	89*4	133*14	219*13
38*5	89*4.5	133*16	219*14

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Company Profile

Senxin (Shandong) Steel Group Co., Ltd. is located in Jinan, "the capital of Spring City", with a registered capital of 88 million yuan and a total area of 380,000 square meters. It is a large-scale industrial and trade company specializing in the sales and manufacturing of carbon steel, galvanized and color coating. In 2016, it passed the 5A enterprise certification, established a foreign trade company in 2018, and established the "Senxin" business department in 2023, focusing on exports. As a leading enterprise in the industry, the company has established long-term cooperative partnership with many enterprises at home and abroad in line with the concept of "serious and responsible, sincere and win-win". It provides strong support for the development of the global industry.

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