Alloy Seamless Steel Pipe from China manufacturer - Orich Metal Technology Co., Ltd.

Product Description of Alloy Seamless Steel Pipe

Alloy seamless steel pipe is a kind of seamless steel pipe, with a hollow section and no joints around it. And its performance is much higher than that of ordinary seamless steel pipe because it contains more Cr. Its high-temperature resistance, low-temperature resistance, and corrosion resistance are better than those of other seamless steel pipes. Compared with solid steel, such as round steel, alloy seamless steel pipe is lighter in weight and is an economical section steel widely used in the manufacture of structural and mechanical parts. The features of the alloy seamless steel pipe are seamless structure, adding alloy elements to strengthen.

Chemical Compositions of alloy seamless steel pipe:

C, %

Mn, %

P, %

S, %

Si, %

Cr, %

Mo, %

V, %

N, %

Ni, %

Al, %

Nb, %

W, %

B, %

0.07-0.13

0.3-0.6

0.02 max

0.01 max

0.5 max

8.5-9.5

0.3-0.6

0.15-0.25

0.03-0.07

0.4 max

0.04 max

0.04-0.09

1.5-2.0

0.001-0.006

Mechanical Properties of alloy seamless steel pipe:

Tensile Strength , MPa	Yield Strength, MPa	Elongation, %	Hardness, HB
620 min	440 min	20 min	250 max

Quality Testing & Inspection

Inspection Method	Purpose
PMI (Positive Material Identification)	Verify alloy composition
Ultrasonic Examination (UT)	Detect internal flaws
Eddy Current Testing (ECT)	Surface defect detection
Hydrostatic Testing	Pressure integrity verification
Chemical Analysis	Verify elemental composition
Mechanical Testing	Tensile, yield, elongation validation

Certifications Available: API 5L/5CT, ISO, PED, MTC (Mill Test Certificate)

Application of alloy seamless steel pipe

1. Oil and gas industry.

2. Chemical industry and energy.

3. Machinery manufacturing and automobiles.

4. Aerospace and military industry.

5. Wind power tower.

6. Hydrogen energy storage.

Specification of Alloy Seamless Steel Pipe

Outside Diameter & Tolerance of alloy seamless steel pipe :

ASTM A450	Hot rolled	Outside Diameter, mm	Tolerance, mm
		OD≤101.6	+0.4/-0.8
		101.6＜OD≤190.5	+0.4/-1.2
		190.5＜OD≤228.6	+0.4/-1.6
	Cold Drawn	Outside Diameter, mm	Tolerance, mm
		OD＜25.4	±0.10
		25.4≤OD≤38.1	±0.15
		38.1＜OD＜50.8	±0.20
		50.8≤OD＜63.5	±0.25
		63.5≤OD＜76.2	±0.30
		76.2≤OD≤101.6	±0.38
		101.6＜OD≤190.5	+0.38/-0.64
		190.5＜OD≤228.6	+0.38/-1.14
ASTM A530 & ASTM A335	NPS	Outside Diameter, inch	Tolerance, mm
		1/8≤OD≤1-1/2	±0.40
		1-1/2＜OD≤4	±0.79
		4＜OD≤8	+1.59/-0.79
		8＜OD≤12	+2.38/-0.79
		OD>12	±1%

Wall thickness & Tolerance of alloy seamless steel pipe :

ASTM A450	Hot rolled	Outside Diameter, mm	Tolerance, %
		OD≤101.6, WT≤2.4	+40/-0
		OD≤101.6, 2.4＜WT≤3.8	+35/-0
		OD≤101.6, 3.8＜WT≤4.6	+33/-0
		OD≤101.6, WT>4.6	+28/-0
		OD>101.6, 2.4＜WT≤3.8	+35/-0
		OD>101.6, 3.8＜WT≤4.6	+33/-0
		OD>101.6, WT>4.6	+28/-0
	Cold Drawn	Outside Diameter, mm	Tolerance, %
		OD≤38.1	+20/-0
		OD>38.1	+22/-0
ASTM A530	NPS	Outside Diameter, inch	Tolerance, %
		1/8≤OD≤2-1/2	+20.0/-12.5
		3≤OD≤18, WT/OD≤5%	+22.5/-12.5
		3≤OD≤18, WT/OD>5%	+15.0/-12.5
		OD≥20, WT/OD≤5%	+22.5/-12.5
		OD≥20, WT/OD>5%	+15.0/-12.5

Standard of Alloy Seamless Steel Pipe

Grade	UNS	C≤	Mn	P≤	S≤	Si≤	Cr	Mo
P1	K11522	0.10~0.20	0.30~0.80	0.025	0.025	0.10~0.50	-	0.44~0.65
P2	K11547	0.10~0.20	0.30~0.61	0.025	0.025	0.10~0.30	0.50~0.81	0.44~0.65
P5	K41545	0.15	0.30~0.60	0.025	0.025	0.50	4.00~6.00	0.44~0.65
P5b	K51545	0.15	0.30~0.60	0.025	0.025	1.00~2.00	4.00~6.00	0.44~0.65
P5c	K41245	0.12	0.30~0.60	0.025	0.025	0.50	4.00~6.00	0.44~0.65
P9	S50400	0.15	0.30~0.60	0.025	0.025	0.50~1.00	8.00~10.00	0.44~0.65
P11	K11597	0.05~0.15	0.30~0.61	0.025	0.025	0.50~1.00	1.00~1.50	0.44~0.65
P12	K11562	0.05~0.15	0.30~0.60	0.025	0.025	0.50	0.80~1.25	0.44~0.65
P15	K11578	0.05~0.15	0.30~0.60	0.025	0.025	1.15~1.65	-	0.44~0.65
P21	K31545	0.05~0.15	0.30~0.60	0.025	0.025	0.50	2.65~3.35	0.80~1.60
P22	K21590	0.05~0.15	0.30~0.60	0.025	0.025	0.50	1.90~2.60	0.87~1.13
P91	K91560	0.08~0.12	0.30~0.60	0.020	0.010	0.20~0.50	8.00~9.50	0.85~1.05
P92	K92460	0.07~0.13	0.30~0.60	0.020	0.010	0.50	8.50~9.50	0.30~0.60