2019 wholesale price China Torich ASTM A519 20crmo 20cr Seamless Alloy Steel Pipe
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Overview

Application

It Is Mainly Used for mechanical and used to make gas cylinders.include carbon and alloy steel seamless mechanical tubing,and covers both seamless hot-finished mechanical tubing and seamless cold-finished mechanical tubing in sizes up to and including 12 3⁄4 in. (323.8 mm) outside diameter for round tubes with wall thicknesses as required.

Main Grade

1018,1026,8620,4130,4140

Chemical Component

TABLE 1  Chemical Requirements of Low-Carbon Steels

Grade Chemical Composition Limits, %
Designation CarbonA ManganeseB Phosphorus,B Sulfur,B
max max
MT X 1015 0.10–0.20 0.60–0.90 0.04 0.05
MT 1010 0.05–0.15 0.30–0.60 0.04 0.05
MT 1015 0.10–0.20 0.30–0.60 0.04 0.05
MT 1020 0.15–0.25 0.30–0.60 0.04 0.05
MT X 1020 0.15–0.25 0.70–1.00 0.04 0.05

TABLE 2  Chemical Requirements of Other Carbon SteelsB Limits apply to heat analysis; except as required by 6.1, product analyses are subject to the applicable additional tolerances given in Table 5.

Grade Chemical Composition Limits, %A
Designation
Carbon Manganese Phosphorus, Sulfur,
max max
1008 0.10 max 0.30–0.50 0.04 0.05
1010 0.08–0.13 0.30–0.60 0.04 0.05
1012 0.10–0.15 0.30–0.60 0.04 0.05
1015 0.13–0.18 0.30–0.60 0.04 0.05
1016 0.13–0.18 0.60–0.90 0.04 0.05
1017 0.15–0.20 0.30–0.60 0.04 0.05
1018 0.15–0.20 0.60–0.90 0.04 0.05
1019 0.15–0.20 0.70–1.00 0.04 0.05
1020 0.18–0.23 0.30–0.60 0.04 0.05
1021 0.18–0.23 0.60–0.90 0.04 0.05
1022 0.18–0.23 0.70–1.00 0.04 0.05
1025 0.22–0.28 0.30–0.60 0.04 0.05
1026 0.22–0.28 0.60–0.90 0.04 0.05
1030 0.28–0.34 0.60–0.90 0.04 0.05
1035 0.32–0.38 0.60–0.90 0.04 0.05
1040 0.37–0.44 0.60–0.90 0.04 0.05
1045 0.43–0.50 0.60–0.90 0.04 0.05
1050 0.48–0.55 0.60–0.90 0.04 0.05
1518 0.15–0.21 1.10–1.40 0.04 0.05
1524 0.19–0.25 1.35–1.65 0.04 0.05
1541 0.36–0.44 1.35–1.65 0.04 0.05

A The ranges and limits given in this table apply to heat analysis; except as required by 6.1, product analyses are subject to the applicable additional toler-ances given in Table Number 5.

TABLE 3  Chemical Requirements for Alloy Steels
NOTE 1—The ranges and limits in this table apply to steel not exceeding 200 in.2 (1290 cm2) in cross-sectional area.
NOTE 2—Small quantities of certain elements are present in alloy steels which are not specified or required. These elements are considered as incidental
and may be present to the following maximum amounts: copper, 0.35 %; nickel, 0.25 %; chromium, 0.20 %; molybdenum, 0.10 %.
NOTE 3—The ranges and limits given in this table apply to heat analysis; except as required by 6.1, product analyses are subject to the applicable
additional tolerances given in Table Number 5.
 
GradeA,B Chemical Composition Limits, %
Designa-
Carbon Manganese Phospho- Sulfur,C,D Silicon Nickel Chromium Molybde-
tion
rus,Cmax max num
1330 0.28–0.33 1.60–1.90 0.04 0.04 0.15–0.35 ... ... ...
1335 0.33–0.38 1.60–1.90 0.04 0.04 0.15–0.35 ... ... ...
1340 0.38–0.43 1.60–1.90 0.04 0.04 0.15–0.35 ... ... ...
1345 0.43–0.48 1.60–1.90 0.04 0.04 0.15–0.35 ... ... ...
3140 0.38–0.43 0.70–0.90 0.04 0.04 0.15–0.35 1.10–1.40 0.55–0.75 ...
E3310 0.08–0.13 0.45–0.60 0.025 0.025 0.15–0.35 3.25–3.75 1.40–1.75 ...
4012 0.09–0.14 0.75–1.00 0.04 0.04 0.15–0.35 ... ... 0.15–0.25
4023 0.20–0.25 0.70–0.90 0.04 0.04 0.15–0.35 ... ... 0.20–0.30
4024 0.20–0.25 0.70–0.90 0.04 0.035−0.050 0.15–0.35 ... ... 0.20–0.30
4027 0.25–0.30 0.70–0.90 0.04 0.04 0.15–0.35 ... ... 0.20–0.30
4028 0.25–0.30 0.70–0.90 0.04 0.035−0.050 0.15–0.35 ... ... 0.20–0.30
4037 0.35–0.40 0.70–0.90 0.04 0.04 0.15–0.35 ... ... 0.20–0.30
4042 0.40–0.45 0.70–0.90 0.04 0.04 0.15–0.35 ... ... 0.20–0.30
4047 0.45–0.50 0.70–0.90 0.04 0.04 0.15–0.35 ... ... 0.20–0.30
4063 0.60–0.67 0.75–1.00 0.04 0.04 0.15–0.35 ... ... 0.20–0.30
4118 0.18–0.23 0.70–0.90 0.04 0.04 0.15–0.35 ... 0.40–0.60 0.08–0.15
4130 0.28–0.33 0.40–0.60 0.04 0.04 0.15–0.35 ... 0.80–1.10 0.15–0.25
4135 0.32–0.39 0.65–0.95 0.04 0.04 0.15–0.35 ... 0.80–1.10 0.15–0.25
4137 0.35–0.40 0.70–0.90 0.04 0.04 0.15–0.35 ... 0.80–1.10 0.15–0.25
4140 0.38–0.43 0.75–1.00 0.04 0.04 0.15–0.35 ... 0.80–1.10 0.15–0.25
4142 0.40–0.45 0.75–1.00 0.04 0.04 0.15–0.35 ... 0.80–1.10 0.15–0.25
4145 0.43–0.48 0.75–1.00 0.04 0.04 0.15–0.35 ... 0.80–1.10 0.15–0.25
4147 0.45–0.50 0.75–1.00 0.04 0.04 0.15–0.35 ... 0.80–1.10 0.15–0.25
4150 0.48–0.53 0.75–1.00 0.04 0.04 0.15–0.35 ... 0.80–1.10 0.15–0.25
4320 0.17–0.22 0.45–0.65 0.04 0.04 0.15–0.35 1.65–2.00 0.40–0.60 0.20–0.30
4337 0.35–0.40 0.60–0.80 0.04 0.04 0.15–0.35 1.65–2.00 0.70–0.90 0.20–0.30
E4337 0.35–0.40 0.65–0.85 0.025 0.025 0.15–0.35 1.65–2.00 0.70–0.90 0.20–0.30
4340 0.38–0.43 0.60–0.80 0.04 0.04 0.15–0.35 1.65–2.00 0.70–0.90 0.20–0.30
E4340 0.38–0.43 0.65–0.85 0.025 0.025 0.15–0.35 1.65–2.00 0.70–0.90 0.20–0.30
4422 0.20–0.25 0.70–0.90 0.04 0.04 0.15–0.35 ... ... 0.35–0.45
4427 0.24–0.29 0.70–0.90 0.04 0.04 0.15–0.35 ... ... 0.35–0.45
4520 0.18–0.23 0.45–0.65 0.04 0.04 0.15–0.35 ... ... 0.45–0.60
4615 0.13–0.18 0.45–0.65 0.04 0.04 0.15–0.35 1.65–2.00 ... 0.20–0.30
4617 0.15–0.20 0.45–0.65 0.04 0.04 0.15–0.35 1.65–2.00 ... 0.20–0.30
4620 0.17–0.22 0.45–0.65 0.04 0.04 0.15–0.35 1.65–2.00 ... 0.20–0.30
4621 0.18–0.23 0.70–0.90 0.04 0.04 0.15–0.35 1.65–2.00 ... 0.20–0.30
4718 0.16–0.21 0.70–0.90 0.04 0.04 0.15–0.35 0.90–1.20 0.35–0.55 0.30–0.40
4720 0.17–0.22 0.50–0.70 0.04 0.04 0.15–0.35 0.90–1.20 0.35–0.55 0.15–0.25
4815 0.13–0.18 0.40–0.60 0.04 0.04 0.15–0.35 3.25–3.75 ... 0.20–0.30
4817 0.15–0.20 0.40–0.60 0.04 0.04 0.15–0.35 3.25–3.75 ... 0.20–0.30
4820 0.18–0.23 0.50–0.70 0.04 0.04 0.15–0.35 3.25–3.75 ... 0.20–0.30
5015 0.12–0.17 0.30–0.50 0.04 0.04 0.15–0.35 ... 0.30–0.50 ...
5046 0.43–0.50 0.75–1.00 0.04 0.04 0.15–0.35 ... 0.20–0.35 ...
5115 0.13–0.18 0.70–0.90 0.04 0.04 0.15–0.35 ... 0.70–0.90 ...
5120 0.17–0.22 0.70–0.90 0.04 0.04 0.15–0.35 ... 0.70–0.90 ...
5130 0.28–0.33 0.70–0.90 0.04 0.04 0.15–0.35 ... 0.80–1.10 ...
5132 0.30–0.35 0.60–0.80 0.04 0.04 0.15–0.35 ... 0.75–1.00 ...
5135 0.33–0.38 0.60–0.80 0.04 0.04 0.15–0.35 ... 0.80–1.05 ...
5140 0.38–0.43 0.70–0.90 0.04 0.04 0.15–0.35 ... 0.70–0.90 ...
5145 0.43–0.48 0.70–0.90 0.04 0.04 0.15–0.35 ... 0.70–0.90 ...
5147 0.46–0.51 0.70–0.95 0.04 0.04 0.15–0.35 ... 0.85–1.15 ...
5150 0.48–0.53 0.70–0.90 0.04 0.04 0.15–0.35 ... 0.70–0.90 ...
5155 0.51–0.59 0.70–0.90 0.04 0.04 0.15–0.35 ... 0.70–0.90 ...
5160 0.56–0.64 0.75–1.00 0.04 0.04 0.15–0.35 ... 0.70–0.90 ...
52100E 0.93–1.05 0.25–0.45 0.025 0.015 0.15–0.35 0.25 max 1.35–1.60 0.10 max
E50100 0.98–1.10 0.25–0.45 0.025 0.025 0.15–0.35 ... 0.40–0.60 ...
E51100 0.98–1.10 0.25–0.45 0.025 0.025 0.15–0.35 ... 0.90–1.15 ...
E52100 0.98–1.10 0.25–0.45 0.025 0.025 0.15–0.35 ... 1.30–1.60 ...
Vanadium
6118 0.16–0.21 0.50–0.70 0.04 0.04 0.15–0.35 ... 0.50–0.70 0.10–0.15
6120 0.17–0.22 0.70–0.90 0.04 0.04 0.15–0.35 ... 0.70–0.90 0.10 min
6150 0.48–0.53 0.70–0.90 0.04 0.04 0.15–0.35 ... 0.80–1.10 0.15 min
Aluminum Molybdenum
E7140 0.38–0.43 0.50–0.70 0.025 0.025 0.15–0.40 0.95–1.30 1.40–1.80 0.30–0.40
Nickel
8115 0.13–0.18 0.70–0.90 0.04 0.04 0.15–0.35 0.20–0.40 0.30–0.50 0.08–0.15
8615 0.13–0.18 0.70–0.90 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8617 0.15–0.20 0.70–0.90 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8620 0.18–0.23 0.70–0.90 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8622 0.20–0.25 0.70–0.90 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8625 0.23–0.28 0.70–0.90 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8627 0.25–0.30 0.70–0.90 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8630 0.28–0.33 0.70–0.90 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8637 0.35–0.40 0.75–1.00 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8640 0.38–0.43 0.75–1.00 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8642 0.40–0.45 0.75–1.00 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8645 0.43–0.48 0.75–1.00 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8650 0.48–0.53 0.75–1.00 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8655 0.51–0.59 0.75–1.00 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8660 0.55–0.65 0.75–1.00 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8720 0.18–0.23 0.70–0.90 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.20–0.30
8735 0.33–0.38 0.75–1.00 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.20–0.30
8740 0.38–0.43 0.75–1.00 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.20–0.30
8742 0.40–0.45 0.75–1.00 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.20–0.30
8822 0.20–0.25 0.75–1.00 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.30–0.40
9255 0.51–0.59 0.60–0.80 0.04 0.04 1.80–2.20 ... 0.60–0.80 ...
9260 0.56–0.64 0.75–1.00 0.04 0.04 1.80–2.20 ... ... ...
9262 0.55–0.65 0.75–1.00 0.04 0.04 1.80–2.20 ... 0.25–0.40 ...
E9310 0.08–0.13 0.45–0.65 0.025 0.025 0.15–0.35 3.00–3.50 1.00–1.40 0.08–0.15
9840 0.38–0.42 0.70–0.90 0.04 0.04 0.15–0.35 0.85–1.15 0.70–0.90 0.20–0.30
9850 0.48–0.53 0.70–0.90 0.04 0.04 0.15–0.35 0.85–1.15 0.70–0.90 0.20–0.30
50B40 0.38–0.42 0.75–1.00 0.04 0.04 0.15–0.35 ... 0.40–0.60 ...
50B44 0.43–0.48 0.75–1.00 0.04 0.04 0.15–0.35 ... 0.40–0.60 ...
50B46 0.43–0.50 0.75–1.00 0.04 0.04 0.15–0.35 ... 0.20–0.35 ...
50B50 0.48–0.53 0.74–1.00 0.04 0.04 0.15–0.35 ... 0.40–0.60 ...
50B60 0.55–0.65 0.75–1.00 0.04 0.04 0.15–0.35 ... 0.40–0.60 ...
51B60 0.56–0.64 0.75–1.00 0.04 0.04 0.15–0.35 ... 0.70–0.90 ...
81B45 0.43–0.48 0.75–1.00 0.04 0.04 0.15–0.35 0.20–0.40 0.35–0.55 0.08–0.15
86B45 0.43–0.48 0.75–1.00 0.04 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
94B15 0.13–0.18 0.75–1.00 0.04 0.04 0.15–0.35 0.30–0.60 0.30–0.50 0.08–0.15
94B17 0.15–0.20 0.75–1.00 0.04 0.04 0.15–0.35 0.30–0.60 0.30–0.50 0.08–0.15
94B30 0.28–0.33 0.75–1.00 0.04 0.04 0.15–0.35 0.30–0.60 0.30–0.50 0.08–0.15
94B40 0.38–0.43 0.75–1.00 0.04 0.04 0.15–0.35 0.30–0.60 0.30–0.50 0.08–0.15
B Grades shown in this table with the letter B, such as 50B40, can be expected to have 0.0005 % minimum boron control. A  Grades shown in this table with prefix letter E generally are manufactured by the basic-electric-furnace process. All others are normally manufactured by the basic-open-hearth process but may be manufactured by the basic-electric-furnace process with adjustments in phosphorus and sulfur.

 

C  The phosphorus sulfur limitations for each process are as follows:

Basic electric furnace         0.025 max %         Acid electric furnace          0.050 max %

Basic open hearth            0.040 max %          Acid open hearth             0.050 max %

D Minimum and maximum sulfur content indicates resulfurized steels.

EThe purchaser may specify the following maximum amounts: copper, 0.30 %; aluminum, 0.050 %; and oxygen, 0.0015 %.

 

Mechanical Property

Typical Tensile Properties, Hardness and Thermal Condition for some of the More Common Grades of Carbon and Alloy Steels

  CW—Cold Worked SR—Stress Relieved A—Annealed N—NormalizedA       The following are the symbol definitions for the various conditions: HR—Hot Rolle
Grade Condi- Ultimate Yield Elongation Rockwell,
Desig- tionA Strength, Strength, in 2 in. or Hardness
nation 50 mm, % B Scale
ksi MPa ksi MPa
1020 HR 50 345 32 221 25 55
CW 70 483 60 414 5 75
SR 65 448 50 345 10 72
A 48 331 28 193 30 50
N 55 379 34 234 22 60
1025 HR 55 379 35 241 25 60
CW 75 517 65 448 5 80
SR 70 483 55 379 8 75
A 53 365 30 207 25 57
N 55 379 36 248 22 60
1035 HR 65 448 40 276 20 72
CW 85 586 75 517 5 88
SR 75 517 65 448 8 80
A 60 414 33 228 25 67
N 65 448 40 276 20 72
1045 HR 75 517 45 310 15 80
CW 90 621 80 552 5 90
SR 80 552 70 483 8 85
A 65 448 35 241 20 72
N 75 517 48 331 15 80
1050 HR 80 552 50 345 10 85
SR 82 565 70 483 6 86
A 68 469 38 262 18 74
N 78 538 50 345 12 82
1118 HR 50 345 35 241 25 55
CW 75 517 60 414 5 80
SR 70 483 55 379 8 75
A 50 345 30 207 25 55
N 55 379 35 241 20 60
1137 HR 70 483 40 276 20 75
CW 80 552 65 448 5 85
SR 75 517 60 414 8 80
A 65 448 35 241 22 72
N 70 483 43 296 15 75
4130 HR 90 621 70 483 20 89
SR 105 724 85 586 10 95
A 75 517 55 379 30 81
N 90 621 60 414 20 89
4140 HR 120 855 90 621 15 100
SR 120 855 100 689 10 100
A 80 552 60 414 25 85
N 120 855 90 621 20 100
d

Tolerance

Outside Diameter Tolerances for Round Hot-Finished TubingA,B,C

 
Outside Diameter Size Range, Outside Diameter Tolerance, in. (mm)
in. (mm)

Over

Under
Up to 2.999 (76.17)

0.020 (0.51)

0.020 (0.51)
3.000–4.499 (76.20–114.27)

0.025 (0.64)

0.025 (0.64)
4.500–5.999 (114.30–152.37)

0.031 (0.79)

0.031 (0.79)
6.000–7.499 (152.40–190.47)

0.037 (0.94)

0.037 (0.94)
7.500–8.999 (190.50–228.57)

0.045 (1.14)

0.045 (1.14)
9.000–10.750 (228.60–273.05)

0.050 (1.27)

0.050 (1.27)
  A Diameter tolerances are not applicable to normalized and tempered or quenched and tempered conditions. B The common range of sizes of hot finished tubes is 11⁄2 in. (38.1 mm) to 103⁄4 in. (273.0 mm) outside diameter with wall thickness at least 3 % or more of outside diameter, but not less than 0.095 in. (2.41 mm). C Larger sizes are available; consult manufacturer for sizes and tolerances.  

Wall Thickness Tolerances for Round Hot-Finished

Tubing

   
Wall Thickness

Wall Thickness Tolerance,A percent Over
Range as Percent

and Under Nominal
of Outside

Outside

Outside

Outside
Diameter

Diameter

Diameter

Diameter

2.999 in.

3.000 in.

6.000 in.

(76.19 mm)

(76.20 mm)

(152.40 mm)

and smaller

to 5.999 in.

to 10.750 in.

(152.37 mm)

(273.05 mm)
Under 15

12.5

10.0

10.0
15 and over

10.0

7.5

10.0
A Wall thickness tolerances may not be applicable to walls 0.199 in. (5.05 mm) and less; consult manufacturer for wall tolerances on such tube sizes. a more important dimension, then cold-worked tubing should be specified to inside diameter and wall thickness or outside diameter and inside diameter. Rough-Turned Mechanical Tubing—Variation in outside diameter and wall thickness shall not exceed the tolerance in Table. Table  covers tolerances as applied to outside diameter and wall thickness and applies to the specified size. Ground Mechanical Tubing—Variation in outside diam-eter shall not exceed the tolerances in Table. This product is normally produced from a cold-worked tube. Lengths—Mechanical tubing is commonly furnished in mill lengths, 5 ft (1.5 m) and over. Definite cut lengths are furnished when specified by the purchaser. Length tolerances are shown in Table . Straightness—The straightness tolerances for seamless round tubing shall not exceed the amounts shown in Table.  

Test Requirement

1.Hardness Test When hardness limits are required, the manufacturer shall be consulted. Typical hardnesses are listed in Table .When specified, the hardness test shall be performed on 1 % of the tubes. 2.Tension Tests When tensile properties are required, the manufacturer shall be consulted. Typical tensile properties for some of the more common grades and thermal conditions are listed in table. 3.Nondestructive Tests Various types of nondestructive ultrasonic or electromagnetic tests are available. The test to be used and the inspection limits shall be established by manufacturer and purchaser agreement. 4.Flaring Test When there are special requirements for steel cleanliness, the methods of test and limits of acceptance shall be established by manufacturer and purchaser agreement.

Product Detail

Mechanical/Chemical&Fertilizer Pipes

GB/T8162-2008

ASTM A519-2006

BS EN 10210-1-2006

ASTM A53/A53M-2012

GB9948-2006

GB6479-2013

GB/T 17396-2009

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