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  • Alloy Steel Tube
  • Alloy Steel Tube
  • Alloy Steel Tube
  • Alloy Steel Tube
  • Alloy Steel Tube

Alloy Steel Tube

Category : Seamless Steel Pipe
Views : 388
It is to manufacture wall panel, economizer, reheater, superheater and steam pipeline of boilers.
Low temperature resistant alloy tubes are seamless products,mianly the finished steel pipe has good impact toughness in low temperature environment (usually below -45℃).
The use of low sulfur and low phosphorus high purity steel and calcification treatment can effectively reduce the low temperature brittleness of steel and enhance the impact toughness of the product.

Application: In Refineries, Power Plants, Boilers, Heat Exchangers, Condensers etc.
Pipe Standard: ASME SA 335/ASTM A333/ASME SA333  
Size: OD: 73-630mm / WT: 6-35mm / Length: Single Random, Double Random, Cut Length
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Product Description

It is to manufacture wall panel, economizer, reheater, superheater and steam pipeline of boilers.

Low temperature resistant alloy tubes are seamless products,mianly the finished steel pipe has good impact toughness in low temperature environment (usually below -45℃).

The use of low sulfur and low phosphorus high purity steel and calcification treatment can effectively reduce the low temperature brittleness of steel and enhance the impact toughness of the product.


Product

Alloy Steel Tube

Application

In Refineries, Power Plants, Boilers, Heat Exchangers, Condensers etc.

Pipe Standard

ASME SA 335/ASTM A333/ASME SA333 

Size

OD: 73-630mm

WT: 6-35mm

Length: Single Random, Double Random, Cut Length


ASME SA 335  American society of mechanical engineers;

ASTM A333 is for Seamless and Welded Steel Pipe for Low-Temperature Service and Other Applications with Required Notch Toughness


Grade

UNS Designation

Composition, %

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

P9

S50400

≤0.15

0.30–0.60

≤0.025

≤0.025

0.25–1.00

8.00–10.00

0.90–1.10

P11

K11597

0.05–0.15

0.30–0.60

≤0.025

≤0.025

0.50–1.00

1.00–1.50

0.44–0.65

P12

K11562

0.05–0.15

0.30–0.61

≤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

0.80–1.06

P22

K21590

0.05–0.15

0.30–0.60

≤0.025

≤0.025

≤0.50

1.90–2.60

0.87–1.13

P23

K41650

0.04–0.10

0.10–0.60

≤0.030

≤0.010

≤0.50

1.90–2.60

0.05–0.30

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


Grade

Composition, %

C

Mn

P

S

Si

Cr

Ni

Grade 1

≤0.30

0.40-1.06

≤0.025

≤0.025

-

-

-

Grade 3

≤0.19

0.31-0.64

≤0.025

≤0.025

0.18-0.37

-

3.18-3.82

Grade 4

≤0.12

0.50-1.05

≤0.025

≤0.025

0.18-0.37

0.44-1.01

0.47-0.98

Grade 6

≤0.30

0.29-1.06

≤0.025

≤0.025

≥0.10

-

-

Grade 7

≤0.19

≤0.90

≤0.025

≤0.025

0.13-0.32

-

2.03-2.57

Grade 8

≤0.13

≤0.90

≤0.025

≤0.025

0.13-0.32

-

8.40-9.60

Grade 9

≤0.20

0.40-1.06

≤0.025

≤0.025

-

-

1.60-2.24

Grade 10

≤0.20

1.15-1.50

≤0.030

≤0.015

0.10-0.35

≤0.15

≤0.25

Grade 11

≤0.10

≤0.60

≤0.025

≤0.025

≤0.35

≤0.50

35.0-37.0

*For Grade 1 and 6, each reduction of 0.01% C below 0.30%, an increase of 0.05 % Mn above 1.06 % would be permitted to a max. of 1.35%.

*For Grade 6, the limit for columbium may be increased up to 0.05 % on heat analysis and 0.06 % on product analysis.

*Generally, the carbon equivalent C.E = [C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15] shall not exceed 0.43% by heat analysis.

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