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CS SEAMLESS RECTANGULAR PIPE ASTM A 106 GR. A / CARBON STEEL SEAMLESS RECTANGULAR PIPE ASTM A 106 GR. A


ASTM A106 standard specifications

ASTM A106 is the standard specification for seamless carbon steel pipe applied for high temperature services.



SPECIFICATIONS

Dimensions Schedule Range

The standard covers pipe sizes in NPS (National Standard Straight) from 10.3mm DN6 – 1219mm DN1200 (1/8 inch to 48 inch), complied with ASME B 36.10M. But other sizes out of this B36.10 also could apply the A106 standard.

Raw materials

ASTM A106 standard raw material is carbon steel, it shall be applicable for bending, flanging or similar forming processes.

Test Methods

The test methods for the ASTM A106 A, B, C are the flattening tests, hydrostatic test, nondestructive electric test, Ultrasonic test, eddy current test, flux leakage test, these test procedures shall be notified or discussed with client to confirm what kind of test will be applied.

Chemical composition in %

Carbon (C) Max For Grade A 0.25, For Grade B 0.30, Grade C 0.35
Manganese (Mn): 0.27-0.93, 0.29-1.06
Sulfur (S) Max: ≤ 0.035
Phosphorus (P) : ≤ 0.035
Silicon (Si) Min : ≥0.10
Chrome (Cr): ≤ 0.40
Copper (Cu): ≤ 0.40
Molybdenum (Mo): ≤ 0.15
Nickel (Ni): ≤ 0.40
Vanadium (V): ≤ 0.08

Please note:
For each reduction of 0.01% for maximum carbon element, an increase of 0.06% manganese above the specified value shall be permitted, and up to maximum of 1.35%.
Elements Cr, Cu, Mo, Ni, V combined shall not exceed 1%.

 

 

                                                                                                   

 

 

CHEMICAL REQUIREMENTS ASTM A106 [ GRADE A,B,C ] IN %

 

GRADE

A

B

C

Carbon, max

0.25 (1)

0.30 (2)

0.35 (2)

Manganese

0.27-0.93

0.29-1.06

0.29-1.06

Phosphorus, max

0.035

0.035

0.035

Sulfur, max

0.035

0.035

0.035

Silicon, min

0.10

0.10

0.10

Chrome, max (3)

0.40

0.40

0.40

Copper, max (3)

0.40

0.40

0.40

Molybdenum, max (3)

0.15

0.15

0.15

Nickel, max (3)

0.40

0.40

0.40

Vanadium, max (3)

0.08

0.08

0.08

(1) For each reduction of 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum will be permitted up to a maximum of 1.35%.

(2)Unless otherwise specified by the purchaser, for each reduction of 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum will be permitted up to a maximum of 1.65%.

(3) These five elements combined shall not exceed 1%.

 

                        CHEMICAL REQUIREMENTS ASTM A106 [ GRADE A,B,C ] IN %

GRADE

C % (MAX)

MN % (MAX)

P %(MAX)

S %(MAX)

Si %(MIN)

CH%(MAX)

Ni%(MAX)

VAN%(MAX)

A

0.25 (1)

0.27-0.93

0.29-1.06

0.035

0.10

0.40

0.40

0.08

B

0.30 (2)

0.29-1.06

0.035

0.035

0.10

0.40

0.40

0.08

C

0.35 (2)

0.29-1.06

0.035

0.035

0.10

0.40

0.40

0.08

 

(1) For each reduction of 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum will be permitted up to a maximum of 1.35%.

(2)Unless otherwise specified by the purchaser, for each reduction of 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum will be permitted up to a maximum of 1.65%.

(3) These five elements combined shall not exceed 1%.