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astm a335 steel pipe chemical composition:
material |
c |
si |
mn |
p |
s |
mo |
cr |
|
% |
% |
% |
% |
max |
% |
max |
a335 grade p1 |
0.10---0.20 |
0.10---0.50 |
0.30---0.80 |
0.025 |
0.025 |
0.440.65 |
|
a335 grade p5 |
max 0.15 |
max 0.50 |
0.30---0.60 |
0.025 |
0.025 |
0.450.65 |
4.006.00 |
a335 grade p11 |
0.05---0.15 |
0.5---1.0 |
0.30---0.60 |
0.025 |
0.025 |
0.450.65 |
1.001.50 |
a335 grade p12 |
0.05---0.15 |
max 0.50 |
0.30---0.61 |
0.025 |
0.025 |
0.450.65 |
0.801.25 |
a335 grade p22 |
0.05---0.15 |
max 0.50 |
0.30---0.60 |
0.025 |
0.025 |
0.871.13 |
1.902.60 |
astm a335 steel pipe mechanical properties:
material |
tensile n/mm2 |
strength min n/mm2 |
yield %min |
a335 grade p1 |
min380 |
205 |
30 |
a335 grade p5 |
min415 |
205 |
30 |
a335 grade p11 |
min415 |
205 |
30 |
a335 grade p12 |
min415 |
205 |
30 |
a335 grade p22 |
min415 |
205 |
30 |
stm a335 steel pipe may be either hot finished or cold drawn with the finishing heat treatment noted below.
astm a335 grade |
heat treatment type |
normalizing temperature range f [c] |
subcritical annealing or tempering |
p5 (b,c) |
full or isothermal anneal |
|
|
|
normalize and temper |
- |
1250 [675] |
|
subcritical anneal (p5c only) |
- |
1325 - 1375 [715 - 745] |
p9 |
full or isothermal anneal |
|
|
|
normalize and temper |
- |
1250 [675] |
p11 |
full or isothermal anneal |
|
|
|
normalize and temper |
- |
1200 [650] |
p22 |
full or isothermal anneal |
|
|
|
normalize and temper |
- |
1250 [675] |
p91 |
normalize and temper |
1900-1975 [1040 - 1080] |
1350-1470 [730 - 800] |
|
quench and temper |
1900-1975 [1040 - 1080] |
1350-1470 [730 - 800] |
CHEMICAL COMPOSITION
The types of alloy steel covered by the ASTM A335 – ASME SA335 specification are designed with a “P” prefix, from P5 to P92. Grades P11/P22 and P91/92 are typically found in power stations, whereas grade P5 and P9 are more common for application in the petrochemical industry. Grades P9 and P91 are in the list, the more expensive.
ASTM A335 |
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 |
0.5 |
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 |
0.5 |
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 |
0.5 |
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 |
0.5 |
2.65~3.35 |
0.80~1.60 |
P22 |
K21590 |
0.05~0.15 |
0.30~0.60 |
0.025 |
0.025 |
0.5 |
1.90~2.60 |
0.87~1.13 |
P91 |
K91560 |
0.08~0.12 |
0.30~0.60 |
0.02 |
0.01 |
0.20~0.50 |
8.00~9.50 |
0.85~1.05 |
P92 |
K92460 |
0.07~0.13 |
0.30~0.60 |
0.02 |
0.01 |
0.5 |
8.50~9.50 |
0.30~0.60 |
MECHANICAL PROPERTIES
A335 Low-Alloy Pipe |
UNS Number |
Yield Strength ksi |
Tensile Strength ksi |
Elongation % |
Rockwell |
Brinell |
P1 |
K11522 |
30 |
55 |
30 |
– |
– |
P2 |
K11547 |
30 |
55 |
30 |
– |
– |
P5 |
K41545 |
40 |
70 |
30 |
– |
207 max |
P9 |
S50400 |
30 |
60 |
30 |
– |
– |
P11 |
K11597 |
30 |
60 |
20 |
– |
– |
P12 |
K11562 |
32 |
60 |
30 |
– |
174 max |
P22 |
K21590 |
30 |
60 |
30 |
– |
– |
P91 |
K91560 |
60 |
85 |
20 |
– |
– |
TESTING REQUIREMENTS
Transverse/longitudinal: tension and flattening, hardness, bend tests- for material that has been heat-treated in batch furnaces, these tests shall be made on the 5% of the pipes from each heat lot number. For smaller lots, one pipe at a minimum has to be tested
ASTM A335 Gr. P91 shall have a hardness of 250 HB / 265 HV (25 HRC)
Hydro testing: shall be applied to every length of pipe
The non-destructive electric test is optional
there are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method to work prevent rusting and sea transportation security.our packing can meet any needs of the customers.
plastic caps plugged at the two sides of pipe ends
should be avoided by the steel strapping and transport damage
bundled signs should be uniform and consistent
the same bundle(batch) of steel pipe should be came from the same furnace.
the steel pipe has the same furnace number, the same steel grade, the same specifications.
astm a335 steel pipe chemical composition:
material |
c |
si |
mn |
p |
s |
mo |
cr |
|
% |
% |
% |
% |
max |
% |
max |
a335 grade p1 |
0.10---0.20 |
0.10---0.50 |
0.30---0.80 |
0.025 |
0.025 |
0.440.65 |
|
a335 grade p5 |
max 0.15 |
max 0.50 |
0.30---0.60 |
0.025 |
0.025 |
0.450.65 |
4.006.00 |
a335 grade p11 |
0.05---0.15 |
0.5---1.0 |
0.30---0.60 |
0.025 |
0.025 |
0.450.65 |
1.001.50 |
a335 grade p12 |
0.05---0.15 |
max 0.50 |
0.30---0.61 |
0.025 |
0.025 |
0.450.65 |
0.801.25 |
a335 grade p22 |
0.05---0.15 |
max 0.50 |
0.30---0.60 |
0.025 |
0.025 |
0.871.13 |
1.902.60 |
astm a335 steel pipe mechanical properties:
material |
tensile n/mm2 |
strength min n/mm2 |
yield %min |
a335 grade p1 |
min380 |
205 |
30 |
a335 grade p5 |
min415 |
205 |
30 |
a335 grade p11 |
min415 |
205 |
30 |
a335 grade p12 |
min415 |
205 |
30 |
a335 grade p22 |
min415 |
205 |
30 |
stm a335 steel pipe may be either hot finished or cold drawn with the finishing heat treatment noted below.
astm a335 grade |
heat treatment type |
normalizing temperature range f [c] |
subcritical annealing or tempering |
p5 (b,c) |
full or isothermal anneal |
|
|
|
normalize and temper |
- |
1250 [675] |
|
subcritical anneal (p5c only) |
- |
1325 - 1375 [715 - 745] |
p9 |
full or isothermal anneal |
|
|
|
normalize and temper |
- |
1250 [675] |
p11 |
full or isothermal anneal |
|
|
|
normalize and temper |
- |
1200 [650] |
p22 |
full or isothermal anneal |
|
|
|
normalize and temper |
- |
1250 [675] |
p91 |
normalize and temper |
1900-1975 [1040 - 1080] |
1350-1470 [730 - 800] |
|
quench and temper |
1900-1975 [1040 - 1080] |
1350-1470 [730 - 800] |
CHEMICAL COMPOSITION
The types of alloy steel covered by the ASTM A335 – ASME SA335 specification are designed with a “P” prefix, from P5 to P92. Grades P11/P22 and P91/92 are typically found in power stations, whereas grade P5 and P9 are more common for application in the petrochemical industry. Grades P9 and P91 are in the list, the more expensive.
ASTM A335 |
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 |
0.5 |
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 |
0.5 |
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 |
0.5 |
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 |
0.5 |
2.65~3.35 |
0.80~1.60 |
P22 |
K21590 |
0.05~0.15 |
0.30~0.60 |
0.025 |
0.025 |
0.5 |
1.90~2.60 |
0.87~1.13 |
P91 |
K91560 |
0.08~0.12 |
0.30~0.60 |
0.02 |
0.01 |
0.20~0.50 |
8.00~9.50 |
0.85~1.05 |
P92 |
K92460 |
0.07~0.13 |
0.30~0.60 |
0.02 |
0.01 |
0.5 |
8.50~9.50 |
0.30~0.60 |
MECHANICAL PROPERTIES
A335 Low-Alloy Pipe |
UNS Number |
Yield Strength ksi |
Tensile Strength ksi |
Elongation % |
Rockwell |
Brinell |
P1 |
K11522 |
30 |
55 |
30 |
– |
– |
P2 |
K11547 |
30 |
55 |
30 |
– |
– |
P5 |
K41545 |
40 |
70 |
30 |
– |
207 max |
P9 |
S50400 |
30 |
60 |
30 |
– |
– |
P11 |
K11597 |
30 |
60 |
20 |
– |
– |
P12 |
K11562 |
32 |
60 |
30 |
– |
174 max |
P22 |
K21590 |
30 |
60 |
30 |
– |
– |
P91 |
K91560 |
60 |
85 |
20 |
– |
– |
TESTING REQUIREMENTS
Transverse/longitudinal: tension and flattening, hardness, bend tests- for material that has been heat-treated in batch furnaces, these tests shall be made on the 5% of the pipes from each heat lot number. For smaller lots, one pipe at a minimum has to be tested
ASTM A335 Gr. P91 shall have a hardness of 250 HB / 265 HV (25 HRC)
Hydro testing: shall be applied to every length of pipe
The non-destructive electric test is optional
there are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method to work prevent rusting and sea transportation security.our packing can meet any needs of the customers.
plastic caps plugged at the two sides of pipe ends
should be avoided by the steel strapping and transport damage
bundled signs should be uniform and consistent
the same bundle(batch) of steel pipe should be came from the same furnace.
the steel pipe has the same furnace number, the same steel grade, the same specifications.