US2005006011A1PendingUtilityA1
Use of a steel alloy for making tubes to produce compressed gas containers or for making formed structures in light weight steel construction
Assignee: BENTELER AUTOMOBILTECHNIK GMBHPriority: Feb 15, 2002Filed: Aug 5, 2004Published: Jan 13, 2005
Est. expiryFeb 15, 2022(expired)· nominal 20-yr term from priority
C22C 38/02B32B 15/013C22C 38/38C22C 38/24C22C 38/22C23C 2/06C22C 38/06
40
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Claims
Abstract
A method of using a steel alloy, the steel alloy having a composition containing in mass %, 0.09-0.13% C, 0.10-0.50% Si, 1.10-1.80% Mn, max. 0.02% P, max. 0.02% S, 1.00-2.00% Cr, 0.20-0.60% Mo, 0.02-0.06 Al, 0.10-0.25% V, the balance iron and incidental impurities, includes the steps of forming a tube from the steel alloy; air hardening the tube in the presence of inert gas, and incorporating the tube in the production of a compressed gas container. The steel composition may also be used as material for producing formed structures in light weight steel construction.
Claims
exact text as granted — not AI-modified1 . A method of using a steel alloy, the steel alloy having a composition comprising, in mass %,
C
0.09-0.13%
Si
0.10-0.50%
Mn
1.10-1.80%
P
maximum
0.02%
S
maximum
0.02%
Cr
1.00-2.00%
Mo
0.20-0.60%
Al
0.02-0.06%
V
0.10-0.25%
the balance iron and incidental impurities, said method comprising the steps of forming a tube from the steel alloy; air hardening the tube in the presence of inert gas; and incorporating the tube in the production of a compressed gas container.
2 . The method of claim 1 , wherein the forming step includes annealing a hot-rolled seamless tubular blank until becoming soft, pickling the blank, phosphatizing the blank, soaping the blank, and drawing the blank to form the tube.
3 . The method of claim 2 , wherein the air hardening step is carried out in a continuous furnace at a temperature of 950° C.±15° C.
4 . The method of claim 2 , wherein the incorporating step includes straightening the tube, cutting the tube to length, and shaping the tube into the compressed gas container.
5 . A method of using a steel alloy, the steel alloy having a composition comprising, in mass %,
C
0.09-0.13%
Si
0.10-0.50%
Mn
1.10-1.80%
P
maximum
0.02%
S
maximum
0.02%
Cr
1.00-2.00%
Mo
0.20-0.60%
Al
0.02-0.06%
V
0.10-0.25%
the balance iron and incidental impurities, said method comprising the steps of forming a formed structure; and incorporating the formed structure in light weight steel construction.
6 . The method of claim 5 , further comprising the steps of air-hardening and tempering the formed structure to have a tensile strength of Rm of >850 N/mm 2 , a yield point Rp0.2 of >700 N/mm 2 , and a stretch A5 of >15%; and high temperature galvanizing the formed structure.
7 . The method of claim 6 , wherein the formed structure has a tensile strength of Rm of >950 N/mm 2 , a yield point Rp0.2 of >700 N/mm 2 , and a stretch A5 of >14%.
8 . A method of using a steel alloy, the steel alloy having a composition comprising, in mass %,
C
0.09-0.12%
Si
0.15-0.30%
Mn
1.45-1.60%
P
maximum
0.015%
S
maximum
0.011%
Cr
1.25-1.50%
Mo
0.40-0.60%
Al
0.02-0.06%
V
0.12-0.20%
Cu
maximum
0.20%
Ni
maximum
0.70%
the balance iron and incidental impurities, said method comprising the steps of forming a tube from the steel alloy; air hardening the tube in the presence of inert gas; and incorporating the tube in the production of a compressed gas container.
9 . The method of claim 8 , wherein the steel alloy contains a maximum of 0.2% of Ni.
10 . A method of using a steel alloy, the steel alloy having a composition comprising, in mass %,
C
0.09-0.13%
Si
0.15-0.30%
Mn
1.10-1.60%
P
maximum
0.015%
S
maximum
0.011%
Cr
1.00-1.60%
Mo
0.30-0.60%
Al
0.02-0.05%
V
0.12-0.25%
the balance iron and incidental impurities, said method comprising the steps of forming a formed structure; air-hardening and tempering the formed structure to have in the air-tempered state a tensile strength of Rm of >850 N/mm 2 , a yield point Rp0.2 of >700 N/mm 2 , and a stretch A5 of >15%; and incorporating the formed structure in light weight steel construction.
11 . The method of claim 10 , wherein in the air-hardened state the formed structure has a tensile strength of Rm of >950 N/mm 2 , a yield point Rp0.2 of >700 N/mm 2 , and a stretch A5 of >14%.
12 . The method of claim 10 , and further comprising the step of high temperature galvanizing the formed structure.
13 . A compressed gas container, comprising a tube, said tube being formed from a steel alloy comprising, in mass %,
C
0.09-0.13%
Si
0.10-0.50%
Mn
1.10-1.80%
P
maximum
0.02%
S
maximum
0.02%
Cr
1.00-2.00%
Mo
0.20-0.60%
Al
0.02-0.06%
V
0.10-0.25%
the balance iron and incidental impurities.
14 . A compressed gas container, comprising a tube, said tube being formed from a steel alloy comprising, in mass %,
C
0.09-0.12%
Si
0.15-0.30%
Mn
1.45-1.60%
P
maximum
0.015%
S
maximum
0.011%
Cr
1.25-1.50%
Mo
0.40-0.60%
Al
0.02-0.06%
V
0.12-0.20%
Co
maximum
0.20%
Ni
maximum
0.70%
the balance iron and incidental impurities.
15 . A formed structure for use in light weight steel construction, made from a steel alloy comprising, in mass %,
C
0.09-0.13%
Si
0.10-0.50%
Mn
1.10-1.80%
P
maximum
0.02%
S
maximum
0.02%
Cr
1.00-2.00%
Mo
0.20-0.60%
Al
0.02-0.06%
V
0.10-0.25%
the balance iron and incidental impurities.
16 . A formed structure for use in light weight steel construction, made from a steel alloy comprising, in mass %,
C
0.09-0.13%
Si
0.15-0.30%
Mn
1.10-1.60%
P
maximum
0.015%
S
maximum
0.011%
Cr
1.00-1.60%
Mo
0.30-0.60%
Al
0.02-0.05%
V
0.12-0.25%
the balance iron and incidental impurities, and having in air-tempered state a tensile strength of Rm of >850 N/mm 2 , a yield point Rp0.2 of >700 N/mm 2 , and a stretch A5 of >15%
17 . The formed structure of claim 16 , having in air-hardened state a tensile strength of Rm of >950 N/mm 2 , a yield point Rp0.2 of >700 N/mm 2 , and a stretch A5 of >14%.
18 . A steel alloy, essentially consisting of, in mass %,
C
0.09-0.13%
Si
0.10-0.50%
Mn
1.10-1.80%
P
maximum
0.02%
S
maximum
0.02%
Cr
1.00-2.00%
Mo
0.20-0.60%
Al
0.02-0.06%
V
0.10-0.25%
the balance iron and incidental impurities.
19 . A steel alloy, essentially consisting of, in mass %,
C
0.09-0.12%
Si
0.15-0.30%
Mn
1.45-1.60%
P
maximum
0.015%
S
maximum
0.011%
Cr
1.25-1.50%
Mo
0.40-0.60%
Al
0.02-0.06%
V
0.12-0.20%
Co
maximum
0.20%
Ni
maximum
0.70%
the balance iron and incidental impurities.
20 . The steel alloy of claim 19 , containing a maximum of 0.2% of Ni.
21 . A steel alloy, essentially consisting of, in mass %,
C
0.09-0.13%
Si
0.15-0.30%
Mn
1.10-1.60%
P
maximum
0.015%
S
maximum
0.011%
Cr
1.00-1.60%
Mo
0.30-0.60%
Al
0.02-0.05%
V
0.12-0.25%
the balance iron and incidental impurities.Join the waitlist — get patent alerts
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