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[China]
Trade Verify
Address: No 999,Airport Road,wenzhou industry park,zhejiang china
Contact name:Bain
WENZHOU ZHEHENG STEEL INDUSTRY CO;LTD |
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Verified Suppliers
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WP904L N08904(904L) S31254(254SMO) Duplex Alloy Stainless Steel Pipe Caps Pipe Fittings
| Austenitic Stainless Steel | Duplex Steel | Super Stainless Steel |
| ASTM SERIES | ||
| A403: | A815: | A403: |
| WP304, WP304H, WP304L, WP304N | WPS31803(UNS S31803) | N08904(904L) |
| WP309, WP310S, WP316, WP316H, WP316L, WP316N | WPS32750(UNS S32750) | S31254(254SMO) |
| WP317, WP317L, WP321, WP321H, WP347, WP347H | WPS32760(UNS S32760) | |
| WPNIC, WPNIC11, WP348, WP348H, WP700 | WPS32205(UNS S32205), | |
| WP304LN, WP316LN, WP347LN, WP6XN, WP20CB | ||
| WP1925, WP1925N, WPS31725, WPS31726, WPS31727 | ||
| WPS31730, WPS32053, WPS33228, WPS34565, WPS38815 | ||
| 304/304L, 316/316L,317/317L, 321/321H | ||
| EN/DIN SERIES | ||
| 1.4301(X5CrNi1810), 1.4306(X2CrNi1911), | 1.4462(X2CrNiMoN22-5-3), | 1.4539(X2NiCrMoCu25-20-5) |
| 1.4301H(X5CrNBi1810H), 1.4311(X2CrNiN1810) | 1.4410(X2CrNiMoN25-7-4) | 1.4547(X2NiCrMoCu20-18-7) |
| 1.4845(X12CrNi2521), 1.4401(X5CrNiMo17122) | 1.4501(X2CrNiMoCuWN25-7-4) | |
| 1.4404(X2CrNiMo171321), 1.4919(X6CrNiMo1713) | ||
| 1.4406(X2CrNiMoN17122), 1.4571(X6CrNiMoTi17122) | ||
| 1.4438(X2CrNIMo18164), 1.4449(X5CrNiMo1713) | ||
| 1.4541(X6CrNiTi1810), 1.4541H(X6CrNiTi1810H) | ||
| 1.4550(X6CrNiNb1810), 1.4961(X8CrNiNb16-13) | ||
| ASTM UNS SERIES | ||
| A403 S30400, S30409, S30403, S30451, S30900, S31008, S31600, S31609, S31603, S31651, S31700, S31703, S32100 | ||
| S32109, S34700, S34709, N08800, N08811, N08700, S30453, S31651, S34751, N08367, N08020, N08925, N08925N | ||
904L corrosion resistance
Since the carbon content of 904L is very low (maximum 0.020%),
there is no carbide precipitation in the case of general heat
treatment and welding. This eliminates the risk of intergranular
corrosion after general heat treatment and welding. Due to the high
chromium-nickel-molybdenum content and the addition of copper, 904L
can be passivated even in a reducing environment, such as sulfuric
acid and formic acid.
The high nickel content makes it have a lower corrosion rate in the
active state. In pure sulfuric acid in the concentration range of
0~98%, the use temperature of 904L can be as high as 40 degrees
Celsius. In pure phosphoric acid in the concentration range of
0~85%, its corrosion resistance is very good. In industrial
phosphoric acid produced by the wet process, impurities have a
strong influence on corrosion resistance. Among all kinds of
phosphoric acid, 904L has better corrosion resistance than ordinary
stainless steel. Among the highly oxidizing nitric acid, 904L has
lower corrosion resistance than high-alloy steel grades that do not
contain molybdenum. In hydrochloric acid, the use of 904L is
limited to a lower concentration of 1-2%. In this concentration
range. The corrosion resistance of 904L is better than conventional
stainless steel.
904L steel has high resistance to pitting corrosion. Its resistance
to crevice corrosion in chloride solutions is also very good. The
high nickel content of 904L reduces the corrosion rate at pits and
crevices. Ordinary austenitic stainless steels may be sensitive to
stress corrosion in a chloride-rich environment at temperatures
above 60 degrees Celsius. This sensitization can be reduced by
increasing the nickel content of the stainless steel. Due to the
high nickel content, 904L has high resistance to stress corrosion
cracking in chloride solution, concentrated hydroxide solution and
hydrogen sulfide-rich environment.
FAQ
1.Q:Are you a factory or trading company?
A: We are a factory, has more than 20 years experience in pipe
fittings production.
2.Q:Where is your factory located? How can I visit there?
A: Our factory is located in wenzhou City, zhejiang Province,China.
3.Q:How does your factory do regarding quality control?
A: We are ISO9001& PED certified by TUV. We serious control the
quality from raw material to finished pipe fittings. So that we can
100% sure our goods is qualified.
4. Q: Price high ?
A: Our price is workable. We had tried use auto equipment to save
Workers cost, and control other costs. like human sources,
logistics etc.
5.Q: After sales service.
A: Quality are promised. If our products are not meet the contract
we would like to send free goods to you.
