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Duplex S31050 Duplex Stainless Steel Fasteners Stainless Steel Grade 310 MoLN

Zhengzhou Huitong Pipeline Equipment Co.,Ltd.

Duplex S31050 Duplex Stainless Steel Fasteners Stainless Steel Grade 310 MoLN

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Brand Name : HT

Model Number : Stainless steel grade 310 MoLN Duplex S31050 Duplex Stainless Steel Fasteners

Certification : ISO9001

Place of Origin : China

MOQ : 1 pcs

Price : USD 1000/piece

Payment Terms : L/C,T/T, Western Union

Supply Ability : 1000 pcs per month

Delivery Time : 30-35 working days

Packaging Details : wooden case, wooden pallet

Product Type : bolt nut washer

Name : Stainless steel grade 310 MoLN Duplex S31050 Duplex Stainless Steel Fasteners

Size : M6-M100

Finish : Cold galvanizing, Hot-dip Galvanizing, PTFE, Zinc Nickel, Black coating, Plain

Standard : DIN931 DIN933 DIN912 DIN934 DIN125 DIN127

Material : Nickel alloy/stainless steel/duplex stainless

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Stainless steel grade 310 MoLN Duplex S31050 Duplex Stainless Steel Fasteners

1.Introduction

Stainless steel grade 310 MoLN is a fully austenitic stainless steel that does not have intermetallic phases such as intergranular carbide precipitations. The 310MoLN steel grade has an optimized chemical composition designed specifically for applications in urea plants. The nitrogen in the chemical composition helps to stabilize and strengthen the austenitic phase. This material provides improved corrosion-resistance in urea carbamate environments such as high-pressure strippers.

The following datasheet provides an overview of stainless steel grade 310 MoLN.

2.Chemical Composition

The chemical composition of stainless steel grade 310 MoLN is outlined in the following table.

ElementContent (%)
Iron, FeBalance
Chromium, Cr24-26
Nickel, Ni21-23
Molybdenum, Mo2-2.50
Manganese, Mn≤ 2
Nitrogen, N0.10-0.16
Silicon, Si≤ 0.70
Phosphorous, P0.025
Carbon, C≤ 0.020
Sulfur, S≤ 0.010

3.Mechanical Properties

The mechanical properties of stainless steel grade 310 MoLN are displayed in the following table.

PropertiesMetricImperial
Tensile strength540-740 MPa78320- 107327 psi
Proof strength250 MPa36259 psi
Modulus of elasticity (20°C)195 GPa28282 ksi
Elongation at break (In 2", 50% cold worked)40%40%
Hardness, Brinell9595




4.UREA 25.22.2

UREA 25.22.2 chemical composition has been optimised for specific uses in Urea plants. It is a 310L modified austenitic stainless steel with low carbon, low silicon and high nitrogen additions in order to stabilize and strengthen the austenitic phase. The alloy is particularly designed for improved corrosion resistance properties in urea carbonate environments including strippers. The grade is also well designed for resistance in wet corrosive conditions due to its high contents of chromium, molybdenum and nitrogen (PREN > 33). UREA 25.22.2 is designed for the fabrication of lining interiors in Urea units or complementary products (pipes, fittings…). The grade can be used for urea strippers.

5.Heat Treatment

heat treatment (1140°-1180°C –2084-2156°F) and water quenching

  • Corrosion Testing

  • Nondestructive testing

  • Welding

The corrosion resistance properties are enhanced thanks to the low carbon level, low silicon level and complementary additions of nitrogen.
Typical maximum corrosion results required following different specifications for the 25.22.2 grade after 5 periods of 48 h following ASTM A 262-C practice are:
maximum general corrosion: 1,6 μm/48 h or 65 mg/dm² per hour with a maximum depth of microcracks of 100 μm in the long direction of rolling.

Marking

All material will be marked as follow:

  • Manufacturer’s name
  • Material grade
  • Size
  • Heat Number

Certification

Material will be delivered with certificate EN 10204 3.1

Other UREA grades

















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