GB/T 4237 022Cr19Ni13Mo4N S31753 Stainless Steel Plate Supplier
GB/T 4237 022Cr19Ni13Mo4N: what it is and who uses it
022Cr19Ni13Mo4N is 317LN: nitrogen 0.10–0.22% added to 317L. Annex B notes its high strength and corrosion resistance for tanks and containers; minimum proof strength rises to 240 MPa.
Reading the designation: ‘022’ gives the carbon level (C ≤0.030% in GB/T 4237), followed by Cr19 = about 19% chromium; Ni13 = about 13% nickel; Mo4 = about 4% molybdenum; N = nitrogen added. S31753 is the unified numeric code (ISC) used in GB/T 4237-2015.
SHH STEEL produces and exports austenitic stainless plate from China, works as a sales agent for leading stainless mills, and runs its own processing warehouse for cutting and surface finishing. 022Cr19Ni13Mo4N is part of our GB/T 4237 stainless plate range; for comparison, see our AISI 317L page.
022Cr19Ni13Mo4N chemical composition (heat analysis)
| Element | 022Cr19Ni13Mo4N heat analysis, % (Table 15) | Why it matters |
|---|---|---|
| C | ≤ 0.030 | Carbon. Low values protect welds from carbide precipitation; higher values add hot strength or hardenability. |
| Si | ≤ 0.75 | Silicon. Deoxidizer; in heat-resistant grades it builds a protective scale. |
| Mn | ≤ 2.00 | Manganese. Deoxidizer; in Mn-bearing grades it replaces nickel and keeps nitrogen in solution. |
| P | ≤ 0.045 | Phosphorus. Impurity, kept low for toughness and weld cracking resistance. |
| S | ≤ 0.030 | Sulfur. Impurity; low sulfur improves pitting resistance, hot workability and polishability. |
| Cr | 18.00 – 20.00 | Chromium. Forms the passive film; the main driver of corrosion and oxidation resistance. |
| Ni | 11.00 – 15.00 | Nickel. Stabilizes austenite, improves toughness and resistance to reducing acids. |
| Mo | 3.00 – 4.00 | Molybdenum. Raises pitting and crevice resistance in chlorides (×3.3 in PREN). |
| N | 0.10 – 0.22 | Nitrogen. Strengthens, stabilizes austenite and adds pitting resistance (×16 in PREN). |
| PREN (Cr + 3.3Mo + 16N) | 29.5 – 33.1 (minimum – mid-range) | Calculated from the limits above, not a requirement of GB/T 4237 |
Values are maximum unless a range is given. The mill reports the ladle (heat) analysis on the certificate; this is the figure to compare with Table 15.
Product (check) analysis tolerances
A check analysis drilled from the finished plate may differ slightly from the heat analysis. GB/T 4237 refers to GB/T 222 for the permitted deviations; the table applies them to the 022Cr19Ni13Mo4N limits. Deviations apply to one side of a range only, never to both sides in the same heat.
| Element | Heat analysis limit (%) | Permitted deviation | Product analysis limit (%) |
|---|---|---|---|
| C | ≤ 0.030 | +0.005 | ≤ 0.035 |
| Si | ≤ 0.75 | ±0.05 | ≤ 0.80 |
| Mn | ≤ 2.00 | ±0.04 | ≤ 2.04 |
| P | ≤ 0.045 | +0.010 | ≤ 0.055 |
| S | ≤ 0.030 | +0.005 | ≤ 0.035 |
| Cr | 18.00 – 20.00 | ±0.20 | 17.80 – 20.20 |
| Ni | 11.00 – 15.00 | ±0.15 | 10.85 – 15.15 |
| Mo | 3.00 – 4.00 | ±0.10 | 2.90 – 4.10 |
| N | 0.10 – 0.22 | ±0.01 (min) / ±0.02 (max) | 0.09 – 0.24 |
Where the table says ‘by agreement’, the deviation is not tabulated for that content level and should be agreed in the contract, usually by reference to ASTM A480 Table A1.1.
Mechanical properties at room temperature
| Property | 022Cr19Ni13Mo4N (Table 20) |
|---|---|
| Proof strength Rp0.2, MPa | ≥ 240 |
| Tensile strength Rm, MPa | ≥ 550 |
| Elongation A, % | ≥ 40 |
| Hardness HBW | ≤ 217 |
| Hardness HRB | ≤ 95 |
| Hardness HV | ≤ 220 |
Values apply to plate in the delivery heat-treated condition, tested transversely per GB/T 228.1. Hardness is checked by one method chosen by the mill.
How 022Cr19Ni13Mo4N performs in corrosive service
Molybdenum raises resistance to chlorides, sulfurous media and reducing acids. The low-carbon and nitrogen variants keep that resistance across welds.
PREN of 022Cr19Ni13Mo4N from the GB/T 4237 limits: 29.5 – 33.1. PREN is a ranking tool for pitting in chlorides, not a guarantee; temperature, crevices, deposits and weld finish matter as much.
Intergranular corrosion testing is not compulsory for this grade in GB/T 4237-2015; when required, the method (GB/T 4334, ASTM A262 or A923 for duplex) and acceptance are agreed in the order.
If service is harsher than 022Cr19Ni13Mo4N can handle, the next step up in this batch is GB/T 4237 022Cr19Ni16Mo5N S31723.
International equivalents of 022Cr19Ni13Mo4N S31753
| Standard system | Equivalent / closest grade |
|---|---|
| China GB/T 4237-2015 | 022Cr19Ni13Mo4N (S31753) |
| ASTM A240/A240M | 317LN / S31753 |
| EN 10088-2 | X2CrNiMoN18-12-4 / 1.4434 |
| JIS G4304 (hot rolled) | SUS317LN |
| Common name | 317LN |
Equivalent grades are close in chemistry and properties but are never identical: limits on carbon, nitrogen and residual elements differ. For dual or multiple certification the heat must meet every standard named on the order, and we confirm that from the heat chemistry before quotation.
Related pages: AISI 317L, ASTM A240 Type 317L. See also our ASTM A240/A240M and JIS G4305 plate lists.
What the standard covers for this grade
| Item | GB/T 4237-2015 requirement / SHH STEEL supply |
|---|---|
| Standard | GB/T 4237-2015 Hot rolled stainless steel plate, sheet and strip (current edition, replaces GB/T 4237-2007) |
| Grade / unified code | 022Cr19Ni13Mo4N / S31753 |
| Steel class | Austenitic |
| Chemical composition | Table 15 (heat analysis); product analysis per GB/T 222 |
| Mechanical properties | Table 20 |
| Product forms | Hot-rolled thick plate (3.0 – 200 mm in the standard), hot-rolled wide strip and cut plate (2.0 – 25.4 mm) |
| Our usual thickness range | 3 – 120 mm (to 150 mm by mill order) |
| Delivery condition | ≥ 1 040 °C, water quench or other rapid cooling |
| Surface | Hot rolled, heat treated, pickled (No.1 / 1D) as standard; ground or polished by agreement |
| Density | 8.0 g/cm³ |
| Certificate | EN 10204 3.1 mill certificate; 3.2 with third-party inspection on request |
Sister grades on the same standard are listed under GB/T 4237; cold-rolled sheet of the same chemistry is ordered to GB/T 3280, and all our plate lines sit in stainless steel sheets and plates.
Comparison with sister grades
The table compares 022Cr19Ni13Mo4N with the grades buyers most often weigh it against. Strength values are GB/T 4237-2015 minimums; PREN is calculated from the minimum chemistry.
| Grade (GB/T 4237) | Key chemistry, % | PREN min | Rp0.2 min, MPa | Rm min, MPa |
|---|---|---|---|---|
| 022Cr19Ni13Mo4N S31753 | C ≤ 0.030, Cr 18.00 – 20.00, Ni 11.00 – 15.00, Mo 3.00 – 4.00, N 0.10 – 0.22 | 29.5 | 240 | 550 |
| GB/T 4237 022Cr19Ni13Mo3 S31703 | C ≤ 0.030, Cr 18.00 – 20.00, Ni 11.00 – 15.00, Mo 3.00 – 4.00, N ≤ 0.10 | 27.9 | 205 | 515 |
| GB/T 4237 022Cr19Ni16Mo5N S31723 | C ≤ 0.030, Cr 17.00 – 20.00, Ni 13.50 – 17.50, Mo 4.00 – 5.00, N 0.10 – 0.20 | 31.8 | 240 | 550 |
| GB/T 4237 022Cr17Ni12Mo2N S31653 | C ≤ 0.030, Cr 16.00 – 18.00, Ni 10.00 – 14.00, Mo 2.00 – 3.00, N 0.10 – 0.16 | 24.2 | 205 | 515 |
Molybdenum is still 3.00–4.00% despite the ‘Mo4’ in the name; the gain over 317L comes from nitrogen. Mill-order grade.
Cutting, forming and welding 022Cr19Ni13Mo4N plate
Use ER316L/E316L filler, or ER317L when the weld must not be the weak point in chloride service. A small ferrite number (FN 3–10) in the weld metal prevents hot cracking.
Interpass ≤150 °C, no preheat, clean back purge with argon for root passes. Pickle and passivate after welding: heat tint lowers pitting resistance more in Mo grades than the weld itself.
Cutting: we cut 022Cr19Ni13Mo4N by plasma (up to about 150 mm), laser (thin plate) or waterjet, and remove the heat-affected edge by machining where the drawing requires it.
How 022Cr19Ni13Mo4N plate is heat treated
Recommended heat treatment for 022Cr19Ni13Mo4N (GB/T 4237-2015 Annex C): ≥ 1 040 °C, water quench or other rapid cooling.
Cool rapidly through 850–450 °C after annealing; slow cooling of thick Mo-bearing plate risks carbide and sigma precipitation.
Finishes and warehouse services
| Finish | Description | Availability for this grade |
|---|---|---|
| No.1 / 1D | Hot rolled, heat treated, pickled; the GB/T 4237 standard surface | Standard |
| Shot-blasted + pickled | Uniform matte for welded structures | On request |
| No.4 / brushed | Abrasive finish, grit 150–180 | Warehouse processing, thin plate |
| HL (hairline) | Long continuous lines, decorative | Warehouse processing, thin plate |
| 8K mirror | Polished reflective finish | Warehouse processing, limited sizes |
| 2B / BA | Cold-rolled finishes (ordered as GB/T 3280 sheet, not hot-rolled plate) | Sheet only |
Our warehouse cuts plate to size (plasma, laser, waterjet, saw), bevels weld edges, polishes and applies PVC protective film. Processed plate ships with the original mill heat number marked. Ask for cut pieces of other stainless steel products at the same time to consolidate freight.
Typical uses of GB/T 4237 022Cr19Ni13Mo4N
Where buyers specify it:
- Storage tanks for aggressive chemicals
- FGD equipment
- Pulp mill vessels
- Pressure equipment in chloride media
Buyers specifying 022Cr19Ni13Mo4N for these jobs often compare it with GB/T 4237 022Cr19Ni13Mo3 S31703 and GB/T 4237 022Cr17Ni12Mo2N S31653; the comparison table on this page shows the differences.
International grade pages for the alternatives mentioned above: AISI 317LMN, AISI 316LN.
Other GB/T 4237 grades buyers request alongside it: GB/T 4237 06Cr17Ni12Mo2 S31608, GB/T 4237 022Cr17Ni12Mo2 S31603.
Dimensions and plate weight
| Dimension | Typical supply |
|---|---|
| Thickness | 3 – 120 mm (to 150 mm by mill order) |
| Width | 1 000 / 1 219 / 1 250 / 1 500 / 1 800 / 2 000 mm; wider by mill order |
| Length | 2 000 / 2 438 / 3 000 / 6 000 mm or cut to size |
| Flatness | Per GB/T 4237; ≤15 mm per metre for plate up to 25 mm unless agreed tighter |
| Thickness tolerance | Per the GB/T 4237 dimensional tolerance tables (normal or higher accuracy as ordered) |
| Edge | Mill edge or cut edge |
Weight: plate mass in kg/m² = thickness (mm) × density (8.0 g/cm³). A 10 mm 022Cr19Ni13Mo4N plate weighs about 80.0 kg/m²; a 1 500 × 6 000 × 10 mm plate about 720 kg.
Testing and certification
- Heat chemical analysis on every heat; product analysis by agreement
- Tensile test (Rp0.2, Rm, A) per batch
- Hardness test
- Ultrasonic testing (NB/T 47013.3 or ASTM A578) when specified
- Positive material identification (PMI) on every plate leaving our warehouse
- Visual and dimensional inspection; third-party inspection (SGS, BV, TÜV, Intertek) at the buyer’s request
Certificates follow EN 10204 3.1 as standard. Where plate is also certified to ASME SA240 or ASTM A240, both standards are shown on one certificate.
Where our plate comes from
022Cr19Ni13Mo4N is produced by a small number of Chinese mills with the melting and heat treatment capability for it. We place mill orders for it through the producers we represent and do not usually hold it in stock. Expect about 45–90 days, with minimum quantities per thickness; we can combine small quantities into one rolling where the mill allows.
Every plate is traceable to its heat number, and copies of the mill certificates stay on file for repeat orders and audits. The same mills also supply our ASTM A240, ASME SA240, JIS G4305 and AISI plate ranges, so mixed-standard orders can ship together.
What to put on a 022Cr19Ni13Mo4N purchase order
- Standard and edition: GB/T 4237-2015
- Grade and code: 022Cr19Ni13Mo4N (S31753); add the equivalent if dual certification is needed
- Thickness × width × length, quantity in pieces or tonnes
- Thickness tolerance class and flatness if tighter than standard
- Surface finish and protective film
- Tests beyond the standard (IGC, UT, impact, ferrite, PMI, grain size)
- Certificate type (EN 10204 3.1 / 3.2) and inspection body
- Marking, packing (wooden cases, steel pallets) and delivery terms
Send the list to SHH STEEL and we return a quotation with mill, lead time and stock options. Other grades from the same standard can be combined in one shipment; browse GB/T 4237 plate grades.
Working with SHH STEEL
- Mill-direct prices with our own export documentation
- Own processing warehouse: cutting, bevelling, polishing, PVC film
- PMI and dimensional check before packing
- Mixed-grade shipments across our AISI stainless and GB/T plate ranges
- Technical answers from people who read the standard, not just the price list
SHH STEEL has exported stainless and carbon steel plate to buyers in Asia, the Middle East, Africa, Europe and the Americas.
FAQ
- Why is it called 022Cr19Ni13Mo4N if Mo is 3–4%?
- The GB/T 20878 name uses rounded nominal contents. 022Cr19Ni13Mo4N (S31753, 317LN) has Mo 3.00–4.00% and N 0.10–0.22% in GB/T 4237-2015; the nitrogen is what lifts strength (240 MPa) and PREN above 317L.
- What is the chemical composition of 022Cr19Ni13Mo4N?
- Under GB/T 4237-2015 Table 15, 022Cr19Ni13Mo4N (S31753) has C ≤ 0.030, Cr 18.00 – 20.00, Ni 11.00 – 15.00, Mo 3.00 – 4.00, N 0.10 – 0.22. Phosphorus is limited to ≤0.045% and sulfur to ≤0.030%.
- What is the ASTM equivalent of 022Cr19Ni13Mo4N?
- The closest equivalents of 022Cr19Ni13Mo4N (S31753) are 317LN / S31753 in ASTM, X2CrNiMoN18-12-4 / 1.4434 in EN, SUS317LN in JIS (common name: 317LN). Chemistry limits differ slightly, so dual certification depends on the actual heat.
- What are the mechanical properties of 022Cr19Ni13Mo4N plate?
- GB/T 4237-2015 Table 20 requires for 022Cr19Ni13Mo4N: proof strength Rp0.2 ≥240 MPa, tensile strength ≥550 MPa and elongation ≥40%, hardness ≤217 HBW. Values apply to plate in the delivery heat-treated condition.
- Is 022Cr19Ni13Mo4N stainless steel magnetic?
- Not in the annealed condition. 022Cr19Ni13Mo4N is austenitic, so annealed plate is essentially non-magnetic; cold work can induce slight magnetism, mostly at cut and bent edges.
- What thickness of 022Cr19Ni13Mo4N plate can you supply?
- Under GB/T 4237 we supply 022Cr19Ni13Mo4N hot-rolled plate in 3 – 120 mm (to 150 mm by mill order), widths up to 2 000 mm (wider by mill order), cut to size in our warehouse. Thinner material is cold-rolled sheet to GB/T 3280.
Conclusion
GB/T 4237 022Cr19Ni13Mo4N (S31753) is a molybdenum-bearing austenitic plate grade, known internationally as 317LN. It is defined by Table 15 chemistry (C ≤ 0.030, Cr 18.00 – 20.00, Ni 11.00 – 15.00, Mo 3.00 – 4.00, N 0.10 – 0.22) and Table 20 properties of at least 240 MPa proof strength and 550 MPa tensile strength. Typical uses include storage tanks for aggressive chemicals, fgd equipment and pulp mill vessels. Molybdenum is still 3.00–4.00% despite the ‘Mo4’ in the name; the gain over 317L comes from nitrogen.
Before ordering, state the standard edition, the grade name with its code, and any extra tests, so that the mill certificate matches your design documents. SHH STEEL supplies 022Cr19Ni13Mo4N plate by mill order through the producers we represent, cut to size and finished in our own warehouse, with EN 10204 3.1 certificates. For related grades see GB/T 4237 022Cr19Ni13Mo3 S31703 and GB/T 4237 022Cr19Ni16Mo5N S31723, our GB/T 4237 category and the AISI 317L page. Send your sizes and quantities for a quotation.
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