GB/T 4237 019Cr23MoTi S12362 Stainless Steel Plate Supplier
What is GB/T 4237 019Cr23MoTi (S12362) stainless steel plate?
019Cr23MoTi is the lower-molybdenum 23% chromium ferritic (Mo 0.70–1.50%), similar to SUS445J1. Its PREN of about 23–26 is in the 316L range, at a nickel-free cost.
Reading the designation: ‘019’ gives the carbon level (C ≤0.025% in GB/T 4237), followed by Cr23 = about 23% chromium; Mo = molybdenum added; Ti = titanium added. S12362 is the unified numeric code (ISC) used in GB/T 4237-2015.
SHH STEEL produces and exports ferritic stainless plate from China, works as a sales agent for leading stainless mills, and runs its own processing warehouse for cutting and surface finishing. 019Cr23MoTi is part of our GB/T 4237 stainless plate range; for comparison, see our ASTM A240 Type 444 page.
How 019Cr23MoTi performs in corrosive service
Molybdenum and higher chromium bring ferritic grades up to 304–316L pitting resistance while keeping freedom from chloride stress corrosion cracking.
PREN of 019Cr23MoTi from the GB/T 4237 limits: 23.3 – 26.1. PREN is a ranking tool for pitting in chlorides, not a guarantee; temperature, crevices, deposits and weld finish matter as much.
Intergranular corrosion testing of ferritic and martensitic plate is by agreement (GB/T 4334 or ASTM A763 practices).
If service is harsher than 019Cr23MoTi can handle, the next step up in this batch is GB/T 4237 019Cr23Mo2Ti S12361.
Heat analysis limits for 019Cr23MoTi
| Element | 019Cr23MoTi heat analysis, % (Table 17) | Why it matters |
|---|---|---|
| C | ≤ 0.025 | Carbon. Low values protect welds from carbide precipitation; higher values add hot strength or hardenability. |
| Si | ≤ 1.00 | Silicon. Deoxidizer; in heat-resistant grades it builds a protective scale. |
| Mn | ≤ 1.00 | Manganese. Deoxidizer; in Mn-bearing grades it replaces nickel and keeps nitrogen in solution. |
| P | ≤ 0.040 | 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 | 21.00 – 24.00 | Chromium. Forms the passive film; the main driver of corrosion and oxidation resistance. |
| Mo | 0.70 – 1.50 | Molybdenum. Raises pitting and crevice resistance in chlorides (×3.3 in PREN). |
| Cu | ≤ 0.60 | Copper. Improves resistance to sulfuric acid and, in ferritics, general corrosion and formability. |
| N | ≤ 0.025 | Nitrogen. Strengthens, stabilizes austenite and adds pitting resistance (×16 in PREN). |
| Other | Ti, Nb, Zr or their combination: 8 × (C+N) – 0.80 | Stabilizing / special-element requirement of the standard |
| PREN (Cr + 3.3Mo + 16N) | 23.3 – 26.1 (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 17.
Check analysis of 019Cr23MoTi plate
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 019Cr23MoTi 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 | ≤ 0.025 | +0.005 | ≤ 0.030 |
| Si | ≤ 1.00 | ±0.05 | ≤ 1.05 |
| Mn | ≤ 1.00 | ±0.03 | ≤ 1.03 |
| P | ≤ 0.040 | +0.005 | ≤ 0.045 |
| S | ≤ 0.030 | +0.005 | ≤ 0.035 |
| Cr | 21.00 – 24.00 | ±0.25 | 20.75 – 24.25 |
| Mo | 0.70 – 1.50 | ±0.05 | 0.65 – 1.55 |
| Cu | ≤ 0.60 | ±0.05 | ≤ 0.65 |
| N | ≤ 0.025 | ±0.01 | ≤ 0.035 |
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.
019Cr23MoTi S12362 tensile and hardness requirements
| Property | 019Cr23MoTi (Table 22) |
|---|---|
| Proof strength Rp0.2, MPa | ≥ 245 |
| Tensile strength Rm, MPa | ≥ 410 |
| Elongation A, % | ≥ 20 |
| Hardness HBW | ≤ 217 |
| Hardness HRB | ≤ 96 |
| Hardness HV | ≤ 230 |
| 180° bend (cold) | D=2a, no cracks on the outer surface |
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.
Living with a ferritic grade
019Cr23MoTi is ferritic: it is magnetic, has lower thermal expansion and better thermal conductivity than austenitic steel, and is immune to chloride stress corrosion cracking. Those properties make it a good choice for heat exchangers, hot water tanks and exhaust parts.
The trade-off is toughness. Ferritic stainless has a ductile-brittle transition, and it moves to higher temperature with thickness and grain size. This is why ferritic plate is mostly thin; for sections above about 6 mm ask for Charpy data or bend in a warm shop.
Ferritic grades contain little or no nickel, so their price is far more stable than GB/T 4237 06Cr19Ni10 S30408 (304).
Cross-reference to other standards
| Standard system | Equivalent / closest grade |
|---|---|
| China GB/T 4237-2015 | 019Cr23MoTi (S12362) |
| ASTM A240/A240M | — |
| EN 10088-2 | — |
| JIS G4304 (hot rolled) | SUS445J1 |
| Common name | 445J1 |
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: ASTM A240 Type 444. See also our ASTM A240/A240M and JIS G4305 plate lists.
Fabrication guidance
Weld with ER316L, ER439Mo or a matching Mo-bearing ferritic filler. Shield the root with argon; nitrogen and carbon pick-up embrittle high-chromium ferritic welds.
Keep heat input low and avoid weaving; HAZ grain growth reduces toughness more than in austenitic grades.
Cutting: we cut 019Cr23MoTi 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.
Choosing between 019Cr23MoTi and its neighbours
The table compares 019Cr23MoTi 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 |
|---|---|---|---|---|
| 019Cr23MoTi S12362 | C ≤ 0.025, Cr 21.00 – 24.00, Mo 0.70 – 1.50, N ≤ 0.025, Cu ≤ 0.60 | 23.3 | 245 | 410 |
| GB/T 4237 019Cr23Mo2Ti S12361 | C ≤ 0.025, Cr 21.00 – 24.00, Mo 1.50 – 2.50, N ≤ 0.025, Cu ≤ 0.60 | 25.9 | 245 | 410 |
| GB/T 4237 019Cr19Mo2NbTi S11972 | C ≤ 0.025, Cr 17.50 – 19.50, Ni ≤ 1.00, Mo 1.75 – 2.50, N ≤ 0.035 | 23.3 | 275 | 415 |
| GB/T 4237 019Cr21CuTi S12182 | C ≤ 0.025, Cr 20.50 – 23.00, N ≤ 0.025, Cu 0.30 – 0.80 | 20.5 | 205 | 390 |
Same plate thickness limits as the other high-Cr ferritics. Check toughness for anything over about 4 mm.
Specification summary
| 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 | 019Cr23MoTi / S12362 |
| Steel class | Ferritic |
| Chemical composition | Table 17 (heat analysis); product analysis per GB/T 222 |
| Mechanical properties | Table 22 |
| 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 | 2 – 10 mm |
| Delivery condition | 850 – 1 050 °C, rapid cooling |
| Surface | Hot rolled, heat treated, pickled (No.1 / 1D) as standard; ground or polished by agreement |
| Density | 7.7 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.
How 019Cr23MoTi plate is heat treated
Recommended heat treatment for 019Cr23MoTi (GB/T 4237-2015 Annex C): 850 – 1 050 °C, rapid cooling.
Rapid cooling after annealing avoids sigma and 475 °C embrittlement in Mo-bearing high-Cr ferritics.
Typical uses of GB/T 4237 019Cr23MoTi
Typical uses:
- Architectural panels and roofing
- Water tanks and heaters
- Appliance parts
- Heat exchangers in mild chloride
Buyers specifying 019Cr23MoTi for these jobs often compare it with GB/T 4237 019Cr23Mo2Ti S12361 and GB/T 4237 019Cr21CuTi S12182; the comparison table on this page shows the differences.
International grade pages for the alternatives mentioned above: JIS G4305 SUS443J1.
Other GB/T 4237 grades buyers request alongside it: GB/T 4237 019Cr18MoTi S11862, GB/T 4237 10Cr17 S11710, GB/T 4237 022Cr12 S11203, GB/T 4237 022Cr12Ni S11213, GB/T 4237 022Cr18Ti S11863.
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.
Sizes, tolerances and weight
| Dimension | Typical supply |
|---|---|
| Thickness | 2 – 10 mm |
| 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 (7.7 g/cm³). A 10 mm 019Cr23MoTi plate weighs about 77.0 kg/m²; a 1 500 × 6 000 × 10 mm plate about 693 kg.
Inspection, tests and mill certificates
- Heat chemical analysis on every heat; product analysis by agreement
- Tensile test (Rp0.2, Rm, A) per batch
- Hardness test
- 180° bend 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.
Supply chain and lead time
019Cr23MoTi 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 019Cr23MoTi purchase order
- Standard and edition: GB/T 4237-2015
- Grade and code: 019Cr23MoTi (S12362); 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.
FAQ
- What is the difference between 019Cr23MoTi and 019Cr23Mo2Ti?
- Both are 23Cr Ti-stabilized ferritics. 019Cr23MoTi (S12362) has Mo 0.70–1.50%; 019Cr23Mo2Ti (S12361) has Mo 1.50–2.50% and therefore a higher PREN. Mechanical minimums in GB/T 4237-2015 are the same: 245 MPa proof, 410 MPa tensile.
- What is the chemical composition of 019Cr23MoTi?
- Under GB/T 4237-2015 Table 17, 019Cr23MoTi (S12362) has C ≤ 0.025, Cr 21.00 – 24.00, Mo 0.70 – 1.50, N ≤ 0.025, Cu ≤ 0.60; Ti, Nb, Zr or their combination: 8 × (C+N) – 0.80. Phosphorus is limited to ≤0.040% and sulfur to ≤0.030%.
- What is the ASTM equivalent of 019Cr23MoTi?
- The closest equivalents of 019Cr23MoTi (S12362) are SUS445J1 in JIS (common name: 445J1). Chemistry limits differ slightly, so dual certification depends on the actual heat.
- What are the mechanical properties of 019Cr23MoTi plate?
- GB/T 4237-2015 Table 22 requires for 019Cr23MoTi: proof strength Rp0.2 ≥245 MPa, tensile strength ≥410 MPa and elongation ≥20%, hardness ≤217 HBW. Values apply to plate in the delivery heat-treated condition.
- Is 019Cr23MoTi stainless steel magnetic?
- Yes. 019Cr23MoTi is ferritic and is magnetic in all conditions.
- What thickness of 019Cr23MoTi plate can you supply?
- Under GB/T 4237 we supply 019Cr23MoTi hot-rolled plate in 2 – 10 mm, 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 019Cr23MoTi (S12362) is a molybdenum or high-chromium ferritic plate grade, known internationally as 445J1. It is defined by Table 17 chemistry (C ≤ 0.025, Cr 21.00 – 24.00, Mo 0.70 – 1.50, N ≤ 0.025, Cu ≤ 0.60) and Table 22 properties of at least 245 MPa proof strength and 410 MPa tensile strength. Typical uses include architectural panels and roofing, water tanks and heaters and appliance parts. Same plate thickness limits as the other high-Cr ferritics.
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 019Cr23MoTi 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 019Cr23Mo2Ti S12361 and GB/T 4237 019Cr19Mo2NbTi S11972, our GB/T 4237 category and the ASTM A240 Type 444 page. Send your sizes and quantities for a quotation.
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