JIS G3103 SB450M Steel Plate | SB450M 0.5Mo Boiler Plate supplier

SB450M is the lower molybdenum grade in JIS G3103. Buyers search JIS G3103 SB450M, SB450M steel plate, SB450M 0.5Mo, SB450M boiler plate and SB450M supplier. The letter M means molybdenum alloy steel. This page is not SB450. SB450 is carbon steel at the same tensile band. This page is not SB480M. SB480M is 480–620 MPa with the same Mo band. This page is not SB410 or SB480. Those two grades are carbon. This page is not EN 10028-2 16Mo3 unless both books are met.

Tensile is 450–590 MPa. Yield is 255 MPa min. Thickness is 6–150 mm, not 200 mm. Delivery is as-rolled up to 38 mm and normalized above 38 mm unless the order names another route. SHH STEEL is a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin). We buy this grade from qualified Chinese mills, check the certificate against JIS G3103, and ship it to fabricators in the USA, Europe, Middle East, Southeast Asia, Africa and South America.

If a drawing says SB450, we will not ship SB450M and call 450 enough. If a drawing says ASME SA204 Grade A, we will not stamp both names unless chemistry, tensile and delivery all fit.

This plate sits in pressure vessel steel plates and ASME SA204. High-temp European Mo sisters belong on EN 10028-2. Carbon JIS sisters stay on SB410 / SB450 / SB480. Japanese SPV sisters belong on JIS G3115.

Cast analysis follows JIS G3103. Product analysis is supplied when ordered.

Cast Analysis and Product Analysis — JIS G3103 SB450M

The Mo band is the point of this grade. SB450 does not have that Mo range. Do not treat residual Mo on a carbon heat as SB450M. SHH STEEL prints heat analysis on every certificate and product analysis when ordered. Density is 7.85 g/cm³.

Buyers search SB450M mechanical properties, SB450M yield strength and SB450M 0.5Mo.

Tensile and Yield — JIS G3103 SB450M

Bend test is 180°. Inside radius is tighter than on SB450 carbon plate of the same tensile band. Do not quote 245 MPa yield on SB450M. That number belongs to SB450. Do not treat 450–590 MPa as permission to stamp EN 10028-2 16Mo3 or ASME SA204 Grade A without checking both books.

Buyers pick SB450M when a Japanese boiler file wants 450 MPa plate and 0.45–0.60% Mo. Search phrases such as SB450M 0.5Mo, JIS G3103 SB450M and SB450M boiler plate all point here.

It is not a substitute for EN 10028-2 13CrMo4-5. That grade is 1.25Cr-0.5Mo. It is not a substitute for ASME SA387 Grade 12 Class 1. That grade is Cr-Mo. Dual marking with EN 10028-2 16Mo3 is possible only when both books are met.

SHH STEEL supplies this plate to fabricators in the United States, Mexico, South America, Europe, the Middle East, Africa and Asia.

SB450M is killed 0.5Mo boiler plate. Treat welding as production welding, and as boiler / PED / ASME Code welding when the equipment is a vessel.

Qualify to the applicable code. Consumables must match a 0.5Mo family, not a plain carbon family. A procedure written for SB450 carbon plate is the wrong chemistry. A procedure written for EN 10028-2 16Mo3 is the usual comparison. Preheat and interpass must stay inside the qualified window, especially on plate thicker than 38 mm that was normalized. The fabricator owns the WPS. SHH STEEL can share mill heat data for that review.

Usual delivery from SHH STEEL follows JIS G3103 for M grades:

• Thickness ≤ 38 mm: as-rolled. Normalizing or stress-relief may be added when ordered.
• Thickness > 38 mm up to 150 mm: normalized, or heated uniformly during hot forming to give the same effect as normalizing.

This split is not the 50 mm split used on SB410 / SB450 / SB480. Do not apply the carbon-grade thickness rule to SB450M.

If the vessel will see PWHT, say so. Simulated PWHT on test coupons is worth naming on a 0.5Mo boiler file. Extra simulation, 3.2 hold points or special NDE add time. Plan about two months when those extras are on the order.

The certificate lists JIS G3103 SB450M; heat number; cast analysis including Mo; product analysis when ordered; tensile; bend; delivery condition. Certificates may be EN 10204 3.1 or EN 10204 3.2.

Usual supply range from SHH STEEL for SB450M 0.5Mo boiler plate:

• Thickness: 6 mm – 150 mm
• Width: 1500 mm – 4000 mm
• Length: 3000 mm – 12000 mm

Carbon JIS G3103 plate can go to 200 mm. SB450M stops at 150 mm unless the mill agrees a special extra. Higher tensile Mo plate belongs on SB480M. European 0.3Mo plate belongs on EN 10028-2 16Mo3.

Dimensional limits for JIS G3103 SB450M follow JIS G3193 unless the purchase order names another table. Do not apply ASTM A36 structural tolerances to a 0.5Mo boiler plate without writing them. When dual-named against ASME SA204 Grade A, write whether JIS G3193 or SA-20 governs the minus on thickness.

Typical thickness tolerance idea for SB450M (JIS G3193 reference)

Width on 1500–4000 mm plate is commonly held to about ±20–25 mm unless the mill quote names a tighter extra. Length on 3000–12000 mm plate is commonly held to about +50 / 0 mm or ±25 mm by mill practice. Flatness follows JIS G3193 unless a tighter class is written. Edge condition is mill edge or cut edge as ordered. If the vessel calculation used minimum thickness after corrosion, write the allowed minus on the RFQ. SHH STEEL will not assume a zero-minus extra on SB450M unless the order says so.

JIS G3103 SB450M already defines tensile, bend, the Mo band and the 38 mm normalizing split. Extra items still have to be written on the purchase order. SHH STEEL will not assume them from the grade name alone.

Elevated-temperature proof. This is a mid-to-high temperature Mo boiler plate. Write the test temperatures if the design needs Rp0.2 at 200–450 °C.

Charpy details. SB450M does not assume −20 °C or −40 °C. Write temperature, joules, location and orientation if impact is required.

Impact after simulated PWHT. When the boiler will be stress-relieved, name hold temperature, hold time and cooling rate on the coupon. Mo plate can move after a long PWHT cycle.

Product analysis. Especially C by thickness band, Mo, P, S, Mn, Cu, Ni and Cr. The Mo range must sit inside 0.45–0.60% on cast analysis.

Through-thickness / Z-test. Name Z15, Z25 or Z35 when the plate will be welded in the thickness direction.

NDE. JIS ultrasonic practice, EN 10160, ASTM A435 or ASTM A578 as named. Write scanning extent and acceptance class.

Hardness. If the destination file caps hardness after rolling, after normalizing or after simulated PWHT, write the max HB and the test location.

HIC / SSC / NACE. Only when the equipment is sour service. SB450M is not automatically NACE MR0175 / ISO 15156.

Third-party witness. EN 10204 3.2 with SGS, TÜV, BV, ABS, CCS, DNV, NK, KR or the inspector named. Hold points for normalizing, Mo check, tensile, bend and UT should be listed on the ITP.

Identification and stamping. Heat number, grade SB450M, JIS G3103, thickness and mill logo on each plate. Transfer marks after cutting if the plate will be cut before shipment.

SB450M is the plate for a Japanese boiler file that wants 450 MPa and 0.5Mo. It is the wrong plate for plain carbon SB450. It is the wrong plate for 1.25Cr-0.5Mo. That work is EN 10028-2 13CrMo4-5.

SHH STEEL sources JIS G3103 SB450M from first-line Chinese mills and ships it on worldwide terms. Partner mills include Wuyang (Wugang), Angang, Shougang, Hanye, Anyang Iron & Steel, Baosteel, Xinyu, Xingcheng, Yongjin, Tsingshan, TISCO (Taiyuan), Jiuquan (JISCO), Lianzhong, Zhangpu and Baoxin, plus other qualified mills when the size or normalizing route requires it.

Mill test certificates are issued to EN 10204 3.1 as standard. EN 10204 3.2 is arranged when the order names a third-party hold point.

Usual stock and rolling thickness: 8 mm, 10 mm, 12 mm, 16 mm, 20 mm, 25 mm, 30 mm, 32 mm, 36 mm, 40 mm, 50 mm, 60 mm, 80 mm, 100 mm, thicker by mill agreement up to 150 mm.

Processing: CNC or flame cutting, bevel, flattening, UT to the named class.

Trade terms: FOB Shanghai main, CIF destination available. Payment: TT, LC, or TT + LC.

Ocean time from Shanghai: US West 14–18 days; US Gulf 28–35 days; Rotterdam / Antwerp 28–35 days; Jebel Ali 18–25 days; Singapore 7–12 days; other ports quoted.

Third-party: SGS, TÜV, BV, ABS, CCS, GL, VL, DNV, RINA, NK, KR, or the inspector named.

SHH STEEL is a global steel mill sourcing partner with mill partnerships in China. We supply ASTM, ASME, EN, DIN, JIS and GB steel to buyers in the United States, Europe, the Middle East, Southeast Asia, Africa and South America. Origin is mill-direct, China origin.

SHH STEEL has supplied steel plates to the USA, Mexico, Argentina, Peru, El Salvador, Spain, Netherlands, Germany, UAE, Saudi Arabia, South Africa, India, Thailand, Singapore, Vietnam, the Philippines, Japan and Korea.

Typical lead time: ex-stock 5–7 days; standard rolling / normalizing about 45–60 days; simulated PWHT / 3.2 about 2 months.

Experience on this grade is simple: keep the letter M. SB450 and SB450M are two different purchase orders. SHH STEEL as a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) prices SB450M from first-line mills, reports the 0.45–0.60% Mo band, records as-rolled or normalized by the 38 mm split, and issues 3.1 as standard or 3.2 when specified.

We keep the grade on the order. SB450M is not SB450. SB450M is not SB480M. SB450M is not EN 10028-2 P265GH. If the drawing says 16Mo3, we will not ship SB450M and call Mo close unless both books are met.

JIS G3103 SB450M Steel Plate is Japanese 0.5Mo boiler and pressure-vessel plate at 450–590 MPa tensile and 255 MPa yield. Whether the inquiry says JIS G3103 SB450M, SB450M 0.5Mo, SB450M boiler plate or SB450M supplier, SHH STEEL as a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) supplies plate with SB450M chemistry, recorded as-rolled or normalized delivery, and EN 10204 3.1 or 3.2 certification.

SHH STEEL supplies JIS G3103 SB450M 0.5Mo Boiler Plate to the USA, Mexico, South America, Europe, the Middle East, Africa and Asia for work that actually names this grade.

Contact SHH STEEL for mill rolling, stock inquiry, cutting, bevel, 3.2 inspection or a worldwide quotation.

JIS G3103 SB450M Steel Plate, SB450M 0.5Mo boiler plate, SB450M supplier, SHH STEEL