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15-7 PH stainless steelAMS 5529 – Cold-rolled strip for springs (15-7PH spring stainless steel, CH900 temper)
AMS 5644 – Bars and forgings (for precision parts and shafts)
ASTM A564 – Bars and shapes (UNS S15700)
ASTM A705 – Forgings
EN 10088‑2 / 10088‑3 – Grade X7CrNiAl17-7 / 1.4568 (plate, sheet, bar)
JIS G4313 / G4314 – SUS631 (cold-rolled strip for springs, wire)
GB/T 3280 / 4237 – 07Cr17Ni7Al (Chinese equivalent)
NACE MR0175 – Limited use; not recommended for sour service
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253MA Stainless SteelASTM A312 / A213 – Seamless and welded pipe / tube (253MA for exhaust systems and petrochemical furnaces)
ASTM A182 / A182M – Forged flanges and fittings (Grade F45 for high temperature service)
ASTM A479 – Bars and shapes (UNS S30815)
EN 10216‑5 / 10217‑7 – Seamless / Welded tubes for pressure purposes (1.4835)
EN 10095 – Heat resisting steels and nickel alloys
JIS G4311 / G4312 – Heat‑resistant stainless steel plates and sheets (SUS310S is not equivalent; 253MA is proprietary)
GB/T 4238 – Chinese heat‑resistant steel plate (closest grade 1.4835 not directly listed)
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Alloy 803 stainless steelASTM B564 / ASME SB564 – Forgings (UNS N08803 flanges, fittings, valve components)
ASTM B829 – General requirements for seamless pipe and tube
ASTM B830 – General requirements for plate, sheet, and strip
ASTM B751 – General requirements for welded pipe and tube
EN 10204 / EN 10302 – Inspection certificates (3.1B) and creep‑resisting alloys (EN 1.4876 type)
ASME BPVC Section II, Part A – For pressure‑retaining components (boilers, pressure vessels)
JIS G4902 – Nickel alloys for pressure vessels and piping
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SUS416 stainless steelASTM A314 – Stainless steel billets and bars for forging (416 for forged valve bodies and fitting components)
ASTM A493 / A895 – Cold‑formed wire / round wire for spring and fasteners (416 wire for bolts, screws)
ASTM A380 – Cleaning and descaling (for machined parts)
EN 10088‑3 – Grade X14CrMoS17 / 1.4005 (equivalent to ASTM 416) for bars and wire
JIS G4303 – SUS416 stainless steel bars (cold or hot finished)
JIS G4318 – SUS416 stainless steel wire rod
JIS G4319 – SUS416 stainless steel fasteners
GB/T 1220 – Chinese grade Y1Cr13 / Y12Cr13 (Y indicates free‑cutting)
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303 stainless steel round barASTM A314 – Stainless steel billets and bars for forging (303 for forged fittings and valve components)
ASTM A493 / A895 – Cold‑formed wire / round wire for fasteners (303 wire for precision screws and threaded components)
EN 10088‑3 – Grade X10CrNiS18‑9 / 1.4305 (equivalent to 303) for bars and wire
JIS G4303 – SUS303 stainless steel bars (cold or hot finished)
JIS G4318 – SUS303 stainless steel wire rod
GB/T 1220 – Chinese grade Y1Cr18Ni9 / Y12Cr18Ni9 (Y indicates free‑cutting)
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Stainless Steel FlangeEN 1092-1 stainless steel flange – European standard for circular flanges (Type 01/02/05/11, PN6 to PN100, material 1.4301/1.4404/1.4462)
DIN stainless steel flange – German standard DIN 2576, 2632, 2633, 2634 (PN6 to PN64)
JIS stainless steel flange – Japanese standard JIS B2220 (5K, 10K, 16K, 20K, 30K, 40K, 63K)
ISO 7005-1 – Metallic flanges for pipes and fittings
API 6A / 17D – For oil and gas wellhead and Christmas tree flanges (higher pressure classes 2000–20000 psi)
BS 4504 – British standard for circular flanges
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Stainless Steel ElbowDIN stainless steel elbow – DIN 2605 (LR elbows), DIN 2615 (SR elbows), DIN 2606 (seamless), material 1.4301/1.4404/1.4541
EN 10253 stainless steel elbow – EN 10253‑2 (type A and B, stainless steel butt‑weld elbows, material 1.4307/1.4404/1.4462)
JIS stainless steel elbow – JIS B2311 (seamless), JIS B2312 (butt‑welded), grade SUS304/SUS316/SUS329J3L
GB/T 12459 – Chinese standard for butt‑weld elbows (LR/SR 90°, 45°, 180°, material equivalent to A403 WP304/WP316/WP316L)
ISO 5251 – Stainless steel butt‑weld fittings (general)
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Stainless Steel End CapDIN 2617 / DIN 2618 – Stainless steel caps for butt‑welding (material 1.4301/1.4404/1.4462)
EN 10253‑2 – Type B butt‑welding fittings (caps, stainless steel grades 1.4307/1.4404/1.4462)
JIS B2311 / B2312 – Seamless / welded butt‑weld fittings (SUS304, SUS316, SUS329J3L caps)
GB/T 12459 – Chinese standard for butt‑weld caps (grade corresponds to ASTM A403)
MSS SP‑43 – Light‑wall (Sch 5S and 10S) butt‑weld caps
ISO 5251 – Stainless steel butt‑weld fittings
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