By Harris, Technical Team, SHUNFU METAL One Grade, Four Standard Systems AISI 4140 is the world's most widely specified chromium-molybdenum alloy steel, but the same steel travels under different names in different markets: EN 42CrMo4 (1.7225) in Europe, JIS SCM440 in Japan, BS 708M40 in Britain, GOST 40KhM in Russia, and 42CrMo under the Chinese
By Harris, Technical Team, SHUNFU METAL One Grade, Four Standard Systems AISI 4140 is the world's most widely specified chromium-molybdenum alloy steel, but the same steel carries different names in different markets: EN 42CrMo4 (1.7225) in Europe, JIS SCM440 in Japan, BS 708M40 in Britain, GOST 40KhM in Russia, and 42CrMo under the Chinese standard
P92 Casts Differently Because It Transforms Differently CSEF grade P92 is the 9% chromium, tungsten-bearing martensitic steel behind ultra-supercritical power-plant piping. Under ASME and ASTM it is SA-335 P92 (seamless pipe), with the European tube designation X10CrWMoVNb9-2 (EN 10216-2, material 1.4905) and the Chinese equivalent 10Cr9MoW2VNbBN under GB 5310-2017. The same chemistry also appears as
A Certified Grade That Still Failed at -40°C ASME SA612 is a killed carbon-manganese-silicon steel written for welded pressure vessels in moderate-and-lower temperature service. On paper it looks unbeatable: minimum yield 345 MPa, tensile 570-725 MPa, and a supplementary CVN requirement of 27 J average at -40°C, supplied normalized or normalized-and-tempered. Yet in one mill's
The 205 mm Milestone and What It Actually Proves A Chinese mill recently delivered a 205 mm thick plate of SA516Gr70 to an international high-end customer for pressure-vessel shell courses. The press release frames this as filling a domestic gap in extra-thick plate development. That framing is accurate but incomplete. The more honest reading is
For most of the world, AISI 4140 means one delivery condition: quench and temper (QT). The European equivalent is EN 42CrMo4 (W. Nr. 1.7225), the Chinese equivalent is GB/T 3077 42CrMo, the Japanese equivalent is JIS SCM440, and the UNS designation is G41400. This article looks at a heat treatment study published by Jiangyin Xingcheng
Spheroidizing annealing is the quiet step that decides whether a wind turbine bolt can be cold-formed at all - yet it rarely appears in supplier datasheets. The steel in question is AISI 4140, known in Europe as EN 42CrMo4 (W. Nr. 1.7225), in China as GB/T 3077 42CrMo, in Japan as JIS SCM440, and in
Vanadium is one of the smallest alloying additions a tube mill can make, and one of the most consequential. AISI 4140, the workhorse chromium-molybdenum steel behind hydraulic cylinder barrels, tool joints, drill collars and oilfield mechanical components, carries no vanadium by design. Its equivalents are well known: EN 42CrMo4 (W. Nr. 1.7225), GB/T 3077 42CrMo,
A double-layer architecture that dissolves the strength-vs-corrosion trade-off For decades, oil and gas specifiers have been told they must choose: a high-strength carbon-steel pipe that corrodes, or a solid corrosion-resistant alloy (CRA) pipe that costs. Metallurgically bonded bimetallic OCTG — a high-strength outer base pipe fused to a thin CRA inner liner through a pressure-fusion
What the patent actually protects — and why it should change how you specify offshore valve-body steel When an international EPC or OCTG buyer evaluates Chinese valve-body steel, the first question is always the same: which standard does it map to, and can the metallurgy be trusted? The invention that just earned China's 26th National