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1.6745
Qilu
Product Description
EN 10250 1.6745 Quenching and Tempering Steel
1: 1.6745 Steel Introduction
1.6745 steel is a Cr-Mo series alloy structural steel with medium carbon content. It is a German steel grade according to EN 10250 standards. With high strength, excellent hardenability, good toughness, and low distortion during heat treatment, 1.6745 is widely used in high-stress components such as shafts, connecting rods, gears, fasteners, and high-pressure piping systems. This steel is typically supplied in a quenched and tempered condition, with a common hardness range of 28-32 HRC, ensuring a balanced combination of strength and ductility.
1.6745 Steel Stock in Warehouse
2: 1.6745 Quality Standard
DIN 1.6745 steel according to EN 10250.
3: Chemical Composition
| Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
| 1.6745 | 0.36-0.44 | 0.10-0.40 | 0.45-0.70 | 0.025 | 0.015 | 0.50-0.80 | 0.45-0.65 | 2.30-2.80 |
4: Mechanical Properties
Grade | H+T | Tensile strength | Yield strength | Elongation | Reduction | Impact Value | Hardness/HB |
| 1.6745 | +A | 251 | / | / | / | / | 190 |
1.6745 | +QT | 870 | 736 | 25 | 63 | 71/93/95 | 270/292/304 |
5: 1.6745 Steel Equivalent
| Country | Australia | Germany | Britain |
| Standard | X1444 | EN10250 | BS970 |
| Grade | X9940 | 40NiMoCr10-5/1.6745 | EN26/826M40 |
6: Goods available in China
In China, 1.6745 alloy steel is primarily made-to-order, with hot-rolled round bars and forged blanks requiring 4-8 weeks production time. Limited cold-finished bars may be available from specialty steel stockists with 3-6 week lead times. Minimum orders typically start at 2 tons for standard sizes, with comprehensive material testing reports available upon request.
