H-shaped steel with guaranteed hardenability for structural use
| Supported standards | JIS G4052
|
|---|---|
| Names of steel types | SMn420H - SMn443H, SMnC420H - SMnC443H, SCr415H - SCr440H, SCM415H - SCM822H, SNC415H - SNC815H, SNCM220H - SNCM420H |
| Supported standards | AICHI |
|---|---|
| Names of steel types | AG20, SCMB21, SCM25M, SCM20Nb |
Features
Type of steel/Chemical composition
| Type | Type of steel | Main chemical components representative values (%) |
|||||
|---|---|---|---|---|---|---|---|
| C | Si | Mn | Cr | Mo | Other elements |
||
| High strength |
①Pitting resistant steel AG20 | 0.20 | 0.8 | 0.6 | 0.5 | 0.5 | Additives and adjustment |
| ②High strength cold forged gear steel SCMB21 | 0.21 | Low | 1.2 | 1.1 | 0.16 | ||
 |
③High strength gear steel SCM25M | 0.25 | Low | 0.8 | 1.1 | High | |
| Low carburizing time |
④Coarse grain prevention steel SCM20Nb | 0.20 | 0.25 | 0.8 | 1.1 | 0.16 | |
| Alloy | ⑤Low-Mo case hardening steel | 0.20 | Low | Adjusted | - | ||
Features/applications
| Type of steel | Characteristics | Applications |
|---|---|---|
| ①Pitting resistant steel AG20 | High strength gear steel achieving both gear pitting fatigue strength and bending fatigue strength improvements | Gears in high rotation/high surface pressure specification environments (planetary, gears, etc.) |
| ②High strength cold forged gear steel SCMB21 | Improve extremely low cycle fatigue strength and high strength gear steel with excellent cold forging characteristics | Gears requiring impact fatigue strength (differential gears, etc.) |
| ③High strength gear steel SCM25M |
|
Large gears/shafts (Hypoid gears, etc.) |
| ④Coarse grain prevention steel SCM20Nb | Reduces coarsening of crystal grains during hot carburizing at 1000℃ or higher | Parts with reduced carburizing times by high temperature carburizing |
| ⑤Low-Mo case hardening steel | Mo-less for strength characteristics equal to SCM420 and processing characteristics equivalent to SCr420 | Carburized parts using SCM420 |
Advantages
We provide steels responding to various needs of high strength, carburizing time reduction and alloy-savings.
- (1)
- Improved gear fatigue strength enables higher-capacity, reduction in size, weight and component count of units.
- (2)
- Reducing carburizing time allows the reduction of takt time, cost and CO2 emissions.
- (3)
- Alloy-savings reduce resource risks and cost.
Major applications
- Automotive/Truck:
- Variable gears, counter gears, differential gears, input/output shafts, inner/outer races
- Construction machineries:
- Gears, pinions, cylinder shafts
Product inquiries
Phone
AICHI STEEL Corporation
Sales and Planning Division
TEL +81 (52) 603-9362
Internet
Please complete any inquiries from the below.
- Please understand that we may not be able to accept specific orders depending on the circumstances even for information given on this website. Feel free to contact us for the latest information.
Note that information given on this website is subject to change without notice.