1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2002 09 23 Revised Updated and renumbered 1993 01 28 NE01-E-10127076-076 Revised & Updated P. Lee 1988 10 25 NE01E10000474027 Released H. Nikkel Printed copies are uncontrolled Page 1 of 2 Copyright 2002, Fo
2、rd Global Technologies, Inc. PISTON RING, ALLOY STEEL, COMPRESSION WSE-M1A309-A1 PISTON RING, ALLOY STEEL, COMPRESSION WSE-M1A309-A2 1. SCOPE The material defined by these specifications is a chromium silicon alloy steel that will be heat treated to produce a quenched and tempered product with high
3、strength and good relaxation properties at elevated temperatures. 2. APPLICATION These specifications were released originally for material used for upper compression piston rings. It is also commonly used for springs. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppl
4、iers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 CHEMICAL COMPOSITION (WEIGHT PERCENT) Carbon 0.50 - 0.60 Manganese 0.50 - 0.80 Phosphorus 0.035 max Sulfur 0.040 max Silicon 1.20 - 1.60 Chromium 0.50 - 0.80 The material is comp
5、arable to UNS-G92540/SAE J1249 9254 alloy steel. 3.3 HARDNESS HRC A1 A2 (ISO 6508/ASTM E 18) Finished ring - after processing 45.5 - 53.5 40 - 46 Average of three determinations around each part with individual values no more than two points below the minimum specified. ENGINEERING MATERIAL SPECIFIC
6、ATION WSE-M1A309-A1/A2 Page 2 of 2 Copyright 2002, Ford Global Technologies, Inc. 3.4 MICROSTRUCTURE The finished part must have a uniform microstructure of tempered martensite with no areas of complete decarburization or significant amounts of residual carbides. Partial decarburization, if present,
7、 must not exceed 0.025 mm in depth. 4. GENERAL INFORMATION The information below is provided for clarification and assistance in meeting the requirements of these specifications. 4.1 MECHANICAL PROPERTIES (ISO 6892/ASTM E 8) (Test samples from uncoiled wire that was heat treated along with the rings.) A1 A2 Tensile Strength, MPa, min 1450 1250 Yield Strength, MPa, min 1300 1150 Elongation, %, min 4 4
