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  ASTM A297 Standard Specification for Steel Castings with Cr, Ni Alloy, Heat Resistant Alloy  
 

ASTM A297 A297M standard is for the chemical composition and physical properties of grade A297 HP, A297 HN, A297 HL, A297 HD, A297 HC, A297 HX, A297 HW, A297 HU, A297 HT, A297 HE, A297 HK, A297 HI, A297 HH, A297 HF.

A297 HP

CHEMICAL COMPOSITION
Carbon 0.35 – 0.75%
Manganese 2.00% Max
Silicon 2.50% Max
Phosphorus 0.04% Max
Sulfur 0.04% Max
Nickel 33.0 – 37.0%
Chromium 24.0 – 28.0%
Molybdenum 0.50% Max

PHYSICAL PROPERTIES
Tensile Strength 62,500 PSI Min
Yield Strength 34,000 PSI Min
Elongation at 2in. 4.5% Min

A297 HN

CHEMICAL COMPOSITION

Carbon 0.20 – 0.50%
Manganese 2.00% Max
Silicon 2.00% Max
Phosphorus 0.04% Max
Sulfur 0.04% Max
Nickel 23.0 – 27.0%
Chromium 19.0 – 23.0%
Molybdenum 0.50% Max

PHYSICAL PROPERTIES
Tensile Strength 63,000 PSI Min
Elongation at 2in. 8.0% Min

A297 HL

CHEMICAL COMPOSITION

Carbon 0.20 – 0.60%
Manganese 2.00% Max
Silicon 2.00% Max
Phosphorus 0.04% Max
Sulfur 0.04% Max
Nickel 18.0 – 22.0%
Chromium 28.0 – 32.0%
Molybdenum 0.50% Max

PHYSICAL PROPERTIES
Tensile Strength 65,000 PSI Min
Yield Strength 35,000 PSI Min
Elongation at 2in. 10.0% Min

A297 HD

CHEMICAL COMPOSITION

Carbon 0.50% Max
Manganese 1.50% Max
Silicon 2.00% Max
Phosphorus 0.04% Max
Sulfur 0.04% Max
Nickel 4.0 – 7.0%
Chromium 26.0 – 30.0%
Molybdenum 0.50% Max

PHYSICAL PROPERTIES
Tensile Strength 75,000 PSI Min
Yield Strength 35,000 PSI Min
Elongation at 2in. 8.0% Min

A297 HC

CHEMICAL COMPOSITION

Carbon 0.50% Max
Manganese 1.00% Max
Silicon 2.00% Max
Phosphorus 0.04% Max
Sulfur 0.04% Max
Nickel 4.00% Max
Chromium 26.0 – 30.0%
Molybdenum 0.50% Max

PHYSICAL PROPERTIES
Tensile Strength 55,000 PSI Min

A297 HX

CHEMICAL COMPOSITION

Carbon 0.35 – 0.75%
Manganese 2.00% Max
Silicon 2.50% Max
Phosphorus 0.04% Max
Sulfur 0.04% Max
Nickel 64.0 – 68.0%
Chromium 15.0 – 19.0%
Molybdenum 0.50% Max

PHYSICAL PROPERTIES
Tensile Strength 60,000 PSI Min

A297 HW

CHEMICAL COMPOSITION

Carbon 0.35 – 0.75%
Manganese 2.00% Max
Silicon 2.50% Max
Phosphorus 0.04%
Sulfur 0.04%
Nickel 58.0 – 62.0%
Chromium 10.0 – 14.0%
Molybdenum 0.50% Max

PHYSICAL PROPERTIES
Tensile Strength 60,000 PSI Min

A297 HU

CHEMICAL COMPOSITION

Carbon 0.35 – 0.75%
Manganese 2.00% Max
Silicon 2.50% Max
Phosphorus 0.04% Max
Sulfur 0.04% Max
Nickel 37.0 – 41.0%
Chromium 17.0 – 21.0%
Molybdenum 0.50%

PHYSICAL PROPERTIES
Tensile Strength 65,000 PSI Min
Elongation at 2in. 4.0% Min

A297 HT

CHEMICAL COMPOSITION

Carbon 0.35% – 0.75%
Manganese 2.00% Max
Silicon 2.50% Max
Phosphorus 0.04% Max
Sulfur 0.04% Max
Nickel 33.0 – 37.0%
Chromium 15.0 – 19.0%
Molybdenum 0.50% Max

PHYSICAL PROPERTIES
Tensile Strength 65,000 PSI Min
Elongation at 2in. 4.0% Min

A297 HE

CHEMICAL COMPOSITION

Carbon 0.20 – 0.50%
Manganese 2.00% Max
Silicon 2.00% Max
Phosphorus 0.04% Max
Sulfur 0.04% Max
Nickel 8.0 – 11.0%
Chromium 26.0 – 30.0%
Molybdenum 0.50% Max

PHYSICAL PROPERTIES
Tensile Strength 85,000 PSI Min
Yield Strength 40,000 PSI Min
Elongation at 2in. 9.0% Min

A297 HK

CHEMICAL COMPOSITION

Carbon 0.20 – 0.60%
Manganese 2.00% Max
Silicon 2.00% Max
Phosphorus 0.04% Max
Sulfur 0.04% Max
Nickel 18.0 – 22.0%
Chromium 24.0 – 28.0%
Molybdenum 0.50%

PHYSICAL PROPERTIES
Tensile Strength 65,000 PSI Min
Yield Strength 35,000 PSI Min
Elongation at 2in. 10.0% Min

A297 HI

CHEMICAL COMPOSITION

Carbon 0.20 – 0.50% Max
Manganese 2.00% Max
Silicon 2.00 % Max
Phosphorus 0.04% Max
Sulfur 0.04% Max
Nickel 14.0 – 18.0%
Chromium 26.0 – 30.00%
Molybdenum 0.50% Max

PHYSICAL PROPERTIES
Tensile Strength 70,000 PSI Min
Yield Strength 35,000 PSI Min
Elongation at 2in. 10.0% Min

A297 HH

CHEMICAL COMPOSITION

Carbon 0.20 – 0.50%
Manganese 2.00% Max
Silicon 2.00% Max
Phosphorus 0.04% Max
Sulfur 0.04% Max
Nickel 11.0 – 14.0%
Chromium 24.0 – 28.0%
Molybdenum 0.50%

PHYSICAL PROPERTIES
Tensile Strength 75,000 PSI Min
Yield Strength 35,000 PSI Min
Elongation at 2in. 10.0% Min

A297 HF

CHEMICAL COMPOSITION

Carbon 0.20 – 0.40%
Manganese 2.00% Max
Silicon 2.00% Max
Phosphorus 0.04% Max
Sulfur 0.04% Max
Nickel 8.0 – 12.0%
Chromium 18.0 – 23.0%
Molybdenum 0.50% Max

PHYSICAL PROPERTIES
Tensile Strength 70,000 PSI Min
Yield Strength 35,000 PSI Min
Elongation at 2in. 25.0% Min

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